This document provides historical information on the evolution of computer motherboards from the 1980s to the late 1990s. It lists specifications for motherboards used with early Intel processors like the 8086, 80286, 80386, 486, and Pentium processors. The motherboards span various manufacturers including IBM, Compaq, Dell, and others. Key details provided for each motherboard include the processor, chipset, memory capacity, BIOS, dimensions, and jumper/switch settings for configuration.

1. PLACAS BASE EVOLUCIÓN HISTORICA
Especificaciones técnicas descargadas de: http://docs.van-diepen.com/
Procesador Placa base Fabricante
8086 PC-XT 5160-086 IBM
80286 PC/AT MODEL 5170-239 IBM
80286 PS/2 MODEL 60 IBM
80286 DESKPRO 286 (12MHz) COMPAQ
80386 SX SUPER-386S HYUNDAY
80386 DX SYSTEM V386DX/33 DELL
486 SUPER VOYAGER VLB-III ISA AMI
486 MB-4D33/50N Unidentified
Pentium I 100 ZIDA-5STXE ZIDA Tech.
Pentium I 100 MB-8500TAC Biostar Microt. Int.Corp.
Pentium I 200 P5T30_B4 Tekram Tech.
Pentium I 200 TX531 Dataexpert Corp.
Pentium I 200 AM-430TX+ Kadatco Co.
Pentium II 233 AL440LX Intel
Pentium II MMX 333 Legend V QDI Computer
Pentium II MMX 333 QS440BX BCM ADVANCED RES.

2. IBM CORPORATION
PC-XT 5160-086
Processor 8086
Processor Speed 4.77MHz
Chip Set None
Max. Onboard DRAM 256KB
Cache None
BIOS IBM
Dimensions 273mm x 218mm
I/O Options None
NPU Options 8087
USER CONFIGURABLE SETTINGS
Function Switch Position
Factory configured - do not alter SW1/1 Off
NPU disabled SW1/2 On
NPU enabled SW1/2 Off
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2 Bank 3
128KB (9) 4164 (9) 4164 NONE NONE
192KB (9) 4164 (9) 4164 (9) 4164 NONE
256KB (9) 4164 (9) 4164 (9) 4164 (9) 4164
DRAM SWITCH CONFIGURATION
Size SW1/3 SW1/4
128KB Off On

3. 192KB On Off
256KB Off Off
VIDEO CONFIGURATION
Setting SW1/5 SW1/6
CGA 80 x 25 On Off
CGA 40 x 25 Off On
MDA (or MDA and CGA) Off Off
None On On
FLOPPY DRIVE CONFIGURATION
Drives installed SW1/7 SW1/8
1 On On
2 Off On

4. IBM CORPORATION
PC/AT MODEL 5170-239
Processor 80286
Processor Speed 6MHz
Chip Set None
Max. Onboard DRAM 512KB
Cache None
BIOS IBM
Dimensions 355mm x 304mm
I/O Options None
NPU Options 80287
CONNECTIONS
Purpose Location Purpose Location
Speaker J19 External battery J21
Power LED & keylock J20
USER CONFIGURABLE SETTINGS
Function Jumper/Switch Position
14MHz adjust C26 N/A

5.
Monitor type select color SW1 On
Monitor type select monochrome SW1 Off
Note:Variable resistor C26 should not be altered except by competently trained technicians.
DRAM CONFIGURATION
Size Bank 0 P-0 Bank 1 P-0
256KB (16) ZA1250NL (2) ZA1250NL NONE NONE
512KB (16) ZA1250NL (2) ZA1250NL (16) ZA1250NL (2) ZA1250NL
DRAM JUMPER CONFIGURATION
Size J18
256KB pins 1 & 2 closed
512KB pins 2 & 3 closed
BIOS CONFIGURATION
Size U131
2716 pins 1 & 8, 2 & 7 closed
2732 pins 3 & 6, 4 & 5 closed

6. IBM CORPORATION
PS/2 MODEL 60
Processor 80286
Processor Speed 10MHz
Chip Set None
Max. Onboard DRAM 4MB
Cache None
BIOS IBM
Dimensions 330.2mm x 218.4mm
I/O Options Serial port, parallel port, pointing device connector, video port
floppy drive interface, hard drive interface slot, video expansion slot
NPU Options 80287

7. CONNECTIONS
Purpose Location Purpose Location
Power supply J2 Video port J10
Floppy drive J3 Serial port J11
Battery/speaker J5 Parallel port J12
Video expansion slot J8 Pointing device J13
Hard drive interface J9 Keyboard J14
slot
DRAM CONFIGURATION
Size Bank 0 Bank 1
1MB (2) 256K x 9 (2) 256K x 9
2MB (2) 1M x 9 NONE
2.5MB (2) 256K x 9 (2) 1M x 9
4MB (2) 1M x 9 (2) 1M x 9
Note:Onboard memory does not have to be full in order to utilize memory expansion cards.
Memory configurations are unverified.

8. COMPAQ COMPUTER CORPORATION
DESKPRO 286 (12MHz)
Processor 80286
Processor Speed 12MHz
Chip Set ETEQ
Max. Onboard DRAM 2.125MB
Cache None
BIOS Compaq
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
CONNECTIONS
Purpose Location Purpose Location
Fixed drive power J109 Proprietary keyboard connector J116
Fixed drive/Tape backup power J110 Main power J117
Floppy drive power J111 External battery J118
Floppy drive power J112 Keylock J119
Monitor power J113 Onboard power LED LED1
Speaker J115
USER CONFIGURABLE SETTINGS
Function Jumper/Switch Position
Oscillator type select single package E3 Closed
Oscillator type select dual package E3 Open
Memory operation generation select discrete gate E4 pins 1 & 2 closed
Memory operation generation select CBC internal E4 pins 2 & 3 closed
Auto slowdown disabled in software E5 pins 1 & 2 closed
Auto slowdown enabled in software E5 pins 2 & 3 closed
CPU speed select switchable at keyboard SW1/6 Off
CPU speed select forced slow SW1/6 On
Factory configured - do not alter SW1/7 Off
Monitor type select color SW1/8 On
Monitor type select monochrome SW1/8 Off
Notes: Settings for E3, E4, and E5 are accomplished by cutting the conductors on the bottom of the board and re-soldering the

9. indicated locations. WARNING: Modifying E3, E4, or E5 will void the manufacturers warranty!
DRAM CONFIGURATION
Size Bank 0 P-0 Bank 1 Bank 2 Bank 3 Bank 4
256KB (4) 4464 (2) 4164 (18) 4164 NONE NONE NONE
512KB (4) 4464 (2) 4164 (18) 4164 (18) 4164 (18) 4164 NONE
640KB (4) 4464 (2) 4164 (18) 4164 (18) 4164 (18) 4164 (18) 4164
640KB (4) 4464 (2) 4164 (18) 41256 NONE NONE NONE
1.125MB (4) 4464 (2) 4164 (18) 41256 (18) 41256 NONE NONE
1.625MB (4) 4464 (2) 4164 (18) 41256 (18) 41256 (18) 41256 NONE
2.125MB (4) 4464 (2) 4164 (18) 41256 (18) 41256 (18) 41256 (18) 41256
DRAM SWITCH CONFIGURATION
Size SW1/1 SW1/2 SW1/3 SW1/4 SW1/5
Disabled N/A On On N/A N/A
256KB On On Off Off Off
512KB On Off On Off Off
640KB On Off Off Off Off
640KB Off Off Off On On
1.125MB Off Off Off On Off
1.625MB Off Off Off Off On
2.125MB Off Off Off Off Off
Notes: Closing both SW1/switch 2 and SW1/switch 3, disables banks 0 & 1 and any onboard ROM.
ROM JUMPER CONFIGURATION
ROM type Size BIOS ROM/E1 ROM set 2/E2
Static 8K x 8 1 & 2, 4 & 5, 7 & 8 1 & 2, 4 & 5, 7 & 8
Static 16K x 8 2 & 3, 4 & 5, 7 & 8 2 & 3, 4 & 5, 7 & 8
Static 32K x 8 2 & 3, 4 & 5, 7 & 8 2 & 3, 5 & 6, 7 & 8
Dynamic 8K x 8 1 & 2, 4 & 5, 8 & 9 1 & 2, 4 & 5, 8 & 9
Dynamic 16K x 8 2 & 3, 4 & 5, 8 & 9 2 & 3, 4 & 5, 8 & 9
Dynamic 32K x 8 2 & 3, 5 & 6, 8 & 9 2 & 3, 5 & 6, 8 & 9
Notes: Settings are accomplished by cutting the conductors on the bottom of the board and re-soldering the indicated locations. Pins
designated should be in the closed position.
WARNING: Modifying the factory configurations will void the manufacturers warranty!

10. HYUNDAI ELECTRONICS, INC.
SUPER-386S
Processor 80386SX
Processor Speed 16MHz
Chip Set VLSI
Max. Onboard DRAM 16MB (8MB on external memory card)
Cache None
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options 32-bit external memory card, floppy drive interface, IDE interface, parallel port, serial port
NPU Options 80387SX
CONNECTIONS
Purpose Location Purpose Location
Reset switch J1 IDE interface J7
Turbo LED J2 Floppy drive interface J8
Turbo LED J3 Serial port J11
Speaker J4 Parallel port J12
IDE interface LED J5 32-bit external memory card SL1
USER CONFIGURABLE SETTINGS

11. Function Jumper/Switch Position
» NPU disabled J13 Closed
NPU enabled J13 Open
» COM 1 IRQ select IRQ4 SW1/1 On
COM 1 IRQ select IRQ3 SW1/1 Off
» COM 2 IRQ select IRQ3 SW1/2 Off
COM 2 IRQ select IRQ4 SW1/2 On
» LPT 2 IRQ select IRQ5 SW1/3 Off
LPT 2 IRQ select IRQ7 SW1/3 On
» LPT 1 IRQ select IRQ7 SW1/4 On
LPT 1 IRQ select IRQ5 SW1/4 Off
» Serial port enabled SW2/1 Off
Serial port disabled SW2/1 On
» Serial port select COM1 SW2/2 Off
Serial port select COM2 SW2/2 On
» Parallel port enabled SW2/3 Off
Parallel port disabled SW2/3 On
» Parallel port select LPT1 SW2/4 Off
Parallel port select LPT2 SW2/4 On
» DRAM size select 256K W7 pins 1 & 2 closed
DRAM size select 1MB W7 pins 2 & 3 closed
» Monitor type select color W12 pins 1 & 2 closed
Monitor type select monochrome W12 pins 2 & 3 closed
» Hard drive adapter select Conner CP344/3024 E4 W15 pins 1 & 2 closed
Hard drive adapter select Conner CP342/3022 E3 W15 pins 2 & 3 closed
Note: The location of W7 is unidentified.
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2 Bank 3
512KB (2) 256K x 9 NONE NONE NONE
1MB (2) 256K x 9 (2) 256K x 9 NONE NONE
2MB (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 (2) 256K x 9
2MB (2) 1M x 9 NONE NONE NONE
4MB (2) 1M x 9 (2) 1M x 9 NONE NONE
5MB (2) 1M x 9 (2) 1M x 9 (2) 256K x 9 (2) 256K x 9
5MB (2) 256K x 9 (2) 256K x 9 (2) 1M x 9 (2) 1M x 9
8MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 (2) 1M x 9
DRAM SWITCH CONFIGURATION
Bank 0 Bank 1 Bank 2 Bank 3 SW3/1 SW3/2 SW3/3
Installed Installed Not installed Not installed Off On On
Installed Installed Installed Not installed Off Off On
Installed Installed Installed Installed Off Off Off
DRAM SWITCH CONFIGURATION
Bank Bank Bank Bank SW3/4 SW3/5
0 1 2 3
512KB 512KB 512KB 512KB On On
2MB 2MB 512KB 512KB Off On
2MB 2MB 2MB 2MB Off Off
FAST MEMORY CONFIGURATION
Size SW4/1 SW4/2 SW4/3 SW4/4 SW4/5
1MB On On On On On
2MB Off On On On On
4MB Off Off On On On
5MB Off Off Off On On
8MB Off Off Off Off On
16MB Off Off Off Off Off
MEMORY MODE CONFIGURATION
Mode W1 W2 W3 W6

12. Page mode pins 1 & 2 closed pins 1 & 2 closed pins 1 & 2 closed pins 1 & 2
closed
Normal mode pins 2 & 3 closed pins 2 & 3 closed pins 2 & 3 closed pins 2 & 3
closed
Note: The locations of W1, W2, W3, & W6 are unidentified.
MEMORY BANK SIZE CONFIGURATION
Type W9 W10
512KB installed in Banks 0, 1, 2, 3 pins 2 & 3 closed pins 2 & 3 closed
2MB installed in Banks 0, 1, 2, 3 pins 1 & 2 closed pins 1 & 2 closed
CPU SPEED CONFIGURATION
Speed W14
Keyboard control pins 1 & 2 closed
Low pins 2 & 3 closed
High Open
Note: The location of W14 is unidentified.
FLOPPY DRIVE SPEED CONFIGURATION
Setting W11
Two speed spindle motor (logic = 0, jumper on) pins 1 & 2 closed
Precomp value (logic = 0 jumper on - 187NS; logic = 1 jumper off - 125NS) pins 3 & 4 closed
FLOPPY/HARD DRIVE CONFIGURATION
Setting W13
On board floppy drive enabled Open
On board floppy drive disabled pins 3 & 4 closed
On board hard drive enabled Open
On board hard drive disabled pins 1 & 2 closed
I/O WAIT STATE CONFIGURATION
Wait state W4 W5
4 W/S (8-bit memory) pins 1 & 2 closed N/A
5 W/S (8-bit memory) pins 2 & 3 closed N/A
1 W/S (16-bit memory) N/A pins 1 & 2 closed
2 W/S (16-bit memory) N/A pins 2 & 3 closed

13. DELL COMPUTER CORPORATION
SYSTEM V386DX/33
Processor 80386DX
Processor Speed 33MHz
Chip Set VLSI
Max. Onboard DRAM 64MB
Cache 16KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (2),
VGA connector
NPU Options 80387DX
CONNECTIONS
Purpose Location Purpose Location
VGA connector CN1 IDE interface CN7
PS/2 mouse CN2 Reset switch P11
connector
Serial port 2 CN3 Speaker P12
Serial port 1 CN4 Power LED & keylock P13
Parallel port CN5 Turbo LED P14
Floppy drive interface CN6 Turbo switch P15
USER CONFIGURABLE SETTINGS
Function Jumper/Switch Position
» VGA IRQ generation enabled JP1 pins 2 & 3 closed
VGA IRQ generation disabled JP1 pins 1 & 2 closed
» On board VGA enabled JP2 pins 2 & 3 closed
On board VGA disabled JP2 pins 1 & 2 closed
» Single IDE drive installed JP3 pins 1 & 2 closed
Dual IDE drives installed JP3 Open
» Monitor type select color JP6 pins 1 & 2 closed

14. Monitor type select monochrome JP6 pins 2 & 3 closed
» CMOS memory normal operation JP7 pins 2 & 3 closed
CMOS memory clear JP7 pins 1 & 2 closed
» Power good signal detect from power supply enabled JP10 pins 1 & 2 closed
Power good signal detect from power supply disabled JP10 pins 2 & 3 closed
» Monitor type select all others SW1/1 Off
Monitor type select old Multisync SW1/1 On
» VGA type select PS/2 SW1/2 On
VGA type select AT SW1/2 Off
» Monitor resolution select 1024 x 768 interlaced SW1/5 On
Monitor resolution select 1024 x 768 non interlaced SW1/5 Off
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2 Bank 3
4MB (1) 1M x 36 NONE NONE NONE
8MB (1) 1M x 36 (1) 1M x 36 NONE NONE
12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE
16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36
16MB (1) 4M x 36 NONE NONE NONE
20MB (1) 4M x 36 (1) 1M x 36 NONE NONE
24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE
28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36
32MB (1) 4M x 36 (1) 4M x 36 NONE NONE
36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE
40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36
48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE
52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36
64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36
CACHE CONFIGURATION
Size Bank 0
16KB (2) 8K x 8
Note: The location of the cache bank is unknown. Cache is factory installed and is not configurable.
VIDEO MEMORY CONFIGURATION
Size Bank 0 Bank 1
256KB (1) 256K x 8 NONE
512KB (1) 256K x 8 (1) 256K x 8
Note: Bank 0 is factory installed and is not configurable.
VIDEO REFRESH RATE CONFIGURATION (800 X 600)
Refresh rate Colors SW1/3 SW1/4
56Hz/56Hz 16/256 On On
60Hz/60Hz 16/256 Off On
72Hz/60Hz 16/256 Off Off
72Hz/56Hz 16/256 On Off
SELECTED MONITOR CONFIGURATION
Type SW1/1 SW1/2 SW1/3 SW1/4 SW1/5
Royal VGA (.39i) Off On Off On On
Royal SVGA (.28i) Off On Off On On
LiteOn SVGA (.28i) Off On On On On
LiteOn UVGA (.28ni) Off On Off On Off
Note: These settings represent the factory default settings.

15. AMERICAN MEGATRENDS, INC.
SUPER VOYAGER VLB-III ISA
Processor 80486SX/80487SX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor Speed 25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz
Chip Set AMI
Max. Onboard DRAM 128MB
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive interface, green PC connector, IDE interface, parallel port,
PS/2 mouse interface, serial ports (2)
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
PS/2 mouse interface J1 Speaker J27
IDE interface LED J2 Power LED & keylock J31
Green PC connector (power) J3 Reset switch J32
Parallel port J5 Turbo switch J33
Floppy drive interface J8 Password LED J38
IDE interface J9 Turbo LED J40
External battery J10 Green PC connector (monitor) J47
Serial port 1 J13 32-bit VESA local bus slots SL1 & SL2
Serial port 2 J14
Note: The locations of J2 & J3 are unidentified.
USER CONFIGURABLE SETTINGS
Function Jumper Position
» Factory configured - do not alter J11 Open
» Factory configured - do not alter J12 Open
» Factory configured - do not alter J18 Open
» Factory configured - do not alter J15 Open
» Parallel port IRQ select IRQ7 J22 pins 1 & 2 closed
Parallel port IRQ select IRQ5 J22 pins 2 & 3 closed

16. » Factory configured - do not alter J26 Open
» Serial port 2 IRQ select IRQ3 J28 pins 1 & 2 closed
Serial port 2 IRQ select IRQ4 J28 pins 2 & 3 closed
» Serial port 1 IRQ select IRQ4 J29 pins 1 & 2 closed
Serial port 1 IRQ select IRQ3 J29 pins 2 & 3 closed
» On board mouse enabled J30 pins 1 & 2 closed
On board mouse disabled J30 pins 2 & 3 closed
» Password LED is used on front panel J39 pins 1 & 2 closed
Password LED using J38 J39 pins 2 & 3 closed
» CPU type select PGA J42 pins 1 & 2 closed
CPU type select PQFP J42 pins 2 & 3 closed
» CMOS memory normal operation J48 pins 1 & 2 closed
CMOS memory clear J48 pins 2 & 3 closed
» BIOS type select 27256 J51 pins 1 & 2 closed
BIOS type select 27512 J51 pins 2 & 3 closed
Note: The locations of J26 & J39 are unidentified.
DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2 Bank 3
1MB (1) 256K x 36 NONE NONE NONE
2MB (1) 256K x 36 (1) 256K x 36 NONE NONE
2MB (1) 512K x 36 NONE NONE NONE
4MB (1) 256K x 36 (1) 256K x 36 (1) 512K x 36 NONE
4MB (1) 512K x 36 (1) 512K x 36 NONE NONE
4MB (1) 1M x 36 NONE NONE NONE
5MB (1) 256K x 36 (1) 1M x 36 NONE NONE
6MB (1) 256K x 36 (1) 256K x 36 (1) 1M x 36 NONE
6MB (1) 512K x 36 (1) 1M x 36 NONE NONE
8MB (1) 256K x 36 (1) 256K x 36 (1) 512K x 36 (1) 1M x 36
8MB (1) 512K x 36 (1) 512K x 36 (1) 1M x 36 NONE
8MB (1) 1M x 36 (1) 1M x 36 NONE NONE
8MB (1) 2M x 36 NONE NONE NONE
10MB (1) 256K x 36 (1) 256K x 36 (1) 1M x 36 (1) 1M x 36
12MB (1) 512K x 36 (1) 512K x 36 (1) 1M x 36 (1) 1M x 36
12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE
16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36
16MB (1) 2M x 36 (1) 2M x 36 NONE NONE
DRAM CONFIGURATION (CON'T)
Size Bank 0 Bank 1 Bank 2 Bank 3
16MB (1) 4M x 36 NONE NONE NONE
17MB (1) 256K x 36 (1) 4M x 36 NONE NONE
18MB (1) 256K x 36 (1) 256K x 36 (1) 4M x 36 NONE
18MB (1) 512K x 36 (1) 4M x 36 NONE NONE
20MB (1) 512K x 36 (1) 512K x 36 (1) 4M x 36 NONE
20MB (1) 1M x 36 (1) 4M x 36 NONE NONE
24MB (1) 512K x 36 (1) 512K x 36 (1) 1M x 36 (1) 4M x 36
24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE
24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 NONE
32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36
32MB (1) 4M x 36 (1) 4M x 36 NONE NONE
32MB (1) 8M x 36 NONE NONE NONE
36MB (1) 512K x 36 (1) 512K x 36 (1) 4M x 36 (1) 4M x 36
36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE
36MB (1) 1M x 36 (1) 8M x 36 NONE NONE
40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36
40MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 NONE
48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE
48MB (1) 4M x 36 (1) 8M x 36 NONE NONE
64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36
64MB (1) 16M x 36 NONE NONE NONE
64MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 NONE
64MB (1) 8M x 36 (1) 8M x 36 NONE NONE
65MB (1) 256K x 36 (1) 16M x 36 NONE NONE
68MB (1) 1M x 36 (1) 16M x 36 NONE NONE

17. 68MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 NONE
72MB (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 NONE
72MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 (1) 8M x 36
80MB (1) 4M x 36 (1) 16M x 36 NONE NONE
80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 NONE
96MB (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 NONE
96MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 (1) 8M x 36
96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 NONE
128MB (1) 16M x 36 (1) 16M x 36 NONE NONE
128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36
CACHE CONFIGURATION
Size Bank 0 Bank 1
64KB (4) 8K x 8 (4) 8K x 8
256KB (4) 32K x 8 (4) 32K x 8
CACHE JUMPER CONFIGURATION
Size SW1/1 SW1/2 SW1/3 SW1/4
64KB Off Off Off Off
256KB On On On On
CPU TYPE CONFIGURATION
Type J19 J37 J43 J54
80486SX 1 & 2, 3 & 4 Open Open N/A
80487SX 1 & 2, 3 & 4 Open Open 2&3
80486DX/DX2 1 & 2, 3 & 4 Open Open 1&2
80486DX4 (2x) 2&3 1&2 Open 1&2
80486DX4 (2.5x) 2&3 2&3 Open 1&2
80486DX4 (3x) 2&3 Open Open 1&2
P23T 1 & 2, 3 & 4 Open Open 2&3
P4S, P23S, P24S 2&3 Open Open 1&2
P24CT 3&4 Open Closed 2&3
P24D 3&4 Open Closed 1&2
Pentium Overdrive 3&4 Open Closed 2&3
Note: Pins designated should be in the closed position.
CPU TYPE CONFIGURATION (CON'T)
Type J55 J56 J57
80486SX 2&3 Open 1 & 2, 3 & 4, 5 & 6
80487SX 1 & 2, 3 & 4 Open 1 & 2, 3 & 4, 5 & 6
80486DX/DX2 1 & 2, 3 & 4 Open 1 & 2, 3 & 4, 5 & 6
80486DX4 (2x) 1 & 2, 3 & 4 1 & 2, 3 & 4, 5 & 6 Open
80486DX4 (2.5x) 1 & 2, 3 & 4 1 & 2, 3 & 4, 5 & 6 Open
80486DX4 (3x) 1 & 2, 3 & 4 1 & 2, 3 & 4, 5 & 6 Open
P23T 1 & 2, 3 & 4 Open 1 & 2, 3 & 4, 5 & 6
P4S, P23S, P24S 1 & 2, 3 & 4 Open 1 & 2, 3 & 4, 5 & 6
P24CT 1 & 2, 3 & 4 1 & 2, 3 & 4, 5 & 6 Open
P24D 1 & 2, 3 & 4 1 & 2, 3 & 4, 5 & 6 1 & 2, 3 & 4, 5 & 6
Pentium Overdrive 1 & 2, 3 & 4 Open 1 & 2, 3 & 4, 5 & 6
Note: Pins designated should be in the closed position.
VESA SPEED (ID2 & ID3) CONFIGURATION
Speed J16 (ID3) J17 (iD2)
25MHz pins 1 & 2 closed pins 1 & 2 closed
33MHz pins 1 & 2 closed pins 1 & 2 closed
40MHz pins 2 & 3 closed pins 2 & 3 closed
50iMHz pins 1 & 2 closed pins 1 & 2 closed
50MHz pins 2 & 3 closed pins 2 & 3 closed
66iMHz pins 1 & 2 closed pins 1 & 2 closed
75iMHz pins 1 & 2 closed pins 1 & 2 closed
100iMHz pins 2 & 3 closed pins 2 & 3 closed
DMA CONFIGURATION
DMA J41 J44
None Open Open
DRQ0 pins 1 & 2 closed pins 1 & 2 closed
DRQ1 pins 3 & 4 closed pins 3 & 4 closed
DRQ3 pins 5 & 6 closed pins 5 & 6 closed

18. UNIDENTIFIED
486SX/DX/DX2
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set UMC
Max. Onboard DRAM 64MB
Cache 64/128/256KB
BIOS Award
Dimensions 254mm x 220mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
Speaker J2 Reset switch J6
Power LED & keylock J3 External battery J11
Turbo switch J4 32-bit VESA local bus slots SL1 & SL2
Turbo LED J5
USER CONFIGURABLE SETTINGS
Function Jumper Position
» PQFP CPU disabled JP8 Open
PQFP CPU enabled JP8 Closed
» VESA video card select normal JP16 pins 1 & 2 closed

19. VESA video card select Power A9000 JP16 pins 2 & 3 closed
DRAM CONFIGURATION
Size Bank 0 Bank 1
1MB (4) 256K x 9 NONE
1MB NONE (1) 256K x 36
2MB (4) 256K x 9 (1) 256K x 36
4MB (4) 1M x 9 NONE
4MB NONE (1) 1M x 36
5MB (4) 1M x 9 (1) 256K x 36
8MB (4) 1M x 9 (1) 1M x 36
16MB (4) 4M x 9 NONE
16MB NONE (1) 4M x 36
17MB (4) 4M x 9 (1) 256K x 36
20MB (4) 4M x 9 (1) 1M x 36
32MB (4) 4M x 9 (1) 4M x 36
64MB (4) 16M x 9 NONE
CACHE CONFIGURATION
Size Bank 0 Bank 1 TAG
64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8
128KB (4) 32K x 8 NONE (1) 8K x 8
256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8
CACHE JUMPER CONFIGURATION
Size JP1 JP2 JP4 JP5
64KB pins 1 & 2 closed pins 1 & 2 closed pins 2 & 3 closed pins 1 & 2 closed
128KB pins 2 & 3 closed pins 2 & 3 closed pins 1 & 2 closed pins 1 & 2 closed
256KB pins 1 & 2 closed pins 1 & 2 closed pins 1 & 2 closed pins 2 & 3 closed
CPU TYPE CONFIGURATION
Type JP6 JP7
80486SX pins 2 & 3 closed Open
80487SX pins 1 & 2, 3 & 4 closed pins 2 & 3 closed
80486DX pins 1 & 2, 3 & 4 closed pins 1 & 2 closed
80486DX2 pins 1 & 2, 3 & 4 closed pins 1 & 2 closed
CPU SPEED CONFIGURATION
Speed JP9 JP10 JP11 JP12
16MHz Closed Closed Closed Closed
20MHz Open Closed Closed Open
25MHz Closed Open Closed Open
33MHz Closed Closed Open Open
40MHz Open Open Closed Open
50iMHz Closed Open Closed Open
50MHz Open Closed Open Open
66iMHz Closed Closed Open Open
BUS SPEED CONFIGURATION
CPU speed ID3
<= 33MHz Open
> 33MHz Closed

20. ZIDA TECHNOLOGIES INC.
5STX-E (VER. 1.10)
Device Type Mainboard
Processor CX 6X86/IBM 6X86/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed 90/100/120/133/150/166/200/233MHz
Chip Set Intel 430TX
Video Chip Set None
Maximum Onboard Memory 256MB (EDO & SDRAM supported)
Maximum Video Memory None
Cache 256/512KB
BIOS Award
Dimensions 220mm x 204mm
I/O Options 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2),
PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2)
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
Serial port 1 J1 IR connector JP2/pins 16 - 20
Floppy drive interface J2 PCI media connector JP6
IDE interface 1 J3 ISA media connector JP7
IDE interface 2 J4 Power LED & keylock JP10/pins 1 – 5
Serial port 2 J5 Green PC connector JP10/pins 7 & 8
Parallel port J6 Speaker JP10/pins 10 – 13
USB connector 1 JP2/pins 1 - 5 IDE interface LED JP10/pins 14 & 15
PS/2 mouse interface JP2/pins 6 – 10 Reset switch JP10/pins 22 & 23
USB connector 2 JP2/pins 11 – 15 32-bit PCI slots PC1 – PC3
USER CONFIGURABLE SETTINGS
Function Label Position
» CMOS memory normal operation JP3 Pins 2 & 3 closed

21. CMOS memory clear JP3 Pins 1 & 2 closed
» Factory configured - do not alter JP8 Unidentified
» Factory configured - do not alter JP9 Unidentified
» Factory configured - do not alter JP12 Unidentified
SIMM CONFIGURATION
Size Bank 0 Bank 1
8MB (2) 1M x 36 None
16MB (2) 2M x 36 None
16MB (2) 1M x 36 (2) 1M x 36
24MB (2) 2M x 36 (2) 1M x 36
32MB (2) 4M x 36 None
32MB (2) 2M x 36 (2) 2M x 36
40MB (2) 4M x 36 (2) 1M x 36
48MB (2) 4M x 36 (2) 2M x 36
64MB (2) 8M x 36 None
64MB (2) 4M x 36 (2) 4M x 36
72MB (2) 8M x 36 (2) 1M x 36
80MB (2) 8M x 36 (2) 2M x 36
96MB (2) 8M x 36 (2) 4M x 36
SIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1
128MB (2) 8M x 36 (2) 8M x 36
128MB (2) 16M x 36 None
136MB (2) 16M x 36 (2) 1M x 36
144MB (2) 16M x 36 (2) 2M x 36
160MB (2) 16M x 36 (2) 4M x 36
192MB (2) 16M x 36 (2) 8M x 36
256MB (2) 16M x 36 (2) 16M x 36
Note: Board accepts EDO memory.
DIMM CONFIGURATION
Size Bank 2
8MB (1) 1M x 64
16MB (1) 2M x 64
32MB (1) 4M x 64
64MB (1) 8M x 64
128MB (1) 16M x 64
256MB (1) 32M x 64
Note: Board accepts SDRAM memory.
CACHE CONFIGURATION
Size Bank 0 Bank 1 TAG
256KB (2) 32K x 32 None Unidentified
512KB (2) 32K x 32 (2) 32K x 32 Unidentified
512KB (2) 64K x 32 None Unidentified
Note: The location of the banks is unidentified.
CPU SPEED SELECTION (CX 6X86)
CPU speed Clock Multiplier JP4 JP5 JP11
speed
133MHz 55MHz 2x 3 & 5, 4 & 6 1&2 1 & 3, 4 & 6
166MHz 66MHz 2x 2 & 4, 3 & 5 2&3 1 & 3, 4 & 6
200MHz 75MHz 2x 1 & 3, 4 & 6 1&2 1 & 3, 4 & 6
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (IBM 6X86)
CPU speed Clock Multiplier JP4 JP5 JP11
speed
133MHz 55MHz 2x 3 & 5, 4 & 6 1&2 1 & 3, 4 & 6
166MHz 66MHz 2x 2 & 4, 3 & 5 2&3 1 & 3, 4 & 6
200MHz 75MHz 2x 1 & 3, 4 & 6 1&2 1 & 3, 4 & 6

22. Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K5)
CPU speed Clock Multiplier JP4 JP5 JP11
speed
90MHz 60MHz 1.5x 1 & 3, 4 & 6 2&3 1 & 3, 2 & 4
100MHz 66MHz 1.5x 2 & 4, 3 & 5 2&3 1 & 3, 2 & 4
133MHz 66MHz 1.5x 2 & 4, 3 & 5 2&3 1 & 3, 2 & 4
150MHz 60MHz 1.75x 1 & 3, 4 & 6 2&3 3 & 5, 4 & 6
166MHz 66MHz 1.75x 2 & 4, 3 & 5 2&3 3 & 5, 4 & 6
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K6)
CPU speed Clock speed Multiplier JP4 JP5 JP11
166MHz 66MHz 2.5x 2 & 4, 3 & 5 2&3 3 & 5, 4 & 6
200MHz 66MHz 3x 2 & 4, 3 & 5 2&3 2 & 4, 3 & 5
233MHz 66MHz 3.5x 2 & 4, 3 & 5 2&3 1 & 3, 2 & 4
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL)
CPU speed Clock speed Multiplier JP4 JP5 JP11
90MHz 60MHz 1.5x 1 & 3, 4 & 6 2&3 1 & 3, 2 & 4
100MHz 66MHz 1.5x 2 & 4, 3 & 5 2&3 1 & 3, 2 & 4
120MHz 60MHz 2x 1 & 3, 4 & 6 2&3 1 & 3, 4 & 6
133MHz 66MHz 2x 2 & 4, 3 & 5 2&3 1 & 3, 4 & 6
150MHz 60MHz 2.5x 1 & 3, 4 & 6 2&3 3 & 5, 4 & 6
166MHz 66MHz 2.5x 2 & 4, 3 & 5 2&3 3 & 5, 4 & 6
200MHz 66MHz 3x 2 & 4, 3 & 5 2&3 2 & 4, 3 & 5
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL MMX)
CPU speed Clock speed Multiplier JP4 JP5 JP11
166MHz 66MHz 2.5x 2 & 4, 3 & 5 2&3 3 & 5, 4 & 6
200MHz 66MHz 3x 2 & 4, 3 & 5 2&3 2 & 4, 3 & 5
233MHz 66MHz 3.5x 2 & 4, 3 & 5 2&3 1 & 3, 2 & 4
Note: Pins designated should be in the closed position.
CPU VOLTAGE SELECTION
Voltage JP14 JP15
2.8v 1 & 3, 4 & 6 1 & 3, 2 & 4
2.9v 1 & 3, 4 & 6 2 & 4, 3 & 5
3.2v 3 & 5, 4 & 6 1 & 3, 2 & 4
3.4v 3 & 5, 4 & 6 1 & 3, 4 & 6
3.5v 3 & 5, 4 & 6 3 & 5, 4 & 6

23. BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-8500TAC
Processor Pentium
Processor Speed 75/90/100/120/133/150/166/180MHz
Chip Set Unidentified
Maximum Onboard Memory 128MB (EDO supported)
Maximum Video Memory None
Cache 256/512KB
BIOS AMI
Dimensions 275mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports (2), VRM connector
NPU Options None
CONNECTIONS
Function Label Function Label
Serial port 1 CN1 Reset switch J8 pins 12 & 13
Parallel port CN2 Green PC connector J8 pins 17 & 18
Serial port 2 CN3 IDE interface LED J8 pins 20 & 21
Floppy drive interface CN4 VCC ground connector J8 pins 25 & 26
IDE interface 2 CN5 PS/2 mouse port J11
IDE interface 1 CN6 Chassis fan power JP19
Speaker J8 pins 1 - 4 32-bit PCI slots PC1 - PC3
Power LED & keylock J8 pins 5 - 9 VRM connector VRM
Turbo LED J8 pins 10 & 11
USER CONFIGURABLE SETTINGS
Setting Label Position
» Jumper information unavailable J12 N/A
» Jumper information unavailable J13 N/A

24. » Jumper information unavailable J21A N/A
» Jumper information unavailable JP2 N/A
» CMOS memory normal operation JP4 Open
CMOS memory clear JP4 Closed
Flash BIOS voltage select 5v JP5 Pins 1 & 2 closed
Flash BIOS voltage select 12v JP5 Pins 2 & 3 closed
EPROM installed JP5 Open
Secondary IDE IRQ select IRQ15 JP8 Pins 1 & 2 closed
Secondary IDE IRQ select IRQ through PCI JP8 Pins 2 & 3 closed
» Primary IDE IRQ14 enabled JP9 Closed
Primary IDE IRQ14 disabled JP9 Open
» Jumper information unavailable JP12 N/A
» Jumper information unavailable JP13 N/A
» Factory configured - do not alter JP22 Pins 2 & 3 closed
» Jumper information unavailable JP30 N/A
» Jumper information unavailable JP31 N/A
» Jumper information unavailable JP32 N/A
DRAM CONFIGURATION
Size Bank 0 Bank 1
8MB (2) 1M x 36 None
16MB (2) 2M x 36 None
16MB (2) 1M x 36 (2) 1M x 36
24MB (2) 2M x 36 (2) 1M x 36
24MB (2) 1M x 36 (2) 2M x 36
32MB (2) 4M x 36 None
32MB (2) 2M x 36 (2) 2M x 36
DRAM CONFIGURATION (CON’T)
Size Bank 0 Bank 1
40MB (2) 4M x 36 (2) 1M x 36
40MB (2) 1M x 36 (2) 4M x 36
48MB (2) 4M x 36 (2) 2M x 36
48MB (2) 2M x 36 (2) 4M x 36
64MB (2) 8M x 36 None
64MB (2) 4M x 36 (2) 4M x 36
66MB (2) 8M x 36 (2) 256K x 36
66MB (2) 256K x 36 (2) 8M x 36
68MB (2) 8M x 36 (2) 512K x 36
68MB (2) 512K x 36 (2) 8M x 36
72MB (2) 8M x 36 (2) 1M x 36
72MB (2) 1M x 36 (2) 8M x 36
80MB (2) 8M x 36 (2) 2M x 36
80MB (2) 2M x 36 (2) 8M x 36
96MB (2) 8M x 36 (2) 4M x 36
96MB (2) 4M x 36 (2) 8M x 36
128MB (2) 8M x 36 (2) 8M x 36
Note: Board accepts EDO memory.
CACHE CONFIGURATION
Size Bank 0 Bank 1 TAG
256KB (A) None (2) 32K x 32 None
256KB (B) (8) 32K x 8 None (1) 8K/16K/32K x 8
512KB (A) (8) 64K x 8 None (1) 16K/32K x 8
512KB (B) (8) 64K x 8 None (1) 16K x 8
Note: Board will either have asynchronous or synchronous cache installed.
CACHE JUMPER CONFIGURATION
Size JP10
None Open
256KB (B) (STD/Aster TAG) Open

25. 512KB (A) (STD TAG) Pins 1 & 2 closed
512KB (B) (Aster TAG) Pins 2 & 3 closed
CPU SPEED SELECTION
Speed JP6 JP7 JP15 JP16 JP21
75MHz Open Open Open Open 1 & 2
90MHz Open Closed Open Open 2 & 3
100MHz Closed Closed Open Open 2 & 3
120MHz Open Closed Closed Open 2 & 3
133MHz Closed Closed Closed Open 2 & 3
150MHz Open Closed Closed Closed 2 & 3
166MHz Closed Closed Closed Closed 2 & 3
180MHz Open Closed Open Closed 2 & 3
Note: Pins designated should be in the closed position.
CPU TYPE SELECTION
Type JP20
P54C/CS/CQS/CT Pins 1 & 2, 3 & 4 closed
P55C Open
CPU VOLTAGE SELECTION
Voltage JP27
3.4v Pins 1 & 2 closed
3.5v Pins 2 & 3 closed
SERIAL PORT 2 SELECTION
Setting JP35 JP36
Used as COM2/4 Pins 1 & 2 closed Pins 1 & 2 closed
Used as IR connector Pins 2 & 3 closed Pins 2 & 3 closed

26. TEKRAM TECHNOLOGY CO., LTD.
P5T30-B4
Device Type Mainboard
Processor CX 6X86/CX 686MX/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard Memory 256MB (EDO & SDRAM supported)
Maximum Video Memory None
Cache 256/512KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial ports (2), IR connectors (2), USB
connector
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
Serial port 1 CN1 IR connector J13
Serial port 2 CN2 IDE interface LED J14
Floppy drive interface CN3 Turbo LED J15/pins 2 & 3
Parallel port CN4 Green PC connector J15/pins 4 & 5
IDE interface 2 CN5 Reset switch J15/pins 9 & 10
IDE interface 1 CN6 Power LED & keylock J15/pins 11 – 15
PS/2 mouse interface CN7 Speaker J15/pins 17 - 20
ATX power connector CN8 32-bit PCI slots PC1 – PC4
IR connector IR1 USB connector USB

27. CPU fan power J12
SIMM CONFIGURATION
Size Bank 0 Bank 1
8MB (2) 1M x 36 None
16MB (2) 2M x 36 None
16MB (2) 1M x 36 (2) 1M x 36
24MB (2) 2M x 36 (2) 1M x 36
32MB (2) 4M x 36 None
32MB (2) 2M x 36 (2) 2M x 36
40MB (2) 4M x 36 (2) 1M x 36
48MB (2) 4M x 36 (2) 2M x 36
64MB (2) 8M x 36 None
64MB (2) 4M x 36 (2) 4M x 36
72MB (2) 8M x 36 (2) 1M x 36
80MB (2) 8M x 36 (2) 2M x 36
96MB (2) 8M x 36 (2) 4M x 36
128MB (2) 8M x 36 (2) 8M x 36
128MB (2) 16M x 36 None
136MB (2) 16M x 36 (2) 1M x 36
144MB (2) 16M x 36 (2) 2M x 36
160MB (2) 16M x 36 (2) 4M x 36
192MB (2) 16M x 36 (2) 8M x 36
256MB (2) 16M x 36 (2) 16M x 36
256MB (2) 32M x 36 None
Note: Board accepts EDO memory.
DIMM CONFIGURATION
Size Bank 2 Bank 3
8MB (1) 1M x 64 None
16MB (1) 2M x 64 None
16MB (1) 1M x 64 (1) 1M x 64
24MB (1) 2M x 64 (1) 1M x 64
32MB (1) 4M x 64 None
32MB (1) 2M x 64 (1) 2M x 64
40MB (1) 4M x 64 (1) 1M x 64
48MB (1) 4M x 64 (1) 2M x 64
64MB (1) 8M x 64 None
64MB (1) 4M x 64 (1) 4M x 64
72MB (1) 8M x 64 (1) 1M x 64
80MB (1) 8M x 64 (1) 2M x 64
96MB (1) 8M x 64 (1) 4M x 64
128MB (1) 16M x 64 None
128MB (1) 8M x 64 (1) 8M x 64
136MB (1) 16M x 64 (1) 1M x 64
144MB (1) 16M x 64 (1) 2M x 64
160MB (1) 16M x 64 (1) 4M x 64
192MB (1) 16M x 64 (1) 8M x 64
256MB (1) 16M x 64 (1) 16M x 64
Note: Board accepts SDRAM memory.
CACHE CONFIGURATION
Size Bank 0
256KB (1) 32K x 64
512KB (1) 64K x 64
Note: Some boards may have two cache sockets. The cache is not upgradeable.
CPU SPEED SELECTION (CX 6X86)
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
120MHz 50MHz 2x 2&3 1&2 1&2 2&3 2&3 2&3
133MHz 55MHz 2x 2&3 1&2 1&2 2&3 2&3 1&2

28. 150MHz 60MHz 2x 2&3 1&2 1&2 2&3 1&2 1&2
166MHz 66MHz 2x 2&3 1&2 1&2 1&2 1&2 1&2
200MHz 75MHz 2x 2&3 1&2 1&2 1&2 2&3 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (CX 6X86MX
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
166MHz 60MHz 2.5x 2&3 2&3 1&2 2&3 1&2 1&2
200MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2 1&2
233MHz 75MHz 2.5x 2&3 2&3 1&2 1&2 2&3 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K5)
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
75MHz 50MHz 1.5x 1&2 1&2 1&2 2&3 2&3 2&3
90MHz 60MHz 1.5x 1&2 1&2 1&2 2&3 1&2 1&2
100MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2 1&2
120MHz 60MHz 1.5x 1&2 1&2 1&2 2&3 1&2 1&2
133MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2 1&2
150MHz 60MHz 2.5x 2&3 2&3 1&2 2&3 1&2 1&2
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2 1&2
200MHz 66MHz 3x 1&2 2&3 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K6)
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2 1&2
200MHz 66MHz 3x 1&2 2&3 1&2 1&2 1&2 1&2
233MHz 66MHz 3.5x 1&2 1&2 1&2 1&2 1&2 1&2
266MHz 66MHz 4x 2&3 1&2 2&3 1&2 1&2 1&2
300MHz 66MHz 4.5x 2&3 2&3 2&3 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL)
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
75MHz 50MHz 1.5x 1&2 1&2 1&2 2&3 2&3 2&3
90MHz 60MHz 1.5x 1&2 1&2 1&2 2&3 1&2 1&2
100MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2 1&2
120MHz 60MHz 2x 2&3 1&2 1&2 2&3 1&2 1&2
133MHz 66MHz 2x 2&3 1&2 1&2 1&2 1&2 1&2
150MHz 60MHz 2.5x 2&3 2&3 1&2 2&3 1&2 1&2
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2 1&2
200MHz 66MHz 3x 1&2 2&3 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL MMX)
CPU speed Clock speed Multiplier JBF0 JBF1 JBF2 JFS0 JFS1 JFS2
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2 1&2
200MHz 66MHz 3x 1&2 2&3 1&2 1&2 1&2 1&2
233MHz 66MHz 3.5x 1&2 1&2 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU VOLTAGE SELECTION (SINGLE)
Voltage JP1 JP2
3.3v Pins 1 & 2 closed Pins 7 & 8 closed
3.5v Pins 3 & 4 closed Pins 7 & 8 closed
CPU VOLTAGE SELECTION (DUAL)
Voltage V core JP1 JP2
3.3v 2.1 Pins 1 & 2 closed Pins 1 & 2 closed
3.3v 2.8v Pins 1 & 2 closed Pins 7 & 8 closed
3.3v 2.9v Pins 1 & 2 closed Pins 1 & 2, 7 & 8 closed
3.3v 3.2v Pins 1 & 2 closed Pins 5 & 6, 7 & 8 closed

29. DATAEXPERT CORPORATION
TX531
Device Type Mainboard
Processor CX 6X86/CX 686MX/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed 90/100/120/133/150/166/200/233MHz
Chip Set Acer
Maximum Onboard Memory 256MB (EDO & SDRAM supported)
Cache 512KB
BIOS AMI
Dimensions 250mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports (2), USB connector
CONNECTIONS
Purpose Location Purpose Location
PS/2 mouse port CN1 CPU fan power J9
Serial port 2 CN2 Turbo LED J10
Parallel port CN3 IDE interface LED J11
Floppy drive interface CN4 Reset switch J12
IDE interface 2 CN5 Speaker J13
IDE interface 1 CN6 Power LED & keylock J14
Serial port 1 CN7 USB connector JP1
Green PC connector J8 32-bit PCI slots PC1 – PC4
USER CONFIGURABLE SETTINGS
Function Label Position
» Factory configured - do not alter J3 Unidentified
» CMOS memory normal operation JP2 Open
CMOS memory clear JP2 Closed
» Flash BIOS voltage select 5v JP3 Pins 1 & 2 closed
Flash BIOS voltage select 12v JP3 Pins 2 & 3 closed

30. » Factory configured - do not alter JP5 Unidentified
CPU mode select interleave JP8 Open
CPU mode select burst JP8 Closed
SIMM CONFIGURATION
Size Bank 0 Bank 1
8MB (2) 1M x 36 None
16MB (2) 2M x 36 None
16MB (2) 1M x 36 (2) 1M x 36
24MB (2) 2M x 36 (2) 1M x 36
32MB (2) 4M x 36 None
32MB (2) 2M x 36 (2) 2M x 36
40MB (2) 4M x 36 (2) 1M x 36
48MB (2) 4M x 36 (2) 2M x 36
64MB (2) 8M x 36 None
64MB (2) 4M x 36 (2) 4M x 36
72MB (2) 8M x 36 (2) 1M x 36
80MB (2) 8M x 36 (2) 2M x 36
96MB (2) 8M x 36 (2) 4M x 36
SIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1
128MB (2) 8M x 36 (2) 8M x 36
128MB (2) 16M x 36 None
136MB (2) 16M x 36 (2) 1M x 36
144MB (2) 16M x 36 (2) 2M x 36
160MB (2) 16M x 36 (2) 4M x 36
192MB (2) 16M x 36 (2) 8M x 36
256MB (2) 16M x 36 (2) 16M x 36
Note: Board accepts EDO memory.
DIMM CONFIGURATION
Size Bank 0 Bank 1
8MB (1) 1M x 64 None
16MB (1) 2M x 64 None
16MB (1) 1M x 64 (1) 1M x 64
24MB (1) 2M x 64 (1) 1M x 64
32MB (1) 4M x 64 None
32MB (1) 2M x 64 (1) 2M x 64
40MB (1) 4M x 64 (1) 1M x 64
48MB (1) 4M x 64 (1) 2M x 64
64MB (1) 8M x 64 None
64MB (1) 4M x 64 (1) 4M x 64
72MB (1) 8M x 64 (1) 1M x 64
80MB (1) 8M x 64 (1) 2M x 64
96MB (1) 8M x 64 (1) 4M x 64
128MB (1) 16M x 64 None
128MB (1) 8M x 64 (1) 8M x 64
136MB (1) 16M x 64 (1) 1M x 64
144MB (1) 16M x 64 (1) 2M x 64
160MB (1) 16M x 64 (1) 4M x 64
192MB (1) 16M x 64 (1) 8M x 64
256MB (1) 16M x 64 (1) 16M x 64
Note: Board accepts SDRAM memory.
DIMM VOLTAGE CONFIGURATION
Voltage JP6
3v Pins 5 & 6, 7 & 8 closed
5v Pins 1 & 2, 3 & 4 closed
CACHE CONFIGURATION
Size Bank 0 TAG

31. 512KB (2) 64K x 32 (1) 32K x 8
CPU SPEED SELECTION (CX 6X86)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
133MHz 55MHz 2x On Off Off On On Off
150MHz 60MHz 2x On Off Off On Off Off
166MHz 66MHz 2x On Off Off Off Off Off
200MHz 75MHz 2x On Off Off Off On On
CPU SPEED SELECTION (CX 6X86MX)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
166MHz 66MHz 2.5x On On Off On Off Off
200MHz 66MHz 2.5x On On Off Off Off Off
233MHz 75MHz 2.5x On On Off Off On On
CPU SPEED SELECTION (AM K5)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
90MHz 60MHz 1.5x Off Off Off On Off Off
100MHz 66MHz 1.5x Off Off Off Off Off Off
120MHz 60MHz 1.5x Off Off Off On Off Off
133MHz 66MHz 1.5x Off Off Off Off Off Off
166MHz 66MHz 2.5x On On Off Off Off Off
CPU SPEED SELECTION (AM K6)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
166MHz 66MHz 2.5x On On Off Off Off Off
200MHz 66MHz 3x Off On Off Off Off Off
233MHz 66MHz 3.5x Off Off Off Off Off Off
CPU SPEED SELECTION (INTEL)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
90MHz 60MHz 1.5x Off Off Off On Off Off
100MHz 66MHz 1.5x Off Off Off Off Off Off
120MHz 60MHz 2x On Off Off On Off Off
133MHz 66MHz 2x On Off Off Off Off Off
150MHz 60MHz 2.5x On On Off On Off Off
166MHz 66MHz 2.5x On On Off Off Off Off
200MHz 66MHz 3x Off On Off Off Off Off
CPU SPEED SELECTION (INTEL MMX)
CPU speed Clock speed Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6
166MHz 66MHz 2.5x On On Off Off Off Off
200MHz 66MHz 3x Off On Off Off Off Off
233MHz 66MHz 3.5x Off Off Off Off Off Off

32. KADATCO CO., LTD.
AM-430TX+
Device Type Mainboard
Processor CX 6X86/AM K5/AM K6/Pentium
Processor Speed 90/100/120/133/150/166/180/200/233MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard Memory 256MB (EDO & SDRAM supported)
Maximum Video Memory None
Cache 256/512KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connector
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
Speaker C1 Floppy drive interface CN3
Reset switch C2 Serial port 1 CN4
Green PC connector C3 Serial port 2 CN5
IDE interface LED C4 Parallel port CN6
Chassis fan power C5 USB connector CN7
IR connector C6 PS/2 mouse interface CN8
Power LED & keylock C7 Chassis fan power CN17
IDE interface 1 CN1 32-bit PCI slots PC1 – PC4
IDE interface 2 CN2
USER CONFIGURABLE SETTINGS
Function Label Position
» Factory configured - do not alter JP6 Open

33. » CMOS memory normal operation JP31 Pins 1 & 2 closed
CMOS memory clear JP31 Pins 2 & 3 closed
» Factory configured - do not alter JP32 Unidentified
» Factory configured - do not alter JP36 Unidentified
SIMM CONFIGURATION
Size Bank 0 Bank 1
8MB (2) 1M x 36 None
16MB (2) 2M x 36 None
16MB (2) 1M x 36 (2) 1M x 36
24MB (2) 2M x 36 (2) 1M x 36
32MB (2) 4M x 36 None
32MB (2) 2M x 36 (2) 2M x 36
40MB (2) 4M x 36 (2) 1M x 36
48MB (2) 4M x 36 (2) 2M x 36
64MB (2) 8M x 36 None
64MB (2) 4M x 36 (2) 4M x 36
72MB (2) 8M x 36 (2) 1M x 36
80MB (2) 8M x 36 (2) 2M x 36
96MB (2) 8M x 36 (2) 4M x 36
128MB (2) 8M x 36 (2) 8M x 36
128MB (2) 16M x 36 None
SIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1
136MB (2) 16M x 36 (2) 1M x 36
144MB (2) 16M x 36 (2) 2M x 36
160MB (2) 16M x 36 (2) 4M x 36
192MB (2) 16M x 36 (2) 8M x 36
256MB (2) 16M x 36 (2) 16M x 36
Note: Board accepts EDO memory.
DIMM CONFIGURATION
Size Bank 2 Bank 3
8MB (1) 1M x 64 None
16MB (1) 2M x 64 None
16MB (1) 1M x 64 (1) 1M x 64
24MB (1) 2M x 64 (1) 1M x 64
32MB (1) 4M x 64 None
32MB (1) 2M x 64 (1) 2M x 64
40MB (1) 4M x 64 (1) 1M x 64
48MB (1) 4M x 64 (1) 2M x 64
64MB (1) 8M x 64 None
64MB (1) 4M x 64 (1) 4M x 64
72MB (1) 8M x 64 (1) 1M x 64
80MB (1) 8M x 64 (1) 2M x 64
96MB (1) 8M x 64 (1) 4M x 64
128MB (1) 16M x 64 None
128MB (1) 8M x 64 (1) 8M x 64
136MB (1) 16M x 64 (1) 1M x 64
144MB (1) 16M x 64 (1) 2M x 64
160MB (1) 16M x 64 (1) 4M x 64
192MB (1) 16M x 64 (1) 8M x 64
256MB (1) 16M x 64 (1) 16M x 64
Note: Board accepts SDRAM memory.
DIMM VOLTAGE CONFIGURATION
Voltage JP25 JP26 JP27
3.3v Open Open Open
5v Closed Closed Closed
CACHE CONFIGURATION

34. Note: The location of the cache is unidentified.
CPU SPEED SELECTION (CX 6X86)
CPU speed Clock speed Multiplier JP1 JP2 JP3 JP4 JP5
150MHz 60MHz 2x 1&2 2&3 1&2 1&2 2&3
166MHz 66MHz 2x 1&2 2&3 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K5)
CPU speed Clock speed Multiplier JP1 JP2 JP3 JP4 JP5
90MHz 60MHz 1.5x 1&2 1&2 1&2 1&2 2&3
100MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2
120MHz 60MHz 1.5x 1&2 1&2 1&2 1&2 2&3
133MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2
200MHz 66MHz 3x 2&3 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (AM K6)
CPU speed Clock speed Multiplier JP1 JP2 JP3 JP4 JP5
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2
200MHz 66MHz 3x 2&3 1&2 1&2 1&2 1&2
233MHz 66MHz 3.5x 1&2 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL)
CPU speed Clock speed Multiplier JP1 JP2 JP3 JP4 JP5
90MHz 60MHz 1.5x 1&2 1&2 1&2 1&2 2&3
100MHz 66MHz 1.5x 1&2 1&2 1&2 1&2 1&2
120MHz 60MHz 2x 1&2 2&3 1&2 1&2 2&3
133MHz 66MHz 2x 1&2 2&3 1&2 1&2 1&2
150MHz 60MHz 2.5x 2&3 2&3 1&2 1&2 2&3
166MHz 66MHz 2.5x 2&3 2&3 1&2 1&2 1&2
180MHz 60MHz 3x 2&3 1&2 1&2 1&2 2&3
200MHz 66MHz 3x 2&3 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU SPEED SELECTION (INTEL MMX)
CPU speed Clock speed Multiplier JP1 JP2 JP3 JP4 JP5
200MHz 66MHz 3x 2&3 1&2 1&2 1&2 1&2
233MHz 66MHz 3.5x 1&2 1&2 1&2 1&2 1&2
Note: Pins designated should be in the closed position.
CPU VOLTAGE SELECTION
Voltage V core JP11 JP12 JP13 JP14 JP15 JP16
1.8v 3.3v 1&2 1&2 1&2 1&2 1&2 2&3
2.1v 3.3v 3&4 1&2 1&2 1&2 1&2 2&3
2.5v 3.3v 5&6 1&2 1&2 1&2 1&2 2&3
2.7v 3.3v 7&8 1&2 1&2 1&2 1&2 2&3
2.8v 3.5v 9 & 10 1 & 2 1 & 2 1 & 2 1 & 2 1&2
2.8v 3.3v 9 & 10 1 & 2 1 & 2 1 & 2 1 & 2 2&3
2.9v 3.3v 11 & 12 1 & 2 1 & 2 1 & 2 1 & 2 2&3
2.9v 3.5v 11 & 12 1 & 2 1 & 2 1 & 2 1 & 2 1&2
3.2v 3.5v 13 & 14 1 & 2 1 & 2 1 & 2 1 & 2 1&2
3.3v 3.5v 15 & 16 2 & 3 2 & 3 2 & 3 2 & 3 1&2
3.5v 3.5v 17 & 18 2 & 3 2 & 3 2 & 3 2 & 3 1&2
Note: Pins designated should be in the closed position.

35. INTEL CORPORATION
AL440LX
Processor Pentium II
Processor Speed Unidentified
Chip Set Intel
Video Chip Set None
Maximum Onboard Memory 384MB
Maximum Video Memory None
Cache 512KB
BIOS Intel/Phoenix
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (4), floppy drive interface, game/MIDI port, green PC connector,
IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector,
USB connectors (2), ATX power connector, AGP slot, line in (2), line out,
microphone in
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
ATX power connector ATX Yamaha wavetable connector J6B1
Game/MIDI port CN1 Yamaha wavetable connector J6C1
Microphone in CN2 IDE interface 2 J7H1

36. Line in - external CN3 Wake on ring connector J8A1
Line out CN4 SCSI interface LED J8B1
Serial port 2 CN5 IDE interface 1 J8H1
Serial port 1 CN6 Soft off power supply J8H2/pins 1 & 2
Parallel port CN7 Green PC connector J8H2/pins 3 & 4
USB connector 2 CN8 IR connector J8H2/pins 6 - 11
USB connector 1 CN9 IDE interface LED J8H2/pins 13 - 16
PS/2 mouse port CN10 Power LED J8H2/pins 18 - 20
Wake on LAN connector J1C1 Reset J8H2/pins 22 & 23
Audio in - CD-ROM J1F1 Speaker J8H2/pins 24 - 27
Chassis security J2B1 Floppy drive interface J8K1
Telephony connector J2F1 Chassis fan power J8M1
Line in - internal J2F2 32-bit PCI slots PC1 – PC4
Chassis fan power J3F1 AGP slot SL2
Chassis fan power J5L1
USER CONFIGURABLE SETTINGS
Function Label Position
BIOS normal operation J8B2 Pins 1 & 2 closed
BIOS configuration mode J8B2 Pins 2 & 3 closed
DIMM CONFIGURATION
Size Bank 0 Bank 1 Bank 2
8MB (1) 1M x 64 None None
16MB (1) 2M x 64 None None
16MB (1) 1M x 64 (1) 1M x 64 None
24MB (1) 2M x 64 (1) 1M x 64 None
24MB (1) 1M x 64 (1) 1M x 64 (1) 1M x 64
32MB (1) 4M x 64 None None
32MB (1) 2M x 64 (1) 2M x 64 None
40MB (1) 4M x 64 (1) 1M x 64 None
48MB (1) 4M x 64 (1) 2M x 64 None
48MB (1) 2M x 64 (1) 2M x 64 (1) 2M x 64
64MB (1) 8M x 64 None None
64MB (1) 4M x 64 (1) 4M x 64 None
72MB (1) 8M x 64 (1) 1M x 64 None
80MB (1) 8M x 64 (1) 2M x 64 None
96MB (1) 8M x 64 (1) 4M x 64 None
96MB (1) 4M x 64 (1) 4M x 64 (1) 4M x 64
DIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1 Bank 2
128MB (1) 8M x 64 (1) 8M x 64 None
128MB (1) 16M x 64 None None
192MB (1) 8M x 64 (1) 8M x 64 (1) 8M x 64
256MB (1) 16M x 64 (1) 16M x 64 None
384MB (1) 16M x 64 (1) 16M x 64 (1) 16M x 64
CACHE CONFIGURATION
Note: 512KB cache is located on the Pentium II CPU.

37. QDI COMPUTER, INC.
LEGEND-V
Device Type Mainboard
Processor Pentium II
Processor Speed 233/266/300/333/MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard Memory 768MB (EDO & SDRAM supported)
Maximum Video Memory None
Cache 256/512KB (located on Pentium II CPU)
BIOS Award
Dimensions 305mm x 208mm
I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2),
ATX power connector, AGP slot
NPU Options None
CONNECTIONS
Purpose Location Purpose Location
AGP slot AGP Bake fan power C12
ATX power connector ATX CPU fan power C13

38. Power LED C1 Parallel port CN1
Soft off power supply C2 Serial port 1 CN2
IDE interface LED C3 Serial port 2 CN3
Reset switch C4 USB connector 1 CN4
Speaker C5 USB connector 2 CN5
Turbo LED C6 PS/2 mouse port CN6
Green PC connector C7 Floppy drive interface CN7
IR connector C8 IDE interface 2 CN8
Chassis fan power C9 IDE interface 1 CN9
Chassis security C10 32-bit PCI slots PC1 – PC4
connector
Wake on LAN connector C11
USER CONFIGURABLE SETTINGS
Function Label Position
» CMOS memory normal operation JP6 Pins 2 & 3 closed
CMOS memory clear JP6 Pins 1 & 2 closed
DIMM CONFIGURATION DIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1 Bank 2 Size Bank 0 Bank 1 Bank 2
8MB (1) 1M x 64 None None 160MB (1) 16M x 64 (1) 4M x 64 None
16MB (1) 1M x 64 (1) 1M x 64 None 192MB (1) 16M x 64 (1) 4M x 64 (1) 4M x 64
16MB (1) 2M x 64 None None 192MB (1) 16M x 64 (1) 8M x 64 None
24MB (1) 1M x 64 (1) 1M x 64 (1) 1M x 64 192MB (1) 8M x 64 (1) 8M x 64 (1) 8M x 64
32MB (1) 2M x 64 (1) 2M x 64 None 256MB (1) 16M x 64 (1) 8M x 64 (1) 8M x 64
32MB (1) 4M x 64 None None 256MB (1) 16M x 64 (1) 16M x 64 None
48MB (1) 2M x 64 (1) 2M x 64 (1) 2M x 64 256MB (1) 32M x 64 None None
64MB (1) 4M x 64 (1) 4M x 64 None 264MB (1) 32M x 64 (1) 1M x 64 None
64MB (1) 8M x 64 None None 272MB (1) 32M x 64 (1) 1M x 64 (1) 1M x 64
96MB (1) 4M x 64 (1) 4M x 64 (1) 4M x 64 272MB (1) 32M x 64 (1) 2M x 64 None
128MB (1) 8M x 64 (1) 8M x 64 None 288MB (1) 32M x 64 (1) 2M x 64 (1) 2M x 64
128MB (1) 16M x 64 None None 288MB (1) 32M x 64 (1) 4M x 64 None
164MB (1) 16M x 64 (1) 1M x 64 None 320MB (1) 32M x 64 (1) 4M x 64 (1) 4M x 64
144MB (1) 16M x 64 (1) 1M x 64 (1) 1M x 64 320MB (1) 32M x 64 (1) 8M x 64 None
144MB (1) 16M x 64 (1) 2M x 64 None 384MB (1) 32M x 64 (1) 8M x 64 (1) 8M x 64
160MB (1) 16M x 64 (1) 2M x 64 (1) 2M x 64 384MB (1) 32M x 64 (1) 16M x 64 None
CACHE CONFIGURATION 384MB (1) 16M x 64 (1) 16M x 64 (1) 16M x 64
Note: 256KB/512KB cache is located on the Pentium II CPU. 512MB (1) 32M x 64 (1) 16M x 64 (1) 16M x 64
512MB (1) 32M x 64 (1) 32M x 64 None
768MB (1) 32M x 64 (1) 32M x 64 (1) 32M x 64
Note: Board accepts EDO & SDRAM
memory. Maximum EDO is 768MB.
Maximum SDRAM is 384MB.

39. BCM ADVANCED RESEARCH, INC.
QS440BX
Device Type Mainboard
Processor Pentium II
Processor Speed 233/266/300/333/350/400/450MHz
Chip Set Intel 440BX
Video Chip Set None
Maximum Onboard Memory 384MB (EDO & SDRAM supported)
Maximum Video Memory None
Cache 512KB (located on Pentium II CPU)
BIOS Award
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (5), floppy drive interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2),
ATX power connector, AGP slot, SB-link connector, wake on LAN connector
CONNECTIONS
Purpose Location Purpose Location
AGP slot AGP PS/2 mouse port CN6
ATX power connector ATX IDE interface 1 J14
SB-link connector C1 IDE interface 2 J18
Wake on LAN connector C2 Floppy drive interface J19

40. Chassis fan power C3 Speaker J20
Power LED & keylock C4 Reset switch J21
CPU fan power C5 Power LED J22
Parallel port CN1 IDE interface LED J23
Serial port 2 CN2 IR connector J24
Serial port 1 CN3 Green PC connector J25
USB connector 2 CN4 Soft off power supply J26
USB connector 1 CN5 32-bit PCI slots PC1 – PC5
USER CONFIGURABLE SETTINGS
Function Label Position
» Factory configured - do not alter J1 Unidentified
» Factory configured - do not alter J2 Unidentified
DIMM CONFIGURATION
Size Bank 0 Bank 1 Bank 2
8MB (1) 1M x 64 None None
16MB (1) 2M x 64 None None
16MB (1) 1M x 64 (1) 1M x 64 None
24MB (1) 2M x 64 (1) 1M x 64 None
24MB (1) 1M x 64 (1) 1M x 64 (1) 1M x 64
32MB (1) 4M x 64 None None
32MB (1) 2M x 64 (1) 1M x 64 (1) 1M x 64
32MB (1) 2M x 64 (1) 2M x 64 None
40MB (1) 4M x 64 (1) 1M x 64 None
40MB (1) 2M x 64 (1) 2M x 64 (1) 1M x 64
48MB (1) 4M x 64 (1) 1M x 64 (1) 1M x 64
48MB (1) 4M x 64 (1) 2M x 64 None
48MB (1) 2M x 64 (1) 2M x 64 (1) 2M x 64
56MB (1) 4M x 64 (1) 2M x 64 (1) 1M x 64
DIMM CONFIGURATION (CON’T)
Size Bank 0 Bank 1 Bank 2
64MB (1) 8M x 64 None None
64MB (1) 4M x 64 (1) 2M x 64 (1) 2M x 64
64MB (1) 4M x 64 (1) 4M x 64 None
72MB (1) 8M x 64 (1) 1M x 64 None
72MB (1) 4M x 64 (1) 4M x 64 (1) 1M x 64
80MB (1) 8M x 64 (1) 1M x 64 (1) 1M x 64
80MB (1) 8M x 64 (1) 2M x 64 None
80MB (1) 4M x 64 (1) 4M x 64 (1) 2M x 64
88MB (1) 8M x 64 (1) 2M x 64 (1) 1M x 64
96MB (1) 8M x 64 (1) 2M x 64 (1) 2M x 64
96MB (1) 8M x 64 (1) 4M x 64 None
96MB (1) 4M x 64 (1) 4M x 64 (1) 4M x 64
104MB (1) 8M x 64 (1) 4M x 64 (1) 1M x 64
112MB (1) 8M x 64 (1) 4M x 64 (1) 2M x 64
128MB (1) 16M x 64 None None
128MB (1) 8M x 64 (1) 4M x 64 (1) 4M x 64
128MB (1) 8M x 64 (1) 8M x 64 None
136MB (1) 16M x 64 (1) 1M x 64 None
136MB (1) 8M x 64 (1) 8M x 64 (1) 1M x 64
144MB (1) 16M x 64 (1) 1M x 64 (1) 1M x 64
144MB (1) 16M x 64 (1) 2M x 64 None
144MB (1) 8M x 64 (1) 8M x 64 (1) 2M x 64
152MB (1) 16M x 64 (1) 2M x 64 (1) 1M x 64
160MB (1) 16M x 64 (1) 2M x 64 (1) 2M x 64
160MB (1) 16M x 64 (1) 4M x 64 None
160MB (1) 8M x 64 (1) 8M x 64 (1) 4M x 64
168MB (1) 16M x 64 (1) 4M x 64 (1) 1M x 64
176MB (1) 16M x 64 (1) 4M x 64 (1) 2M x 64

41. 192MB (1) 16M x 64 (1) 4M x 64 (1) 4M x 64
192MB (1) 8M x 64 (1) 8M x 64 (1) 8M x 64
200MB (1) 16M x 64 (1) 8M x 64 (1) 1M x 64
208MB (1) 16M x 64 (1) 8M x 64 (1) 2M x 64
224MB (1) 16M x 64 (1) 8M x 64 (1) 4M x 64
256MB (1) 16M x 64 (1) 8M x 64 (1) 8M x 64
384MB (1) 16M x 64 (1) 16M x 64 (1) 16M x 64
Note: Board accepts EDO & SDRAM memory.
CACHE CONFIGURATION
Note: 512KB cache is located on the Pentium II CPU.
CPU SPEED SELECTION
CPU speed Clock speed Multiplier JP2/ JP2/ JP2/ JP2/
pins 1 & 2 pins 3 & 4 pins 5 & 6 pins 7 & 8
233MHz 66MHz 3.5x Open Closed Open Closed
266MHz 66MHz 4x Closed Open Closed Closed
300MHz 66MHz 4.5x Closed Open Open Closed
300MHz 100MHz 3x Open Closed Closed Closed
333MHz 66MHz 5x Open Open Closed Closed
350MHz 100MHz 3.5x Open Closed Open Closed
400MHz 100MHz 4x Closed Open Closed Closed
450MHz 100MHz 4.5x Closed Open Open Closed