RTL - SIMH

1. -SIMH multi-systemSIMH multi-system
simulatorsimulator
[RTL][RTL]

2. Real Time Clock
GRI-909/GRI-99 Simulator Usage
name size comments
RDY 1 device ready flag
IENB 1 interrupt enable flag
TIME 24 clock interval
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3. Interval Timer (CLK)
IBM 7090/7094 Simulator Usage
The timer (CLK) implements a 60Hz interval timer.
It is disabled by default.
The timer has the following registers:
➲ name size comments
➲ TRAP 1 interval timer trap flag TIME 24
tick delay
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4. Real Time Clock
SDS 940 Simulator Usage
The real-time clock (RTC) frequency can be adjusted as follows:
SET RTC 60HZ set frequency to 60Hz SET RTC 50HZ set
frequency to 50Hz
The default is 60Hz.
The clock implements these registers:

name size comments

PIE 1 interrupt enable TIME 24 tick interval
The real-time clock autocalibrates; the clock interval is adjusted up
or down so that the clock tracks actual elapsed time
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5. IBM 7090/7094 Simulator Usage
Interval Timer (CLK)
The timer (CLK) implements a 60Hz interval timer.
It is disabled by default.
The timer has the following registers:
name size comments
TRAP 1 interval timer trap flag
TIME 24 tick delay
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6. PDP-1D Timesharing Clock (CLK)
PDP-1 Simulator Usage
The PDP-1D implements a timesharing clock, which operates at 1Khz. The clock
has a readable counter and generates interrupts at 32 ms and 1 minute intervals.
There is no other visible state. The clock is disabled by default.
The clock implements these registers:

name size comments

CNTR 16 clock counter, range 0-5999910
The clock requires the 16-channel sequence break system and is assigned to two
different SBS levels:

SET CLK SBS32MS=n assign 32 msec interrupt to SBS level n SET CLK
SBS1MIN=n assign 1 minute interrupt to SBS level n
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7. Interdata 16b/32b Simulator Usage
Line Frequency Clock (LFC)
-
The line frequency clock (LFC) frequency can be adjusted as follows:
SET LFC 60HZ set frequency to 60Hz SET LFC 50HZ set frequency to
50Hz
The default is 60Hz.
The line frequency clock implements these registers:
name size comments
IREQ 1 clock interrupt request IENB 1 clock interrupt enable IARM 1
clock interrupt armed TIME 24 clock frequency
The line frequency clock autocalibrates; the clock interval is adjusted up or
down so that the clock tracks actual elapsed time.

8. HP2100 Simulator Usage
Time Base Generator (TBG)
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The time base generator (TBG) may be set for diagnostic
mode:
SET TBG DIAG configure for diagnostic mode
SET TBG CALIBRATED configure for calibrated timing mode
Diagnostic mode corresponds to setting jumper W2 to position
"B.” This turns off autocalibration and divides the longest
time intervals down by 1000.

9. HP2100 Simulator Usage
Time Base Generator (TBG)
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Diagnostic mode corresponds to setting jumper W2 to position "B.”
This turns off autocalibration and divides the longest time
intervals down by 1000.
The time base generator implements these registers:
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10. The real-time clock (RTC) line frequency can be adjusted as
follows:
SET RTC 60HZ set line frequency to 60Hz
SET RTC 50HZ set line frequency to 50Hz
The default is 60Hz.
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Nova Simulator Usage
Time Base Generator (TBG)

11. The real-time clock autocalibrates;
the clock interval is adjusted up or down so that the clock
tracks actual elapsed time.
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Nova Simulator Usage
Time Base Generator (TBG)

12. The real time clock (CLK) frequency can be adjusted as
follows:
SET CLK 60HZ set frequency to 60Hz
SET CLK 50HZ set frequency to 50Hz
The default is 60Hz.
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H316 Simulator Usage
Real Time Clock (CLK)

13. The real time clock (CLK) frequency can be adjusted as
follows:
SET CLK 60HZ set frequency to 60Hz
SET CLK 50HZ set frequency to 50Hz
The default is 60Hz.
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H316 Simulator Usage
Real Time Clock (CLK)

14. -
H316 Simulator Usage
Real Time Clock (CLK)
The clock implements these registers:
The real-time clock autocalibrates; the clock interval is adjusted up
or down so that the clock tracks actual elapsed time.