Downloaded 10 times
Uploaded byIgnacio Sánchez Ginés
8-bit Emulator Programming with Go
The document discusses the implementation of an emulator using Golang, focusing on various CPU architectures like 6502 and Z80. It covers concepts such as legal ROM usage, dynamic recompilation, and the emulator's core loop for executing game code. Additional details include memory mapping and the emulator's ability to handle graphics and audio input for different gaming systems.
More Related Content
![SMP Implementation for OpenBSD/sgi [Japanese Edition]](https://cdn.slidesharecdn.com/ss_thumbnails/cbugapr232010-100423110217-phpapp01-thumbnail.jpg?width=640&height=640&fit=bounds)
8-bit Emulator Programming with Go
- 1.
- 2. Emulator = legal ROM= ilegal
- 3.
- 4. Interpreter LD A,(HL) SUB 1 JRC,CONTINUE CP B JR NZ,LOOP Decode Read Exec
- 5. Binary Translation Target Machine Code LD A,(HL) SUB1 JR C,CONTINUE CP B JR NZ,LOOP
- 6. Dynamic Recompilation Trans Read Exec LD A,(HL) SUB1 JR C,CONTINUE CP B JR NZ,LOOP Target Machine Code
- 7.
- 8. CPU 6502 Z80 Game Boy* Master System Game Gear MSX ZX Spectrum NES Atari 2600 Commodore 64 Apple 2 Super NES 65816
- 9.
- 10.
- 11.
- 12. Main Loop while true{ updateCPU() updateVideo() updateInput() updateAudio() }
- 13. updateCPU() { opcode =fetchOpcode() runOpcode(opcode) }
- 14. 100 clks Nclks CPU Video Input
- 15.
- 16. CPU H L B CD E SPPC A F 16 bit 8 bit
- 17. Flags 0 0H C0 0Z N 1 05 4 3 27 6
- 18. 16 KB ROMBank 0 16 KB switchable ROM bank 8 KB Video RAM 8 KB switchable RAM bank 8 KB internal RAM Mirror 8 KB internal RAM Sprite Memory (OAM) Empty IO Ports Empty Internal RAM Interrupt Register cartridge FF4C FF80 FEA0 FF00 FFFF FE00 E000 C000 A000 8000 4000 0000 cartridge
- 19.
- 20. 16 KB ROMBank 0 16 KB switchable ROM bank 8000 4000 0000
- 21. Bank 0 Bank 1 Bank2 Bank 3 Bank 4 ... fixed 00000 04000 08000 0C000 10000 14000 switchable Bank 4
- 22.
- 24.
- 25.
- 26. Workshop go get -ugithub.com/drhelius/demo-emulator cd $GOPATH/src/github.com/drhelius go run main.go -rom workshop.rom