6502/65C02 CPU emulator, TMS9918 VDP emulator, Character/graphics LCD emulator

[visrealm]

Hi all.

Have been working on a few emulation projects to support my 6502 on a backplane (HBC-56) emulator.

They're all written in C99, have no dependencies, open source (MIT license). You might find them useful for your own retro computer emulation projects.

Cheers
Troy

6502/65C02 CPU emulator

• Support for standard 6502, 65C02, WDC65C02 and R65C02.
• All WDC and Rockwell-specific instructions.
• Correct handling of Decimal mode.
• Accurate instruction timing.
• User-supplied I/O callbacks.
• IRQ and NMI signals.
• Multiple CPU instances.
• Instruction disassembler.
• Passes all Klaus Dormann 6502/65C02 tests.

GitHub link: github.com/visrealm/vrEmu6502
Character / graphics LCD emulator

• Supports 1, 2 and 4 row character LCDs.
• 128x64 graphics LCD support.
• Built-in WASM build with HTML5 renderer.

GitHub link: github.com/visrealm/vrEmuLcd



TMS9918/TMS9918A VDP emulator

• Supports all documented modes
• Graphics I (including sprites).
• Graphics II (including sprites).
• Multicolor mode (including sprites).
• Text mode.
• 16KB VRAM.
• 5th sprite.
• Sprite collisions.
• VSYNC interrupt.
• Individual scanline rendering.
• Supports beam-racing effects.

GitHub link: github.com/visrealm/vrEmuTms9918