42 tagged z80, measured the same way as everything else here.
Browse within: assembler 40c-compiler 40sdcc 40z180 40z88dk 40
Skill Claude CodeCodex
Intel 8085 assembly for z88dk: Zilog mnemonics, full opcode map (flags K/V, timings), and extended-instruction usage. Strong rule: stack-only locals and intermediates; static/BSS only for cross-call state. Prefer when writing or reviewing 8085 library asm, mapping Intel↔Zilog, choosing stack frames, K-flag loops…
Skill Claude CodeCodex
Game Boy CPU (LR35902 / gbz80) for z88dk: Zilog mnemonics, full opcode map (flags ZNHC, timings), GB-only ops (ldh, (hl+)/(hl-), ld hl,sp+, add sp,, swap, stop, reti), and z80asm synthetics. Use when writing or reviewing gbz80 library asm, +gb / -mgbz80 paths, mapping Nintendo↔Zilog, or /cpu-gbz80.
Skill Claude CodeCodex
How to measure and prove z88dk library changes: z88dk-ticks TIMER/hotspots, map/nm proof, suite gates, A/B library swaps, math32 multi-CPU rebuilds, classic +test benchmarks, wiki number paste rules. Use when optimising, explaining deltas, or running +test -clib=8085 benches.
Skill Claude CodeCodex
Debug and trace Sega Master System, Game Gear, and SG-1000 games using the Gearsystem emulator MCP server. Provides workflows for Z80 CPU debugging, breakpoint management, VDP/PSG/YM2413 hardware inspection, disassembly analysis, execution tracing, and rewind/time-travel debugging. Use when the user wants to debug an…
Skill Claude CodeCodex
Hack, modify, and translate Sega Master System, Game Gear, and SG-1000 ROMs using the Gearsystem emulator MCP server. Provides workflows for memory searching, value discovery, cheat creation, data modification, sprite/text finding, translation patching, and rewind-assisted experimentation. Use when the user wants to…