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c64-cia-audit

Validate Commodore 64 CIA 6526 emulation in EMULATORS, including CIA1/CIA2 $DC00/$DD00 register behavior, ports, DDRs, keyboard/joystick matrix, IEC/user port, VIC bank selection, timers A/B, underflow timing, PB toggle/pulse output, TOD clock/alarm, serial shift register, FLAG, ICR masks and IRQ/NMI lines. Use when Codex reviews or edits C64 CIA, timers, ports, keyboard, joystick, serial bus, interrupts, TOD, or VIC bank control.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS

설치 방법 보기

포함된 파일(3)

SKILL.md2.8 KB
agents/openai.yaml211 B
references/cia.md4.7 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

C64 CIA Audit

When compiling, testing, or executing on Windows, use $emulators-windows-build-runtime.

Core Workflow

Use this skill to audit whether the two C64 CIA chips behave like 6526 devices in their C64 wiring context.

Read references/cia.md before making claims or edits.
Inspect the local implementation paths first:
- include/COMMODORE/CIA/CIA.hpp, src/COMMODORE/CIA/CIA.cpp
- include/COMMODORE/CIA/CIARegisters.hpp, src/COMMODORE/CIA/CIARegisters.cpp
- include/COMMODORE/CIA/CIATimer.hpp, src/COMMODORE/CIA/CIATimer.cpp
- include/COMMODORE/CIA/CIAClock.hpp, src/COMMODORE/CIA/CIAClock.cpp
- include/COMMODORE/CIA/CIASerialPort.hpp, src/COMMODORE/CIA/CIASerialPort.cpp
- include/C64/CIA1*, src/C64/CIA1*, include/C64/CIA2*, src/C64/CIA2*
- include/C64/SerialPort.hpp, src/C64/SerialPort.cpp
When changing C++ code, also use $emulators-framework-cpp-style.
Separate generic 6526 behavior from C64-specific wiring. CIA1 and CIA2 are the same chip but expose different system effects.
For each finding, identify the exact register, bit, read/write side effect, interrupt line, and expected cycle/timer consequence.

Audit Priorities

Prioritize correctness in this order:

Port read/write and DDR behavior, including active-low keyboard/joystick/IEC lines.
CIA1 wiring: keyboard matrix, joystick ports, paddles/control port selection, datasette FLAG, and IRQ output.
CIA2 wiring: VIC bank selection on PA0/PA1, IEC/user-port/RS-232 lines, and NMI output.
Timer A/B latch/counter load behavior, underflow reload, one-shot/continuous mode, force-load, CNT counting, and Timer B count sources.
ICR read-clear behavior and bit 7 set/clear mask semantics.
TOD BCD clock, alarm selection, 50/60 Hz selection, halt/latch behavior, and AM/PM bit.
Serial shift register and FLAG edge semantics.

Validation Hints

Useful local assets:

docs/C64Data/CIA1Logic.xlsx
emulators/C64Programs/Code/Macros/MCIAS.asm
emulators/C64Programs/Code/Tests/TESTCIA1.asm
emulators/C64Programs/Code/Tests/TESTCIA1IRQ.asm
emulators/C64Programs/Code/Tests/TESTCIA2NMI.asm
emulators/C64Programs/Code/Tests/TESTKEYBOARD.asm
emulators/C64Programs/Code/Tests/TESTKEYBOARDIRQ.asm

Timer regressions are easiest to catch with minimal assembly programs that count IRQ/NMI firings or observe PB6/PB7 transitions.

리뷰

아직 리뷰가 없습니다. 사용해 본 소감을 남겨 주세요.

로그인 없이 쓸 수 있습니다. 사용 후기, 질문, 작동하지 않은 환경 등을 편하게 남겨 주세요.

아직 댓글이 없습니다. 첫 댓글을 남겨 보세요.

같은 저장소의 스킬

c64-1541-audit

무료

Validate Commodore 1540/1541/1541C/1541-II compatible disk-drive behavior in EMULATORS, including IEC serial bus protocol, device numbers, KERNAL traps, CBM DOS commands/status, D64 image parsing, BAM/directory/file chains, PETSCII filenames, 6502 drive CPU/ROM/RAM expectations, 6522 VIA wiring, GCR/track/sector geometry, motor/head timing, and compatibility boundaries for 1541-like devices. Use when Codex reviews or edits C64, VIC-20, C264, COMMODORE disk, serial I/O, D64, CBM DOS, IEC, VIA, GCR, or 1541 drive code.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

c64-memory-map-audit

무료

Validate Commodore 64 memory map, PLA/bank switching, 6510 port $0000/$0001 behavior, VIC bank selection, color RAM, ROM/RAM overlays, cartridge mapping, and mirrored I/O in the EMULATORS C64 namespace. Use when Codex reviews or edits C64 memory, PLA, CPU-visible address decoding, VIC-visible memory, color memory, char ROM, cartridge, expansion I/O, or mapped chip register behavior.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

c64-mps801-printer-audit

무료

Validate Commodore MPS-801 serial dot matrix printer behavior in EMULATORS, including SerialPrinterMPS801 classes and their MatrixPrinterEmulation and SerialPrinterPeripheralSimulation hierarchy, IEC/KERNAL-trap printer routing, device numbers, secondary addresses, PETSCII/character sets, 6x7 glyphs, double width, graphics mode, reverse field, tab and dot positioning, line/page geometry, PostScript output, and fidelity boundaries. Use when Codex reviews or edits COMMODORE MPS801 printer code, generated printer output, PostScript printer templates, C64/VIC-20/C264 serial-printer behavior, or compares implementation against .codex/docs/MPS801.pdf and historical MPS-801 sources.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

c64-mps802-printer-audit

무료

Validate Commodore MPS-802 and 1526 serial dot matrix printer behavior in EMULATORS, including SerialPrinterMPS802 classes and their MatrixPrinterEmulation and SerialPrinterPeripheralSimulation hierarchy, IEC/KERNAL-trap printer routing, device numbers, secondary-address functions, PETSCII/character sets, 8x8 glyphs, enhanced width, reverse and paging modes, formatter strings, programmable characters, line/page geometry, PostScript output, and fidelity boundaries. Use when Codex reviews or edits COMMODORE MPS802 printer code, generated printer output, PostScript printer templates, C64/VIC-20/C264 serial-printer behavior, or compares implementation against .codex/docs/MPS802.pdf, the MPS-802 user guide, and 1526/MPS-802/4023 service information.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

c64-sid-audit

무료

Validate Commodore 64 SID 6581/8580 sound emulation in EMULATORS, including $D400-$D7FF register decoding, voices, frequency, pulse width, control bits, ADSR/envelope behavior, oscillator sync/ring/noise/test, filters, volume DAC/sample clicks, paddles, read-only registers, mirrors, and reSID integration. Use when Codex reviews or edits SID, Sound, audio wrapper, register, filter, waveform, envelope, or mapped SID behavior.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

c64-vicii-audit

무료

Validate Commodore 64 VIC-II emulation in EMULATORS, including $D000-$D3FF register behavior, PAL/NTSC timing, raster counters, badlines, BA/AEC bus stealing, video matrix and bitmap fetches, sprites, collisions, borders, IRQs, color RAM usage, and display modes. Use when Codex reviews or edits VICII, Screen, Memory/PLA, raster, sprite, video, or cycle-level behavior for C64 classes.

한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.

Commnets/EMULATORS102026년 10월 18일 업데이트

Commnets의 스킬 모두 보기

이 스킬의 문제 신고

설치

명령으로 설치

npx skills add https://github.com/Commnets/EMULATORS --skill c64-cia-audit

터미널에 붙여 넣고 실행합니다(Node.js 필요). Claude Code, Codex 등 설치할 에이전트를 고를 수 있습니다.

에이전트에게 부탁하기

다음 Agent Skill을 설치해 주세요.
https://github.com/Commnets/EMULATORS/tree/master/.codex/skills/c64-cia-audit

먼저 SKILL.md와 첨부 파일의 내용을 확인해 수상한 처리(외부 전송, 인증 정보 읽기 등)가 없는지 확인한 뒤 Claude Code는 ~/.claude/skills/c64-cia-audit/, Codex는 ~/.agents/skills/c64-cia-audit/ 에 배치해 주세요.

이 문장을 그대로 Claude Code나 Codex에 보내면 내용을 확인한 뒤 설치해 줍니다.

GitHub에서 소스 보기

저장소: Commnets/EMULATORS
스타: 10
포크: 0
카테고리: 테스트·보안
라이선스: GPL-3.0
원문 언어: 영어
최종 업데이트: 2026년 10월 18일

스킬은 에이전트를 위한 지시와 스크립트의 묶음입니다. cccskills는 내용의 안전성을 보증하지 않습니다. 설치하기 전에 내용을 확인하세요.