本文へ移動
cccskills
無料GitHub で公開

msx-memory-map-audit

Validate MSX memory mapping in EMULATORS, including 16 KB pages, primary slot selection through PPI port

Commnets/EMULATORS
インストール方法を見る

含まれるファイル（3）

  • SKILL.md2.8 KB
  • agents/openai.yaml239 B
  • references/memory-map.md6.8 KB

SKILL.md（原文）

インストールする前に、エージェントに与えられる指示の中身を確認できます。

MSX Memory Map Audit

Core Workflow

Use this skill to audit whether EMULATORS presents the same CPU-visible memory as a real MSX slot system.

  1. Read references/memory-map.md before making claims or edits.
  2. Inspect the relevant implementation paths first:
    • include/MSX/Memory.hpp, src/MSX/Memory.cpp
    • include/MSX/Model.hpp, src/MSX/Model.cpp
    • include/MSX/PPI8255.hpp, src/MSX/PPI8255.cpp
    • include/MSX/PPI8255Registers.hpp, src/MSX/PPI8255Registers.cpp
    • include/MSX/PortManager.hpp, src/MSX/PortManager.cpp
    • include/MSX/MSX.hpp, src/MSX/MSX.cpp
    • emulators/MSXEmulator*/bios/*.rom
  3. When changing C++ code, also use $emulators-framework-cpp-style.
  4. Separate primary slot selection, secondary slot selection, and mapper segment selection. They are related but not interchangeable.
  5. For findings, cite the address page, selected primary slot, selected secondary slot if expanded, expected storage, and the class or method that violates it.

Audit Priorities

Prioritize correctness in this order:

  • #A8 primary slot register bit-pair decode for all four 16 KB pages.
  • Expanded slot support: per-primary-slot subslot registers, #FFFF access only through selected page 3, and inverted readback.
  • BIOS slot ID handling for RDSLT, WRSLT, CALSLT, ENASLT, RSLREG, and WSLREG compatibility.
  • Correct placement of BIOS, BASIC, cartridges, RAM, and empty slots by model.
  • Preservation/restoration of page 3 when code accesses a secondary slot register.
  • Memory mapper ports #FC-#FF, write-only/unreliable read behavior, and per-mapper segment copies.
  • Empty/open slot behavior documented and consistent across read/write paths.

Validation Hints

Prefer narrow address-decoder tests:

  • Write/read #A8 and verify each page maps the intended primary slot.
  • For each expanded slot, select its primary in page 3, write #FFFF, read back the complemented value, and verify all four pages use the right subslot.
  • Verify BIOS slot routines keep interrupts/page selection safe enough for the boot ROM.
  • If mapper RAM exists, write distinct bytes into segments through #FC-#FF and check aliasing/repetition.

For emulator-level checks, compare with the BIOS ROMs in emulators/MSXEmulator*/bios and use small Z80 programs before relying on large cartridges.

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

ログインしてレビューを書く

同じリポジトリのスキル

概要と使いどころ

c64-1541-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

c64-cia-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

c64-memory-map-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

c64-mps801-printer-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

c64-mps802-printer-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

c64-sid-audit

無料

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.

日本語の概要は準備中です。原文の説明を表示しています。

Commnets/EMULATORS102026年10月9日 更新

Commnets のスキルをすべて見る

このスキルの問題を報告する