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ti99sim - RetroBIOS
Type standalone
Source https://github.com/christianhaitian/ti99sim
Upstream https://www.mrousseau.org/programs/ti99sim/
Version 0.16.0
Profiled 2026-03-29
Cores ti99sim
Systems ti99
Technical notes

Marc Rousseau's TI-99/4A simulator (since 1993). Standalone only, no libretro port. Uses proprietary .ctg cartridge format for ROM packaging (CPU ROM + GROMs + RAM config). Raw ROM dumps must be converted to .ctg via the convert-ctg utility. File search order: CWD, CWD/console/ (v0.16.0) or CWD/roms/ (<=0.0.11), ~/.ti99sim/console/, /opt/ti99sim/console/. v0.16.0 adds SHA1-based auto-discovery for device ROMs in the console/ directory. Recalbox packages ti99sim as a standalone emulator for the ti994a system.

6 files | 1 required, 5 optional | 6 in repo, 0 missing | 1 with HLE fallback

TI-994A.ctg required in repo
Console ROM cartridge containing CPU ROMs, system GROMs, and RAM configuration

  • SHA1: 0264512c7d9e...
  • Source: src/core/ti994a.cpp:122-131 (v0.16.0), src/sdl/main.cpp:407-411 (v0.0.11)
  • Platforms: recalbox
  • SHA1 is of .ctg format. v0.16.0 also recognizes console v2.2 (sha1 16e275faae427465ba4dd4c2bf8569f6546d32dd).

spchrom.bin optional in repo HLE fallback
TMS5220/TMS6100 Speech Synthesizer vocabulary ROM

  • Size: 32.0 KB
  • Validation: size
  • Source: src/core/tms5220.cpp:190-213 (v0.16.0), src/core/tms5220.cpp:194-213 (v0.0.11)
  • Platforms: recalbox
  • Raw binary, not .ctg format. Must be exactly 32768 bytes. First byte must be 0xAA. Falls back to empty speech ROM if missing or invalid.

ti-disk.ctg optional in repo
TI Disk Controller DSR ROM (CRU >1100)

  • SHA1: ed91d48c1eaa...
  • Source: src/core/device-support.cpp:52 (v0.16.0), src/sdl/main.cpp:452-476 (v0.0.11)
  • Platforms: recalbox
  • SHA1 is of .ctg format. Disk emulation disabled without this file.

Gram Kracker.ctg optional in repo
Miller Graphics Gram Kracker ROM manipulation peripheral

  • SHA1: a3bd5257c63e...
  • Source: src/core/ti994a-gk.cpp:56 (v0.16.0), src/sdl/ti994a-sdl.cpp:78 (v0.0.11)
  • SHA1 is of .ctg format. Gram Kracker features disabled without this file.

ti-pcard.ctg optional in repo
TI P-Code Card (UCSD Pascal) DSR ROM

  • SHA1: 27aceb956262...
  • Source: src/core/device-support.cpp:53 (v0.16.0)
  • SHA1 is of .ctg format. v0.16.0+ only.

cf7+.ctg optional in repo
CF7+/nanoPEB CompactFlash interface DSR ROM

  • SHA1: 4d26e5ef0997...
  • Source: src/core/device-support.cpp:51 (v0.16.0)
  • SHA1 is of .ctg format. v0.16.0+ only.

Generated on 2026-04-03T20:37:39Z