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xm6typeg - RetroBIOS
Type standalone
Classification Enhanced forks
Source http://retropc.net/pi/xm6/index.html
Upstream closed-source
Version 3.38
Profiled 2026-08-10
Cores xm6typeg, XM6TYPEG, XM6TYPEG-WINDOWS
Systems sharp-x68000
Based on XM6 v2.06 by PI.
Technical notes

Closed-source Windows fork of XM6 v2.06, extended by GIMONS from 2010 and maintained again by PI. since version 3.34 (xm6g.pdf p.1, p.3). Distributed from PI's XM6 page as a single archive, xm6_typeg_338_20260223.zip, holding an x64 xm6g.exe, the Visual C++ 2015-2019 runtime it imports (mfc140u.dll, msvcp140.dll, vcruntime140.dll, vcruntime140_1.dll) and the 32-page manual xm6g.pdf. No source is published; the analysis below reads xm6g.exe, and the XM6 v2.06 sources cited alongside are PI's own release, xm6_206s.zip from the same page. ES-DE launches it through the XM6TYPEG and XM6TYPEG-WINDOWS find rules with the working directory set to the emulator folder, on Linux under Wine or Proton. The archive alone does not run: the manual opens with that warning (xm6g.pdf p.5).

Machines emulated are X68000, XVI, Compact, X68030 and the 040turbo and 060turbo accelerator configurations (xm6g.pdf p.3). System files are resolved beside xm6g.exe. A twenty-entry name table at xm6g.exe:0x140592350 holds them, against ten in Filepath::SystemFile[] (XM6 2.06 vm/filepath.cpp:472-483), and each path is built by copying the name, splitting it, and refilling drive and directory from GetModuleFileNameW, the sequence XM6 2.06 spells out in Filepath::SysFile and Filepath::SetBaseDir (vm/filepath.cpp:88-105, 172-186). The path is rebuilt from the module path on every load, with no configured directory taking part. Loading reads a fixed byte count and compares it against the count returned, so every min_size below is a floor: a longer file loads and its tail is ignored.

Two files are mandatory. LoadROM (xm6g.exe:0x1404fc9a5) leaves through its failure exit when the IPL read fails, and the CG read falls back to CGROM.TMP before failing the same way, which is the string "XM6 requires two ROM files, IPLROM.DAT file and CGROM.DAT(or CGROM.TMP) file." Nothing in the executable substitutes for either. The system options page probes IPLROM.DAT, IPLROMXV.DAT, IPLROMCO.DAT and IPLROM30.DAT with GetFileSizeEx and accepts a file only at exactly 131072 bytes (xm6g.exe:0x140428f80, size test at 0x14042920a).

XM6 Utility, published separately at the same address, synthesises CGROM.TMP from the installed Windows fonts and SCSIINROM.DAT or SCSIEXROM.DAT from the Human68k version 3.02 disk image HUMAN302.XDF, which it requires at 0x134000 bytes (XM6Util scsirom.cpp:86-90). It stamps the SCSI ROMs with "XM6 " at offset 0x1ff8 and a version at 0x1ffc (XM6Util scsirom.cpp:243-245), and xm6g.exe reads both files back and tests that signature (xm6g.exe:0x14050147c, 0x1405015e0) to raise the startup warning that names these files as substitutes and discourages them. Nothing rejects the file, and no genuine ROM is hashed anywhere in the executable.

SCSI ROM requirements follow the machine (xm6g.pdf p.17). SCSIINROM.DAT is needed by SUPER, XVI and Compact and by any machine set to the internal SCSI interface; SCSIEXROM.DAT drives the CZ-6BS1 external board, which is the only SCSI variant the SASI models can take. X68030 needs neither, its SCSI ROM being part of IPLROM30.DAT or IPLROM30S.DAT. IPLROM30S.DAT and ROM30S.DAT are a pair used only when Expansion ROM is enabled on the X68030 options tab, for ROMs patched for 060turbo (xm6g.pdf p.17).

The Mercury Unit carries an OPN (YMF288) whose rhythm section is sampled from external files. The fmgen and X68Sound engines read six WAV files named from a table at xm6g.exe:0x1405c0090 (0x1404ed610, CreateFileW at 0x1404ed8bf); the ymfm engine reads ym2608_adpcm_rom.bin instead (0x140574fec, ReadFile at 0x140575095), which is why the rhythm level control is documented as inert for ymfm.

xm6g.ini and the state file STATE.XM6, the twentieth table entry, are written by the program and are not listed below. RTC.DAT and the SRAM files are listed because they are battery-backed images with hardware counterparts that preload settings when supplied, even though XM6 TypeG creates them on exit when they are absent (xm6g.pdf p.18).

30 files | 2 required, 28 optional | 18 in repo, 12 missing

IPLROM.DAT required in repo
X68000 boot ROM version 1.0, base models

  • System: sharp-x68000
  • Size: 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x1404fc9a5, xm6g.exe:0x14042920a, XM6 2.06 vm/memory.cpp:249-270
  • Covers the first model, ACE, EXPERT, PRO and SUPER. LoadROM reads 0x20000 bytes and fails when fewer are returned, and the failure aborts initialisation. The startup warning naming version 1.00 (05/07/1987) as recommended only advises; it does not reject the file. The recommended source is the free X68BIOSE.LZH package (xm6g.pdf p.6).

IPLROMXV.DAT optional in repo
X68000 XVI boot ROM version 1.1

  • System: sharp-x68000
  • Size: 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x14042927c, XM6 2.06 vm/memory.cpp:256-258
  • Selects the XVI machine, which also needs SCSIINROM.DAT. The options page offers the machine only when this file is exactly 131072 bytes.

IPLROMCO.DAT optional in repo
X68000 Compact boot ROM version 1.2

  • System: sharp-x68000
  • Size: 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x14042946b, XM6 2.06 vm/memory.cpp:259-261
  • Selects the Compact machine, which also needs SCSIINROM.DAT. Same exact size test as the other IPL ROMs.

IPLROM30.DAT optional in repo
X68030 boot ROM version 1.3, $FE0000-$FFFFFF half

  • System: sharp-x68000
  • Size: 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x14042965a, XM6 2.06 vm/memory.cpp:262-264
  • Upper half of the X68030 and X68030 Compact boot ROM, paired with ROM30.DAT. It carries the SCSI ROM for those machines, so neither SCSIINROM.DAT nor SCSIEXROM.DAT applies to them.

ROM30.DAT optional in repo
X68030 boot ROM version 1.3, $FC0000-$FDFFFF half

  • System: sharp-x68000
  • Size: min 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x1404fd1f8, XM6 2.06 vm/memory.cpp:311-313, XM6 2.06 vm/memory.cpp:328-335
  • Lower half of the X68030 boot ROM, loaded through the SCSI ROM slot and the only one of those read at 0x20000 bytes rather than 0x2000. Without it the X68030 machine does not load.

IPLROM30S.DAT optional missing
Expansion boot ROM, $FE0000-$FEFFFF

  • System: sharp-x68000
  • Size: min 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16-17, xm6g.exe:0x140592350 index 4
  • Read in place of IPLROM30.DAT when Expansion ROM is checked on the X68030 options tab, the setting stored as EXTROM. Paired with ROM30S.DAT and intended for ROMs patched for 060turbo.

ROM30S.DAT optional missing
Expansion boot ROM, lower half

  • System: sharp-x68000
  • Size: min 128.0 KB
  • Validation: size
  • Source: xm6g.pdf p.16, xm6g.exe:0x1404fd201
  • The other half of the expansion pair, loaded through the same SCSI ROM slot as ROM30.DAT and read at the same size.

CGROM.DAT required in repo
X68000 character generator ROM

  • System: sharp-x68000
  • Size: min 768.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17-18, xm6g.exe:0x1404fcf11, XM6 2.06 vm/memory.cpp:283-289
  • Supplies the glyphs the X68000 renders, mapped at $F00000-$FBFFFF. Used by the base models and as the fallback for every machine whose own CG ROM is absent. Initialisation fails when neither this file nor CGROM.TMP loads.

CGROMXV.DAT optional missing
X68000 XVI character generator ROM

  • System: sharp-x68000
  • Size: min 768.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17-18, xm6g.exe:0x1404fcd99
  • Preferred when the XVI machine is selected. CGROM.DAT is used when it is missing.

CGROMCO.DAT optional missing
X68000 Compact character generator ROM

  • System: sharp-x68000
  • Size: min 768.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17-18, xm6g.exe:0x1404fcdac
  • Preferred when the Compact machine is selected, with the same fallback to CGROM.DAT.

CGROM30.DAT optional missing
X68030 character generator ROM

  • System: sharp-x68000
  • Size: min 768.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17-18, xm6g.exe:0x1404fcc36
  • Preferred when X68030 or X68030 Compact is selected, with the same fallback to CGROM.DAT.

CGROM.TMP optional in repo
Synthesised font ROM, fallback when no CG ROM is present

  • System: sharp-x68000
  • Size: min 768.0 KB
  • Validation: size
  • Source: xm6g.pdf p.18, p.6, xm6g.exe:0x1404fd041, XM6 2.06 vm/memory.cpp:286-289
  • Read at the same size, only after CGROM.DAT fails. XM6 Utility builds it from the fonts installed on the machine that generated it, so no hash is declared. XM6 TypeG treats it as non-recommended and raises a suppressible startup warning whenever it is in use.

SCSIINROM.DAT optional in repo
Internal SCSI interface ROM, SUPER and later

  • System: sharp-x68000
  • Size: min 8.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17, xm6g.exe:0x1404fd1ef, XM6 2.06 vm/memory.cpp:305-310, XM6 2.06 vm/memory.cpp:328-345
  • Size options: 8.0 KB, 128.0 KB
  • Required by SUPER, XVI and Compact, and by any machine whose SCSI interface option is set to internal, that option defaulting to none. The loader tries 0x20000 bytes first and falls back to 0x2000. A copy carrying "XM6 " at offset 0x1ff8 was synthesised by XM6 Utility and raises the startup warning.

SCSIEXROM.DAT optional missing
External SCSI interface ROM, CZ-6BS1 board

  • System: sharp-x68000
  • Size: min 8.0 KB
  • Validation: size
  • Source: xm6g.pdf p.17, xm6g.exe:0x1404fd20a, XM6 2.06 vm/memory.cpp:316-318, XM6 2.06 vm/memory.cpp:341-352
  • Size options: 8.0 KB, 8.0 KB, 128.0 KB
  • Drives the CZ-6BS1 board, the only SCSI variant the first model, ACE, EXPERT and PRO can take, and mutually exclusive with the internal interface everywhere else. After 0x20000 and 0x2000 the loader retries at 0x1fe0 bytes into buffer offset 0x20, the WinX68k high-speed layout, so 8160 is the real floor.

SRAM.DAT optional in repo
SRAM image for EXPERT and the other base models

  • System: sharp-x68000
  • Source: xm6g.pdf p.18, xm6g.exe:0x140592350 index 14, XM6 2.06 vm/sram.cpp:70-81, XM6 2.06 vm/sram.cpp:112
  • Size options: 16.0 KB, 64.0 KB
  • Holds the boot device and memory switch settings for the first model, ACE, EXPERT, PRO and SUPER. A supplied image preloads those settings. The standard capacity is the 16 KB X68000 SRAM; the SRAM64K modification the emulator reproduces raises it to 64 KB. No size is enforced.

SRAMXVI.DAT optional missing
SRAM image for XVI

  • System: sharp-x68000
  • Source: xm6g.pdf p.18, xm6g.exe:0x140592350 index 15
  • Size options: 16.0 KB, 64.0 KB
  • Per-model SRAM introduced by XM6 TypeG, which keeps one image per machine instead of the single SRAM.DAT of XM6 v2.06.

SRAMCMP.DAT optional missing
SRAM image for Compact

  • System: sharp-x68000
  • Source: xm6g.pdf p.18, xm6g.exe:0x140592350 index 16
  • Size options: 16.0 KB, 64.0 KB
  • Read when the Compact machine is selected.

SRAM030.DAT optional missing
SRAM image for X68030, 040turbo and 060turbo

  • System: sharp-x68000
  • Source: xm6g.pdf p.18, xm6g.exe:0x140592350 index 17
  • Size options: 16.0 KB, 64.0 KB
  • Shared by X68030, X68030 Compact and the 040turbo and 060turbo configurations.

RTC.DAT optional missing
RTC alarm settings for timer start

  • System: sharp-x68000
  • Source: xm6g.pdf p.18, xm6g.exe:0x140592350 index 18
  • Alarm registers of the battery-backed clock, used by the timer start feature and applying to every machine. XM6 TypeG creates it on exit when it is absent.

ym2608_adpcm_rom.bin optional in repo
YM2608 ADPCM-A rhythm ROM, ymfm engine

  • System: sharp-x68000
  • Source: xm6g.exe:0x140574eb0
  • Rhythm source for the Mercury Unit OPN when the FM engine is set to ymfm. The name is appended to a directory and the file is read whole; when it is absent the rhythm section stays silent and the emulator runs.

2608_BD.WAV optional in repo
Mercury Unit rhythm sample, bass drum

  • System: sharp-x68000
  • Source: xm6g.exe:0x1404ed610, name table 0x1405c0090, CreateFileW at 0x1404ed8bf
  • Platforms: lakka, retroarch, retrodeck, retropie
  • One of the six rhythm samples the fmgen and X68Sound engines read for the Mercury Unit OPN. The name is built as 2608_ plus the table entry plus .WAV. A missing file is handled through ERROR_FILE_NOT_FOUND and leaves that instrument silent.

2608_SD.WAV optional in repo
Mercury Unit rhythm sample, snare drum

2608_TOP.WAV optional in repo
Mercury Unit rhythm sample, top cymbal

2608_HH.WAV optional in repo
Mercury Unit rhythm sample, hi-hat

2608_TOM.WAV optional in repo
Mercury Unit rhythm sample, tom-tom

2608_RIM.WAV optional in repo
Mercury Unit rhythm sample, rim shot

  • System: sharp-x68000
  • Aliases: 2608_RYM.WAV
  • Source: xm6g.exe:0x1404ed610, name table 0x1405c0090, 0x1404ed808-0x1404ed841
  • Platforms: lakka, retroarch, retrodeck, retropie
  • Last of the six. This entry alone has a second accepted name, 2608_RYM.WAV, the spelling carried by widely circulated sample sets.

X68Sound.dll optional in repo
FM synthesis engine by m_puusan

  • System: sharp-x68000
  • Source: xm6g.pdf p.29, p.31, xm6g.exe:LoadLibraryW at 0x140488dfb
  • One of the three FM engines the sound options offer, alongside the built-in fmgen and ymfm. Not shipped in the archive; without it that engine cannot be selected.

c86ctl.dll optional in repo
Control library for external OPM hardware

  • System: sharp-x68000
  • Source: xm6g.exe:0x1404b2da6, version query at 0x1404b2daa
  • Loaded by name to drive a real YM2151 through a C86BOX class device instead of software synthesis. The executable reads its file version before use.

pcidebug.dll optional missing
PCI access library used by the debug interface

  • System: sharp-x68000
  • Source: xm6g.exe:LoadLibraryW at 0x1404fa344, FreeLibrary at 0x1404fa2f5
  • Loaded on demand and freed again. Absent, the feature that needs it is unavailable and the emulator continues.

SOUND Canvas VA.dll optional missing
Roland Sound Canvas VA plugin used as MIDI output

  • Path: %ProgramFiles%/Roland/Sound Canvas VA/SOUND Canvas VA.dll
  • System: sharp-x68000
  • Source: xm6g.exe:0x14048418a, INI key VstSCVA
  • Hosted as the MIDI output device when the VSTi option is selected. The path is fixed to the Roland installation directory and the setting is stored as VstSCVA.

Generated on 2026-08-23T16:12:06Z