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@mw308 mw308 commented Oct 8, 2025

Summary

Add the Abit AH4T and remove DX4 support from the AH4. The AH4T ROM also fixes the mis-reporting of the DX2's 66MHz speed (shows as 63MHz using the AH4 ROM).

Checklist

  • Closes #xxx
  • I have tested my changes locally and validated that the functionality works as intended
  • I have discussed this with core contributors already
  • This pull request requires changes to the ROM set

References

https://theretroweb.com/motherboards/s/abit-ab-ah4t#docs
https://theretroweb.com/motherboard/manual/abit-ah4t-5eed256ec63a1218220774.pdf (page 2-7)
Real AH4T PC

Testing

Tested and compared with a real AH4T
Windows 3.1 and Windows 95 tested
AH4 shows expected CPU list in Settings

@mw308 mw308 changed the title Ah4t Add Abit AH4T Oct 8, 2025
@mw308 mw308 mentioned this pull request Oct 8, 2025
3 tasks
@OBattler OBattler merged commit 9077501 into 86Box:master Oct 8, 2025
45 checks passed
@mw308 mw308 deleted the ah4t branch January 15, 2026 13:16
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2 participants