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I2C/SMBus overhaul #1110

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merged 16 commits into from Nov 25, 2020
Merged

I2C/SMBus overhaul #1110

merged 16 commits into from Nov 25, 2020

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richardg867
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@richardg867 richardg867 commented Nov 21, 2020 •
edited

  • Rework SMBus I2C device API, adding support for multiple buses and improving flexibility
  • Add bit-bang I2C host controller (i2c_gpio) for:
    • DDC on Voodoo Banshee/3, S3 Trio, S3 ViRGE, Cirrus Logic GD5434+ and ATI Mach64
      • Matrox Mystique is implemented but broken on Windows (unconventional I2C communication method)
    • NVRAM on NCR SCSI
    • "SMBus" (I2C over ACPI GPIO) on VIA VT82C586B
  • Add VIA VT82C686B SMBus host controller (PIIX4 with additional protocols)
  • Add generic 24Cxx EEPROM emulation (up to 8 MB) for SPD, DDC and NCR NVRAM
  • Bonus: fix legacy CPU table for EuroPC (closes #1112)

@richardg867 richardg867 marked this pull request as ready for review Nov 22, 2020
@OBattler OBattler merged commit 39043ff into 86Box:master Nov 25, 2020
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Successfully merging this pull request may close these issues.

Emulator crashes when saving settings if EuroPC or Tandy 1000/1000 HX are selected
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@richardg867 @OBattler