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Super PC/Turbo XT BIOS 3.1

AuthorPlasma (Jon Ρetrosky and Ya'akov Miles)
Emailplasma@phatcode.net
Websitehttp://www.phatcode.net/
ReleasedOct 28 2017
PlatformAll
LanguageAssembly (IDEAL)
SourceYes
BinariesYes
Summary

The Super PC/Turbo XT BIOS is heavily modified version of the widely-distributed "(c) Anonymous Generic Turbo XT" BIOS. It is a drop-in replacement for the IBM 5150/5155/5160 BIOS and most XT clones, including 8/10 MHz turbo systems.

Besides fixing several bugs from the Generic BIOS, many additional features have been added, including CPU/FPU detection, fast memory checking, UMB initialization, expansion ROMs in the F000-FE00 region, ROM BASIC boot option, 101-key enhanced keyboard support, and more.

All the tools required to modify and build the BIOS in are included, in DOS, Windows, or Linux.

Version 3.1 Changes:


Bug Fixes

  • IBM 5150 PC config switches corrected (previously had problems with CGA and/or FPU)
  • 40-column CGA boot fixed


Changed

  • Int 10h/ah=0 ignores invalid video modes


 

Downloads

Click the filename to download the file.

Name Size Filename
Super PC/Turbo XT BIOS 3.1 1.9 mb pcxtbios31.zip
Super PC/Turbo XT BIOS 3.0 1.9 mb pcxtbios30.zip
Super PC/Turbo XT BIOS 2.6 650 kb pcxtbios26.zip
Super PC/Turbo XT BIOS 2.5 641 kb pcxtbios25.zip
Super PC/Turbo XT BIOS 2.4 640 kb pcxtbios24.zip
Super PC/Turbo XT BIOS 2.3 639 kb pcxtbios23.zip
Super PC/Turbo XT BIOS 2.2 645 kb pcxtbios22.zip
Super PC/Turbo XT BIOS 2.1 612 kb pcxtbios21.zip
Turbo XT BIOS 2.0 646 kb xtbios2.zip
 
 

Screenshots

Click to see the full image.

 
Boot screen with 8088 and MDA
 
Boot screen with V20 and CGA
 
Boot screen with V20 and VGA