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0.2.1

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@640-KB 640-KB released this 05 Dec 18:57
· 140 commits to main since this release
v0.2.1
bd142d6

Version 0.2.1 Release - 12/05/22

Version 0.2.1 contains minor updates and fixes.

  • Fixed a keyboard issue with Multi-Floppy BIOS 2.2 configuration when adding a drive.
  • EMM Homebrew 8088 keyboard fix, mini boot loader for CH37X v0.52 image.
  • Numerous inline documentation and byte optimization updates.

Please send any hardware/software or compatibility reports or feedback to 640kb@glabios.org.

ROM standard builds

Build Download Desc
Standard Turbo 8088 Supports Turbo (standard Ctrl-Alt-+ speed switching), all CPUs, best choice for most systems.
Standard Turbo V20 Supports Turbo and uses V20 enhanced instructions where possible. Will not run on 808x CPUs.
5160 8088, V20 Best for standard 4.77MHz XT/5160 or clone PCs.
5150 8088, V20 Supports cassette, 5150 motherboard, 640 KiB memory and option ROMs.

Alternate platforms

Build Download Desc
86Box / Emulator 8088, V20 Performance optimized for 86Box, PCem, PCE/ibmpc. Will not run on real hardware.
FE2010A 8088, V20 Faraday FE2010A chipset (Headstart Plus/Vendex 33-XT/PC-10 and others).
ST-12 8088, V20 ST-12/UNIQUE TD3300A chipset (port 90h Turbo control).
EMM Homebrew 8088 8088, V20/V40 EMM Homebrew supports 8088 or V20/V40.

Notes

E/EPROM notes

The BIOS image is 8K (same as the original PC, XT v1 and most clones). If your motherboard has an 8K ROM socket and you're using a larger E/EPROM it may be necessary to write the image repeated multiple times to work with the unused address lines.

If your motherboard uses a 16K or 32K ROM, the image will need to either be written multiple times or to the last 8K block in the E/EPROM.

ROM BASIC: If your motherboard uses a 32K ROM with BASIC ROM at 0xF600 you can extract the top 24K of U18 and write that into the new 32K ROM's 0x0000-0x5FFF space, with the GLaBIOS code starting at relative offset 0x6000.

Special Builds

  • WD 1002x-WX1/WX2 MFM hard drive controllers (ROM versions 62-000043-0xx known affected) have bugs that affect the ROM POST screen display of hard disk geometry and sizes requiring those be disabled. If you use one of those, build with POST_HD_CHECK = 0 to work around or email 640kb@glabios.org for a custom build.
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