RELOC133
Relocates the Promise Ultra133 TX2 controller's DMA buffer from low (<640k) to high memory. Since this is located adjacent to the EBDA, it moves that to high memory too. Enjoy your full 640 KB of free memory!
Assembling
fasm reloc133.asm
Using
Add the following line to your fdconfig.sys or equivalent:
INSTALL=C:\PATH\TO\RELOC133.COM
Caveats
- This program is entirely experimental. It messes with the internal workings of your storage controller. Use at your own risk.
- Warm-booting (skipping the BIOS routines) will no longer work. In fact, this could be extremely dangerous.
- Updating the DMA pointers involves writing to shadow-RAM, which is a chipset-specific procedure. This program is written and tested to work with Intel 440BX (PIIX) chipsets only. It may happen to work on other chipsets too, I don't know (and don't particularly care).
License
GPLv3.