ISA bus throughput

[Doc Shipley]

mbbrutman-cctalk at brutman.com wrote:

> And one last question ..  Unlike the PC and XT, the AT BIOS handles hard drives.
>  It didn't blink when I removed the crusty WD based controller and replaced it
> with a no-name WinBond based controller.  Does the new IDE controller really
> look that much like the old controller that the BIOS can't tell?

   Well, consider the IDE hack for the PC/RT.  As long as the IDE disk 
honors all the ESDI commands (translate as "if it's a Seagate Medalist 
<2GB"), you can replace the FDC/ESDI adapter in an IBM PC/RT with an 
FDC/IDE card and the system firmware doesn't even notice.


	Doc