Hallo Christopher, > [Someone else said:] That was ME :) > > > Some centuries ago there existed PC's which had a BIOS which didn't > know of > > > the existance of harddisk at all. Then came the AT with some > preprogrammed > > > types. The one you mean is type 4: 620 tracks, 4 heads, 17 sectors. > Those > > One of the "features" of the XT over the original PC was the addition > of hard disk support to the BIOS. Nope. The PC was equiped with two 360 KB drives. The PC was equiped with an harddisk. But the the software was found in a ROM in the area starting from $C800:0 to $F000:0 (or $E000:0? 10 years ago I knew for sure). I still have one of these original IBM HD-controllers. > (To another someone else: all PC's have BIOS, but not all have the SETUP > program in ROM.) The so called SETUP can be start up in debug with "G=C800:5" (or 6, depends on factory) Groetjes, Ruud http://Ruud.C64.org/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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