16 Jun
2006
16 Jun
'06
6:05 p.m.
On 6/16/2006 at 6:52 PM Nico de Jong wrote:
The experiments were made a necessity, as I had to read
some funny CP/M
disks, and it showed that the BIOS's embedded in newer systems (I'm now
speaking of 486/50's etc) could not read 180 KB and 160 KB disks anymore,
not to speak of 8" disks.
I think it's more like the BIOSes can, but their CMOS setup programs don't
know the first thing about anything about older drives. I suspect that the
DPB for any drive can be modified even in a modern PC to step at any rate
the FDC is capable of. I've got some old Micropolis 100 tpi 5.25' drives
that require a full 30 msec. track-to-track.
Cheers,
Chuck