14 Jul
2005
14 Jul
'05
1:07 p.m.
Hello all,
I have two "true-blue" IBM ATs, both the early motherboard revision.
I have the following questions:
- Is it possible to use an IDE hard drive instead of MFM? I have
tried several different drive/controller combos, and nothing works so
far :-( . The drives are small ( < 100 MB), so it's not a geometry
issue (at least, I don't think so :-) )
- Is anyone running an early rev. AT with an IDE drive? How did you do it? :-)
- I Google'd a bit, and someone mentioned not only upgraded disk-based
setup programs, but also upgrade BIOSes for the AT. Does anyone have
an upgraded setup disk or BIOS that they'd be willing to copy for me?
Thanks all!
Rich B.
14 Jul
14 Jul
3:46 p.m.
Hello all,
I have two "true-blue" IBM ATs, both the early motherboard revision.
I have the following questions:
- Is it possible to use an IDE hard drive instead of MFM? I have
tried several different drive/controller combos, and nothing works so
far :-( . The drives are small ( < 100 MB), so it's not a geometry
issue (at least, I don't think so :-) )
- Is anyone running an early rev. AT with an IDE drive? How did you do it? :-)
Alas I am running a later motherboard version here (8MHz clock), but I
had no problems plugging in a combined floppy and IDE hard disk controller
card and linking it to an IDE drive.
There were 2 things I did to get it 'right' although neither were
essential. One was to overlay the top 8K of the system ROMs with EPROMs
(this was a minor motherboard mod) so I could have a more suitable
geometry. The other was to add a kludgeboard (a few TTL chips) to the IDE
controller to operate the drive-in-use LED on the front of the machine.
The IDE drive I used didn't have an obvious output for this.
The IDE interface was designed to be software-compatible with the IBM
PC/AT hard disk controller card, so there shouldn't be problems. Note I
said 'shouldn't', not 'won't'. What exactly happens when you
replace the
MFM controller with the IDE one?
-tony
7103
days inactive
7103
days old
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ard＠p850ug1.demon.co.uk -
richard.beaudry＠gmail.com