Shows what happens with cutting back on coffee. What follows is my Non-Programmer's view of what would be good for development and testing.
YMWD [Your Mileage WILL differ]
Let's go back to the initial question: a 486 for NT kernel driver debug.
Add in a desire for a desktop.
I must admit having my consciousness warped by your struggles with the
7-6 and conflated that with needing to be able to bring up an RS/6000
adapter in this desktop.
Is the "NT kernel driver" for the NT system, or is it for an adapter?
My desire from the start has been to identify a system that is "stock
IBM", by that, we know where the ROMs will be loaded and what I/O
addresses will be used.
To make that unholy desire understandable, MAJ Tom has painfully probed
some systems, and noticed that the POST code does a "rough POST" that
goes right for the sweet spot - it looks at memory locations and I/O
that are used by IBM manufactured adapters and devices. This even edges
out POSID, a fact that was utterly alien to me.
So, if starting out with a bunch of unknowns, I would shy away from
non-IBM kit for developing the early versions. Bermuda, stock IBM.
Lacuna, S3 928 video [ever set up video under 9x and noticed the extra
I/O addresses? ] and IDE [what O/S expect to find IDE on MCA ?].
Further, later adapters and system devices use an 8K NVRAM. Think of
systems that can use a Corvette. Those systems have 8K. So no 70s or 80s.
9577 is relatively spacious. A 90, not so at all.
9577 Bermuda, max 32MB FPM, 90 can do 64MB [8x8MB] or up to 256MB if you
can findt the uncommon 32MB ECC SIMMs.
9577 Bermuda can swap out video, XGA, XGA-2, Short 1MB... 90, on-board
XGA, not the cleanest co-existence with other video. IMHO, much better co-existence than with the S3 928, but... If you can fix the issue NT
has with vga256.dll and enable 800x600x64k on NT, then you have done well.
What would I think would be a REAL stock IBM system? A Model 95 with the
single serial / single parallel planar. No surprises there. Mix n match
video and SCSI, allows you to build the initial version, then swap up to
test the next version.
486 complex? Hmm. To test IML capability, a 486DX50 upgrade, with the
enhanced complex BIOS. Lorenzo might have some left. Keeping within the
Type 1, a 486DX2-66 upgrade [Flash], followed by a non-SOD K [IML], both complexi with a DX4 / Turbochip.
In addition, the 95 has the slots cut into the case for RS/6000 sized
adapters, think of the Passplay. You can easily run 64MB of FPM with
8x8MB SIMMs.
I gave my last 8595 to Kevin a few years ago. Can't help you with one.
Ryan Alswede wrote:
Looking for a PS/2 workstation that has a 486 so it can run NT for kernel driver debug.
What models should I be looking for? If anybody has one in their basement I don't mind paying shipping.
Thanks.
--- SoupGate-Win32 v1.05
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