FS: IBM PS/2 Model 70-386 (25 mhz) procesor boards

From: jpero_at_cgocable.net <(jpero_at_cgocable.net)>
Date: Sun Feb 21 10:51:00 1999

Date sent: Sun, 21 Feb 1999 00:51:15
Send reply to: classiccmp_at_u.washington.edu
From: Joe <rigdonj_at_intellistar.net>
To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
Subject: Re: FS: IBM PS/2 Model 70-386 (25 mhz) procesor boards

> Russ,
>
> Will the boards work in a P70? If so I'd like to get one.
>
> Joe

(!!)

I wish that it does but this is not possible!

Those 4 little daughter boards plugs into T3 motherboards only and
that motherboard accepts 486DX 25 platform. That it. T1 and T2
motherboards have no "processor daughterboard" slot, only has 3
simm slots and cacheless and comes in 16 and 20mhz.

Aside; I have a Everex Step 386 33 with that cool diagnostic
display how that works as I wanted to use it with stuffed with PII
stuff in that case (Saving the former guts). Got all the pinout and
programmings examples from Everex site but how that works in
interfacing at hardware level to where?

Those cached 386dx w/ 387 25 daughterboard theorically perform
less than half of a straight 486DX 33 in performance wise. Not bad.
Anyone have ran the checkit 3.0 on those types?

I have AST premium bravo (came with 486DX 33 16MB from one of
rescue runs from a high school who got full truckload of all kinds
nothing interesting other than what I found before they finally threw
out 2 weeks ago. Whew, grabbed some before they are all gone!),
series (EISA with CPUID slots and another CPUID with ISA
motherboard) 486 on EISA ran like real 486DX 33 (16,000) without
L2 cache (yuk) and on another, 386dx 33 with 387, 64K cache ran
around 9,000 on checkit. Contrast to 486dx 25 performed about
11,000.

If anyone have seen AST components which I need for my bravo;
P5 60/66 or 90 (with or no P5 90 CPU is ok) CPUID card, "2 HD on
a rail" steel bracket that 2 HD's mounted on the its side, bracket
length is around same length of a full length ISA card and straddles
into 4 plastic standoffs molded into bottom case (it's all plastic!),
held in place by 3 screws. When fully configured with drives that
small case can hold 5 drives.

(I do have P5 66 CPU if anyone happens to have a CPUID card
without CPU and willing to give away or for little cash so that
computer will have P5 66 instead of cachless 486.)

I do have the AST part numbers if you need them to know which is
right ones that I wanted.

Thanks!

Wizard
Received on Sun Feb 21 1999 - 10:51:00 GMT