2 Nov
1998
2 Nov
'98
4:21 p.m.
The PS/2 Model 30=286 didn't have a cable going to the riser card in it,
nor was it an MCA machine. It was an ISA machine, and The HD plugged into
the motherboard via ribbon cable. I'm not even sure if it was an ESDI
drive. I think it was just an MFM that had everything (including power) on
one cable.
-Jason
***********************************************
* Jason Willgruber *
* (roblwill(a)usaor.net) *
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----------
From: John Rollins <rexstout(a)uswest.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Subject: RE: Classic != IBM AT
Date: Monday, November 02, 1998 8:26 PM
Hmm.. Would the 486 system I had a while back count? I forget who made
it,
model A3000. 486DX/33 AMD CPU and FPU and some other
chips were on a
small
daughterboard that fit into a slot in the front of the
computer, which
interfaced to an MCA slot... Now that's gotta be wierd for anything.
Closest thing to that I can think of is the hard drives IBM used in some
PS/2's that interfaced directly to the MCA bus(interface built in to the
drive's controller board with a cable going to the MCA riser card in the
Model 30-286 and maybe the 55sx too). That 486 was fun, wish I still had
it... :-|
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2 Nov
2 Nov
12:43 a.m.
The PS/2 line wasn't microchannel until you went into the model 50 and higher
numbered models, and all the machines were plug in bus, no cabled busses. The
ISA versions had a HDD controller on them but it would auto disable when
another stock type controller was plugged into a card slot. We run a 30-286 on
the toekn ring network where I work as a disk type workstation that also has an
external 5.25" floppy drive and it works great. I'm trying to talk them into
swapping it out for a 386 machine though.
Jason Willgruber wrote:
The PS/2 Model 30=286 didn't have a cable going to
the riser card in it,
nor was it an MCA machine. It was an ISA machine, and The HD plugged into
the motherboard via ribbon cable. I'm not even sure if it was an ESDI
drive. I think it was just an MFM that had everything (including power) on
one cable.
-Jason
***********************************************
* Jason Willgruber *
* (roblwill(a)usaor.net) *
* *
* http://members.tripod.com/general_1 *
* ICQ#-1730318 *
* /0\/0\ *
* > Long Live the 5170! *
* \___/ *
************************************************
----------
From: John Rollins <rexstout(a)uswest.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Subject: RE: Classic != IBM AT
Date: Monday, November 02, 1998 8:26 PM
Hmm.. Would the 486 system I had a while back count? I forget who made
it,
model A3000. 486DX/33 AMD CPU and FPU and some
other chips were on a
small
> daughterboard that fit into a slot in the front of the computer, which
> interfaced to an MCA slot... Now that's gotta be wierd for anything.
> Closest thing to that I can think of is the hard drives IBM used in some
> PS/2's that interfaced directly to the MCA bus(interface built in to the
> drive's controller board with a cable going to the MCA riser card in the
> Model 30-286 and maybe the 55sx too). That 486 was fun, wish I still had
> it... :-|
>
> --------------------------------------------------------------
> | http://members.tripod.com/~jrollins/index.html - Computers |
> | http://www.geocities.com/Area51/Lair/1681/ - Star Trek |
> | orham(a)qth.net list admin KD7BCY |
> | ham-mac(a)qth.net Portland, OR |
> --------------------------------------------------------------
>
> 
5:35 p.m.
The PS/2 Model 30=286 didn't have a cable going to
the riser card in it,
nor was it an MCA machine. It was an ISA machine, and The HD plugged into
the motherboard via ribbon cable. I'm not even sure if it was an ESDI
drive. I think it was just an MFM that had everything (including power) on
one cable.
That's right... My memory is fading! Quick, install some more 256k SIMMs!!!
The 30-286 had an ST-125L. A most interesting drive. The 55sx was the one
I'm thinking of, and I think you can swap them to the 50z, too. In the 50z,
the drive slips in behind the floppy drive(s) and plugs directly into an
MCA card. The drives are ESDI. That was something that really suprised me,
not being able to find a power cable. Drove me NUTS. And it shows. When it
comes to PC's, the PS/2 line has to be my favorite. When I'm not cursing
IBM, that is...
--------------------------------------------------------------
| http://members.tripod.com/~jrollins/index.html - Computers |
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--------------------------------------------------------------
12:48 a.m.
Technically IBM calls their proprietary drives "microchannel drives" and they
don't advertise the exact interface type it really uses. The 30-120mb IBM hard
drives (other than SCSI) can be swapped between machine models pretty easily,
generally without even running the reference/setup disk. They mount differently
but have the same interface. I doubt the IBM drives were MFM as the controller
auto senses the cyl/hds/etc without a hitch.
Wanna buy some PS/2's??? I have a bunch, models 30 (8088) through 95XP (8595 not
9595)
John Rollins wrote:
The PS/2 Model
30=286 didn't have a cable going to the riser card in it,
nor was it an MCA machine. It was an ISA machine, and The HD plugged into
the motherboard via ribbon cable. I'm not even sure if it was an ESDI
drive. I think it was just an MFM that had everything (including power) on
one cable.
That's right... My memory is fading! Quick, install some more 256k SIMMs!!!
The 30-286 had an ST-125L. A most interesting drive. The 55sx was the one
I'm thinking of, and I think you can swap them to the 50z, too. In the 50z,
the drive slips in behind the floppy drive(s) and plugs directly into an
MCA card. The drives are ESDI. That was something that really suprised me,
not being able to find a power cable. Drove me NUTS. And it shows. When it
comes to PC's, the PS/2 line has to be my favorite. When I'm not cursing
IBM, that is...
--------------------------------------------------------------
| http://members.tripod.com/~jrollins/index.html - Computers |
| http://www.geocities.com/Area51/Lair/1681/ - Star Trek |
| orham(a)qth.net list admin KD7BCY |
| ham-mac(a)qth.net Portland, OR |
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