Too many beers? IBM PS/2 Model 70 MCA

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Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Sun May 14, 2017 9:43 am

Well there you go, a few beers, wake up the next morning, and get a message from ebay saying your offer has been accepted!!!

WHAT!!

Why did I make an offer on an MCA PS/2, I haven't seen my XENIX MCA install set for years? Which must have been the only reason I made the offer.

I'm not running windows 3.x on it, no way, ahhhh but I do have a lot of OS/2 stuff in the loft.

No idea of the spec, but that's what happens when you go playing ebay poker blind at night I suppose.

oh man, I thought my days of floppy disk changing where over, let alone a floppy based bios.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby GL1zdA » Sun May 14, 2017 1:31 pm

I burned a lot of money before I've got a working DBA drive for the PS/70. It's probably the oldest computer in my collection, currently running OS/2 2.0.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby Y888099 » Mon May 15, 2017 2:26 am

uunix wrote:Too many beers?


Drunk? :)
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby spiroyster » Tue May 16, 2017 2:07 am

Does it have an FPU? An MCA IrisVision which would make the perfect companion for that machine. :)

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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Tue May 16, 2017 2:14 am

Y888099 wrote:
uunix wrote:Too many beers?


Drunk? :)

Not terribly, I just woke up wondering why I'd bid, what crazy plan was on my mind at the time.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Tue May 16, 2017 2:15 am

spiroyster wrote:Does it have an FPU? An MCA IrisVision which would make the perfect companion for that machine. :)

No idea, I don't even know if it's a 386 or 486. I read most are 386, but some later ones had a 486DX 66 which would be rather cool, if I read correctly.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby spiroyster » Tue May 16, 2017 2:47 am

386 required FPU co-processor (387 is one such example), 486 was a renascence in the realisation that this should have a been a God-given right.

Indeed they are cool... you can run them without heatsinks! [EDIT:] :roll: Actually I think you need a heatsink, but you definately don't need a fan.

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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby commodorejohn » Tue May 16, 2017 7:15 am

Floating-point is for the weak. Fixed-point integer math, now that's where it's at.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Tue May 16, 2017 7:51 am

Let us not forget the 486 SX.. I had one in my Valuepoint many years back. In fact I recall, I purchased a '486 66 DX BluePoint??? Chip made by IBM.
I fitted it, it blew up, I took it back and said it was faulty.. the guy looked at me knowing damn well I'd not changed the voltage settings on the MB or something like that. Anyway, think I replaced it for a Sounblaster card or similar. I loved my Valuepoint, with OS/2 Warp 3 installed.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby vishnu » Tue May 16, 2017 2:47 pm

I've still got my 286 based PS/2 System 50z, I think it still works, haven't powered it up in a few years...
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Wed May 17, 2017 12:57 am

vishnu wrote:I've still got my 286 based PS/2 System 50z, I think it still works, haven't powered it up in a few years...

What's running on it Vishnu?
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby vishnu » Wed May 17, 2017 11:09 am

uunix wrote:
vishnu wrote:I've still got my 286 based PS/2 System 50z, I think it still works, haven't powered it up in a few years...

What's running on it Vishnu?

If I recall correctly from back when the last glaciation was melting, it's Windows for Workgroups on top of DOS 8.0... :shock:
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Wed May 17, 2017 11:59 am

I am actually quite excited about it's arrival, (as always) and I guess it should arrive tomorrow fingers crossed.
I've owned a few MCA machines in the past from IBM's Tower to a very nice Apricot model [Q-something] which ran XENIX with it's rather cool predictive command line. That as I said earlier, I am sure is long gone unless I get back in the loft and shift a tonne of stuff around.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby Black Cardinal » Wed May 17, 2017 12:24 pm

vishnu wrote:
uunix wrote:
vishnu wrote:I've still got my 286 based PS/2 System 50z, I think it still works, haven't powered it up in a few years...

What's running on it Vishnu?

If I recall correctly from back when the last glaciation was melting, it's Windows for Workgroups on top of DOS 8.0... :shock:

Actually it would more likely have been DOS 5.0 on a 286. DOS 8 was never a standalone DOS release, it was part of Windows Me much later. But if you really were running Windows for Workgroups that wasn't until 1993 or so, maybe it was DOS 6.0, 6.2, or 6.22.

In 1989 the lab where I was a high school intern got their first PS/2 machines (Model 80s) loaded with DOS 5.0. Windows was still segregated into Windows/286 and Windows/386 at the time. We usually just fired up the "runtime" version of Windows to use Excel but dropped back to DOS for WordPerfect and everything else. The difference between runtime Windows and regular Windows was that you could only run one application at a time on the runtime version.

One scientist's Model 80 arrived with a 320MB hard drive installed instead of the 80MB one that he had intended to order. It wasn't a free upgrade so he seriously considered getting the drive swapped back. 320MB seemed ridiculously large to us at the time, we couldn't imagine having enough data to fill it, and we were modeling chemical migration in soils in C and FORTRAN on it. He decided to keep the larger drive, though.
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Re: Too many beers? IBM PS/2 Model 70 MCA

Unread postby uunix » Tue May 23, 2017 8:04 am

It arrived today, cute little business like machine..
Usual 161, 162 errors.
Download and created Reference disks and away I went.... well nearly.

First disk got to the setup phase and then half way through restoring it's configuration suffered a read error on the disk. Only choice was cancel.

Every single attempt after that, has failed with config sys error and command com not found.

I'm suspecting a poorly disk drive. 5 floppies can't be wrong. Well they could, most are brand new, I'm now trying on some older floppies.

It has a 386, 10baseT network & an 80 MB disk drive.

I will persevere though.
[Edit] When I post something, I always seem to get to the next step..
Anyway, after a combination of disks, I managed to get in, set the date and reboot, now I have a 10483 Error meaning a problem with the ESDI Controller / Drive.
I'm going to take it apart and check everything is clean and tight first.
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