hi all

Introduce yourself. Tell people why you are interested in vintage computers and what (if anything) you've got.

hi all

Postby Vaiuikad on Mon Mar 30, 2020 6:57 am

Hi guys, I'm new here, my name is David.
I want to reanimate an a old vintage computer, the IBM PS/2 55SX.
The dead component is the Real Time Clock (in particular, the battery inside).
Is it possible to simulate with a BASIC Stamp micro-controller the behavior of a DS1287 so that I can boot my old IBM PS/2 55SX?
The DS1287 pin are damaged (I mean current can not flow between the broken DS1287 and its socket) so I can't modify it, to use another battery.
David
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Re: hi all

Postby tezza on Mon Mar 30, 2020 11:33 am

Hi David,

Welcome to the forums!
Tez (Terry Stewart) (Administrator)
Collection: https://www.classic-computers.org.nz/co ... /index.htm
Projects and Articles: https://www.classic-computers.org.nz/blog/index.htm
Twitter: @classiccomputNZ | YouTube: Terry Stewart
Trade Me: tezza5
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Re: hi all

Postby andyg on Wed Apr 01, 2020 2:07 pm

Sigh.

I was a "Computer Service Engineer" for an IBM dealer in Wellington when the PS/2 line came out.

Those puppies were NOT CHEAP.
Andy Gardner, ZL3AG
CHCH
Hewlett Packard Instrumentation/Test Equipment Collector
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Re: hi all

Postby Mark0x01 on Sat May 23, 2020 1:06 pm

I went through the IBM servers from PC to PS/2 and xSeries with a few System 36, i and p as well.
Still fixing them, at least for a short while longer.

You should be able to replace it according to this info:
The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287
Drop-In Replacement for IBM AT Computer Clock/Calendar

https://www.maximintegrated.com/en/prod ... 2887A.html

Around $22 plus local freight.
https://nz.rs-online.com/web/p/real-tim ... s/1898609/

I use RS for most of my parts and find the service excellent.

Mark.
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