ps2 memory - with weird square silver IBM Circuit packaged memory on the sti

Paul Berger phb.hfx at
Sat Jan 28 19:56:02 CST 2017

There was also a period of time when an earthquake in the far east 
knocked out some of the fabs there, and the supply of memory got so bad 
that some manufacturers had to stop shipping systems, but IBM just 
switched to using their own memory.  It also went the other way too, the 
send generation CPU for the RT (6150/51) the Advanced processor or 
ROMP-C was designed to use IBM memory modules in aluminum cans, but all 
of the supply was going to higher margin products like mainframes, so in 
the end a lot of the CPUs where shipped without the 4MB of memory being 
populated.  I was supporting a project that as using 6150 workstations 
at the time and upgraded several machines from the original NMOS 
processor to the CMOS enhanced processor.


On 2017-01-28 9:00 PM, Guy Sotomayor Jr wrote:
> At one time IBM was the largest manufacturer of memory and consumed *all* of
> it internally (e.g. for IBM products).  At the time all of IBM’s ICs were in
> the “aluminum” cans unless they needed more exotic cooling.
> In the PS/2 days, we ended up using some IBM produced memory because we could
> get a better internal transfer price than buying out in the market because the
> various IBM fabs had a bit of excess capacity and wanted it used.
> TTFN - Guy
>> On Jan 28, 2017, at 11:44 AM, COURYHOUSE at wrote:
>> The  talk of  PS2 memory brought something back  to me I  have in a drawer
>> here...
>> ps2 memory -  with weird square silver IBM  Circuit  packaged memory on
>> the stick.
>> What is the  story on this? was IBM making it's own memory chips or  just
>> repackaging them into
>> their  silver square packaging?
>> Now  I will have to   dig these things  out.
>> Thank  Ed#   _www.smecc.org_ (

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