What’s Missing?
Four-Phase Systems: 1969-1981 (click to enlarge
What’s Missing from this Four-Phase Systems family portrait? Hopefully the lost member arrives this week. Anyone remember Four-Phase?
August 13th, 2014 ~ by admin
CPU History Museum for Intel CPUs, AMD Processor, Cyrix Microprocessors, Microcontrollers and more.
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August 15th, 2014 at 7:56 pm
[…] What’s Missing? […]
December 20th, 2014 at 6:31 pm
I worked for Four Phase Systems in the early 80’s and I
still have business cards with my name on them. I found a
few IC chips the other day. Namely 91100091 RAM-9 but also
91130083 I/O-8. If i remember correctly i was told they used Gold
in their IC design. Is this correct?
December 20th, 2014 at 6:46 pm
Like many IC’s of the era there is a fair amount of gold, in the package (pins and cap) as well as the bonding wires to the die itself.
June 8th, 2015 at 2:22 am
Worked for Philips Data System in Europe as a member of a small team that introduced the Four Phase systems, as OEM labeled Philips X1150 in this continent. I was trained in Cupertino in early 1973. The Systems were operational at customers untill 2004 or so.
June 11th, 2015 at 1:32 pm
It really is quite amazing how long some of these 1970’s systems keep running. Rebuilding software to run on a different platform clearly is a daunting task.
December 28th, 2015 at 9:35 pm
Did you ever get an AL/4? I assume that’s what you wanted.
January 1st, 2016 at 10:41 pm
yah the next post has it:
http://www.cpushack.com/2014/08/15/four-phase-systems-al1-processor-8-bits-by-lee-boysel/