31 Oct
2011
31 Oct
'11
2:38 a.m.
2011/10/25 Dan Roganti <ragooman at gmail.com>
Correct again.. I just 'wished' that I was correct on this one...
Please let us know if you find some more info.
From what I read about on the various rockwell PPS-4 websites, the /1
chipset is either a 76xx or 77xx part#. At the moment, I don't recognize
your part#.
That is understandable... Further investigation from others on this list
has shown that my part really isn't a PPS-4/1 but a custom chip based on
common ancestor calculator chip.. Bummer.
I do believe (again from internet sources) that the
PPS-4/2 means that a
minimal system could be made of two chips, a PPS-4/2 and a combined
RAM/ROM.
That could be, you need the 10696EE Support chip to interface some RAM. But
this chipset still needs one of the I/O support chips, a 10696EE, A1752EF,
or 10788EB to talk with the real world :)
One mail on this list has given me more information that 20 hours searching
the net.
I thank you all.
Maybe this is a 4bit embedded version as in a TMS1000
found in the Big
Trak.
Unfortunately no, see above... Totally custom...
I am also guessing that since the chip ends with EA it could have a
"electrically alterable" rom instead of a maskable rom.
None of the PPS-4 parts I've seen or have here are any 'EA' versions, only
masked Rom.
=Dan
I got full spec of the PPS-4 and some of the ram/rom chips in the same
family.
I was rather impressed with the complexity of the chip. I have done my
share of z80, 6501, arm, x86 but looking back on a
1972 4 bit chip and see that much has changed but then again not so much
was very enlighten.
I still get amazed about the history of electronics and space stuff.
Just think about what they did in the '60 with the space program.... thats
50 years ago..
Think about Einstein. I took me many years to just accept (& understanding
part of) normal and special relativity.
And special relativity is more than 100 years old... Amazing!
Med venlig hilsen / Best regards
Benjamin S?lberg