12 Sep
2023
12 Sep
'23
7:11 a.m.
The recent Ebay auction for the original PDP-8 got my attention because one
of the photos (the processor logic flipchip array) is a nice snapshot for
comparison purposes with the system I am working on.
https://vintagecomputer.net/digital/pdp-8/PDP-8_flip-chips_left.png (mine)
https://vintagecomputer.net/temp/EBAYPDP-8ProcessorFlipchips.jpg
Given my PDP-8 is close to working, I would assume that the Ebay PDP-8
would have a fighting chance, at least as far as the flip chip
configuration goes. This is also a nice confirmation that I more or less
have the flipchips in the right places. There are only a few slight
differences.
Bill
12 Sep
12 Sep
8:29 a.m.
I have seen lots of small differences between machines with no real explanation of why.
On Sep 12, 2023, at 10:11 AM, Bill Degnan via cctalk
<cctalk(a)classiccmp.org> wrote:
The recent Ebay auction for the original PDP-8 got my attention because one
of the photos (the processor logic flipchip array) is a nice snapshot for
comparison purposes with the system I am working on.
https://vintagecomputer.net/digital/pdp-8/PDP-8_flip-chips_left.png (mine)
https://vintagecomputer.net/temp/EBAYPDP-8ProcessorFlipchips.jpg
Given my PDP-8 is close to working, I would assume that the Ebay PDP-8
would have a fighting chance, at least as far as the flip chip
configuration goes. This is also a nice confirmation that I more or less
have the flipchips in the right places. There are only a few slight
differences.
Bill
8:31 a.m.
The biggest worry I have regarding the ebay auction are the three missing
core memory case screws. Implies a non-DEC repair/inspection attempted.
Bill
On Tue, Sep 12, 2023, 11:29 AM Michael Thompson via cctalk <
cctalk(a)classiccmp.org> wrote:
I have seen lots of small differences between machines
with no real
explanation of why.
On Sep 12, 2023, at 10:11 AM, Bill Degnan via
cctalk <
cctalk(a)classiccmp.org> wrote:
The recent Ebay auction for the original PDP-8 got my attention because
one
of the photos (the processor logic flipchip
array) is a nice snapshot for
comparison purposes with the system I am working on.
https://vintagecomputer.net/digital/pdp-8/PDP-8_flip-chips_left.png
(mine)
https://vintagecomputer.net/temp/EBAYPDP-8ProcessorFlipchips.jpg
Given my PDP-8 is close to working, I would assume that the Ebay PDP-8
would have a fighting chance, at least as far as the flip chip
configuration goes. This is also a nice confirmation that I more or less
have the flipchips in the right places. There are only a few slight
differences.
Bill
10:25 a.m.
On Tue, Sep 12, 2023 at 8:31 AM Bill Degnan via cctalk <
cctalk(a)classiccmp.org> wrote:
The biggest worry I have regarding the ebay auction
are the three missing
core memory case screws. Implies a non-DEC repair/inspection attempted.
Bill
Did you ask the seller about it?
Sellam
11:51 a.m.
I should have said, my worry - if I was to buy or bid - is that the screws
are removed from the core memory cover. I am not remotely planning to bid,
too pricey IMHO
Bill
On Tue, Sep 12, 2023, 1:25 PM Sellam Abraham via cctalk <
cctalk(a)classiccmp.org> wrote:
On Tue, Sep 12, 2023 at 8:31 AM Bill Degnan via cctalk
<
cctalk(a)classiccmp.org> wrote:
The biggest worry I have regarding the ebay
auction are the three missing
core memory case screws. Implies a non-DEC repair/inspection attempted.
Bill
Did you ask the seller about it?
Sellam
251
days inactive
251
days old
4 comments
3 participants
participants (3)
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Bill Degnan -
Michael Thompson -
Sellam Abraham