DEC House numbers (chips) on M8655
Robert Krten
but some of the chips have DEC house numbers. I've included a listing
of the chips on my particular M8655, with the hope that someone has
one that has non-house numbered chips in the places where I have them,
and vice versa... If there isn't already a page for DEC house number
to industry-standard chip numbers (where possible), I'll be happy to
provide one.
Also, I'm wondering if anyone's done a bootloader using the M8655 -- I
don't have a paper tape reader or teletype, and was therefore thinking
of using the M8655 to bootload programs...
Thanks in advance!
Cheers,
-RK
E1 DEC8242
E2 DEC8242
E3 7400
E4 5.0688MHz Crystal Oscillator Pack
E5 DEC8242
E6 (socket, empty)
E7 DEC7486
E8 7493
E9 7492
E10 DEC5384
E11 DEC97401
E12 DEC5384A
E13 DEC8815
E14 7493
E15 7493
E16 7404
E17 7493
E18 7493
E19 SMC COM 2017 (UART Chip)
E20 7474
E21 7400
E22 74151
E23 DEC97401
E24 DS8640
E25 74174
E26 7430
E27 7474
E28 (socket, empty)
E29 DEC97401
E30 DS8640
E31 74175
E32 7404
E33 DEC97401
E34 DEC97401
E35 7402
E36 DEC8266
E37 7402
E38 7400
E39 7474
E40 7400
E41 7442
E42 7474
E43 7474
E44 7493
E45 1489
E46 DEC5384A
E47 7410
E48 7440
E49 7404
E50 1488
E51 DS8640
E52 DS8640
E53 DEC8815
E54 7400
E55 DS8640
E56 7474
E57 7474
--
Robert Krten, PARSE Software Devices; email my initials at parse dot com
Consulting, Systems Architecture / Design, Drivers, Training, QNX 4 & Neutrino
Check out our new QNX 4 and Neutrino (QRTP) books at http://www.parse.com/
Wanted PDP-8/9/10/11/12 Systems/documentation/spare parts! Will trade books!
David Gesswein
Robert Krten <nos...@parse.com> wrote:
>I have an M8655 and I'm trying to complete the documentation for it,
>
http://www.pdp8.net/query_docs/query.shtml including this board.
>but some of the chips have DEC house numbers. I've included a listing
>of the chips on my particular M8655, with the hope that someone has
>one that has non-house numbered chips in the places where I have them,
>and vice versa... If there isn't already a page for DEC house number
>to industry-standard chip numbers (where possible), I'll be happy to
>provide one.
>
This is somewhat from memory so verify first.
DEC 82xx is Signetics 82xx series.
DEC 5xxx is Signetics SPxxx, and another I can't remember now.
DEC 88xx is National DS88xx series or also I think Signetics 8Txx series.
My DEC 97401 is also labeled a SN7401. These may of been selected for
some characteristic for driving the Omnibus.
>Also, I'm wondering if anyone's done a bootloader using the M8655 -- I
>don't have a paper tape reader or teletype, and was therefore thinking
>of using the M8655 to bootload programs...
>
Standard RIM/BIN loaders will work fine. You need a program on your PC
which can send raw binary out the serial port (including 0). Hyperterm
on the PC will work (the original 95 version doesn't, get a later from
www.hilgraeve.com) and Seyon under Linux will also work.
David Gesswein
http://www.pdp8.net/ -- Old computers with blinkenlights
antonio.carlini
>
> I have an M8655 and I'm trying to complete the documentation for it,
> but some of the chips have DEC house numbers. I've included a listing
> of the chips on my particular M8655, with the hope that someone has
> one that has non-house numbered chips in the places where I have them,
> and vice versa... If there isn't already a page for DEC house number
> to industry-standard chip numbers (where possible), I'll be happy to
> provide one.
I've never seen such a page.
The following comes from the DEC Technician's Handbook 1974.
(part no. DEC-00-HTHAA-A-D).
Some of the parts referenced seem to be TTL, most of the
ones I found in the HB appear to be similar to TTL and may
be simply an internal DEC number for a standard part, or the
parts may be to a different spec. than was normally
available. The HB includes pinouts, I have not checked against
my TTL 74 series HB but I've included pin counts so at
least gross innaccuracies should show up.
> E2 DEC8242
Quad 2-input EX-NOR with oc outputs (14 pins)
> E7 DEC7486
Quad 2-input EX-OR (14 pins)
> E10 DEC5384
A version of the 384 selected for speed and noise
immunity. The 384 is a quad 2-input OR gate (14 pins).
> E11 DEC97401
Quad 2-input NAND gate. Low output leakage current.
Open collector.
> E13 DEC8815
Dual 4-input NOR (14 pins)
> E36 DEC8266
Quad 2-line to 1-line selector
HTH,
Antonio
--
---------------
Antonio Carlini arca...@iee.org
Arthur Krewat
>
> My DEC 97401 is also labeled a SN7401. These may of been selected for
> some characteristic for driving the Omnibus.
>
I've seen other TTL 74-series chips labeled this way too. I do not think
it's specific to DEC, although "syncronicity" (like the Police album) is
possible.
I worked on an Asteroids arcade game for a friend a long time ago, and
found chips numbered like that - oh wait, weren't there arcade games
that were PDP-8's?
art k.