7 Dec
2025
7 Dec
'25
1:22 p.m.
On 2025-12-07 9:59 a.m., John Robertson via cctalk wrote:
Hi Folks,
I've done the online searches, and know that bitsavers.org (Hi Al !)
has a reasonable amount of information, however I am looking for ap
notes and more information than is currently archived.
At the moment one chip I am researching is the MM76E (not the 40-pin
EL version) ROM as I can't find the pinout anywhere - so far. I can
figure it out, but it is always better to have the manual if possible...
Any documents found will be off to bitsavers of course, but I'm hoping
that someone here has an ancient (70s!) Rockwell manual on these
42-pin spider chips!
Did anyone ever make an emulator for the MM78 CPU family?
Thanks,
John :-#)#
Also posted to s.e.design as one never knows with usenet what turns up...
And answering my own question, just a bit, there is a compiled
collection of a number of the files on a file on bitsavers that has the
following list:
Here is a list of PPS-4 documents as of June, 1974 from 29003N11: PPS-4
Basic Devices, Data Sheet, Page 27
------(quote with my comments in brackets)-----------------
PPS-4 DOCUMENTATION
The PPS is supported by a complete and comprehensive
set of documents. These documents are continually updated to
incorporate additional data and/or reflect new capabilities or
techniques.
The supporting documents are listed below:
TITLE DOCUMENT NO.
29003N11 PPS-4 Basic Devices, Data Sheet (this document)
29000N32 Installation of 42-Lead Plastic Package
29000N31 MOS/ROM Card Format, Procedure
10738N11 Bus Interface, Data Sheet
10788N11 GPKD, Data Sheet
10789N11 Printer Controller, Data Sheet
10439PN10 MNOS Non-Volatile RAM, Data Sheet
10443N10 EAROM, Data Sheet
10696N22 GPl/O, Application Notes
29004N41 Evaluation Modules, Product Description
29001N20 Programmer's Reference Manual
29001N21 Programmer's Ref. Manual, Supp. No. 1
20992N20 Tymshare Timeshare Operating Manual
29004N20 GE Timeshare Operating Manual
29003N22 ROM Emulation for Microprogram Development, Application Notes
20371 N10 1200 BPS TOI, Data Sheet
2518-0-23 PPS-4 Applied to Electronic Weighing Scale, Application Notes
----------------(end quote)------------------
What I have collected are the following PP4 (and some PP4-2) manuals:
2519-D-13 Evaluation & Development Modules
2900D01 MM78
2900D28 Rv2 A17xx
10371N10 Rv April 1974 1200 BPS Telecommunications
10696N22 Rv0 General Purpose IO
10738N11 Rv2 Bus Interface
10788N11 Rv2 Gen Purpose Keyboard & Display
10789N11 Rv1 Parallel Processing
10815N10 Rv0 Keyboard Print Controller
29003N11 Rv3 Basic Devices
29410N41 Rv5 MM76 1-chip microcomputers.
and a few others I can't find the numbers for on the files. A number of
these are compiled in a single file.
John :-#)#
--
John's Jukes Ltd.
7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
Call (604)872-5757 (Pinballs, Jukes, Video Games)
flippers.com
"Old pinballers never die, they just flip out"