Date   : Fri, 01 Feb 1985 01:52:36 GMT
From   : Tim Maroney <tim@CMU-CS-K.ARPA>
Subject: SuperBrain External Bus Info Wanted

Last year, I bought a military surplus Intertec SuperBrain for use as an
intelligent terminal.  However, it is far more versatile than that, which
has led me to want to attach some outher devices to it.  There used to exist
a beast known as a SuperBrain S-100 bus adaptor.  This fits onto the
internal 40-pin Z-80 bus connector, and provides an S-100 bus interface.

My question: Does anyone know where I could pick up the S-100 bus adaptor?
Alternately, how hard would it be to interface devices directly to the
40-pin connector?

Please keep in mind that I am a hardware cretin who writes device drivers
for a living (strange but true).  This would be essentially a "first
project" as far as the hardware is concerned, but supporting software is not
a problem.

The pin connections to the internal Z/80 bus are shown below:

PIN    SIGNAL  DESCRIPTION
       NAME
1              SPARE
2      SYSRES* System Reset Output, Low during Power Up Initialize or
                       Reset Depressed
3              SPARE
4      A10     Address Output
5      A12     Address Output
6      A13     Address Output
7      A15     Address Output
8      GND     Signal Ground
9      A11     Address Output
10     A14     Address Output
11     A8      Address Output
12     OUT*    Peripheral Write Strobe Output
13     WR*     Memory Write Strobe Output
14             SPARE
15     RD*     Memory Read Strobe Output
16             SPARE
17     A9      Address Output
18     D4      Bidirectional Data Bus
19     IN*     Peripheral Read Strobe Output
20     D7      Bidirectional Data Bus
21             SPARE
22     D1      Bidirectional Data Bus
23             SPARE
24     D6      Bidirectional Data Bus
25     A0      Address Output
26     D3      Bidirectional Data Bus
27     A1      Address Output
28     D5      Bidirectional Data Bus
29     GND     Signal Ground
30     D0      Bidirectional Data Bus
31     A4      Address Output
32     D2      Bidirectional Data Bus
33             SPARE
34     A3      Address Output
35     A5      Address Output
36     A7      Address Output
37     GND     Signal Ground
38     A6      Address Output
39     +5V     5 Volt Output
40     A2      Address Output
-=-
Tim Maroney, Carnegie-Mellon University Computation Center
ARPA:  Tim.Maroney@CMU-CS-K    uucp:   seismo!cmu-cs-k!tim
CompuServe:    74176,1360      audio:  shout "Hey, Tim!"

"Remember all ye that existence is pure joy; that all the sorrows are
but as shadows; they pass & are done; but there is that which remains."
Liber AL, II:9.