Jim's 8008 Page

(note: this is not a public page, as it
contains copyrighted materials.
Please do not abuse it)

 

My Mark-8 reconstruction, built 25 years after the original Radio-Electronics article:
The PCBs are new, the ICs and other components are as close to the correct age as possible.  The switch PCB is my design; the original switches were hand-wired.
(click on picture for a more detailed view)

Tools

My 8008 Interactive Assembler for Windows (570KB)  (sample program)
updated 7/29/2002 - V1.12 - added hex file output, new directives (BSS, DATA, CODE) and new opcode LHLI
updated 10/31/2002 - V1.15 - added file backup and fixed some display bugs

8008 Inverse Assembler for HP Logic Analyzers  Simple, but it works (screen shot).  As few as 12 connections to the CPU and you can see what instructions are being executed.  There are two versions; one demultiplexes the 8008 address bus  itself, and one uses the latched address present in most designs and has a bit more flexibility in clocking and tracing.  Source code included.

Hardware

The switch printed circuit board.   I mounted the switches on a printed circuit board for a cleaner appearance and a better mechanical mounting, since I didn't want to mount my Mark-8 inside a cabinet.
The Mark-8 prototyping board.  I laid out this board in order to have a clean way to add some memory and I/O to my Mark-8.  It is intended to replace the existing memory board, but could also co-exist with it.
Documentation for the 1974 (?) Godbout 4K Memory card using 2102's.  This is very interesting - a 3rd party memory board for the Mark-8 by Godbout, later a major S-100 vendor.  The only one of these boards still in existence that I am aware is in Bryan Blackburn's Mark-8.  The earliest Godbout ads that I have (Byte 1975) make no mention of this board, but it's likely that it is mentioned in the newsletters below somewhere.

(TIFF, 2 pages, 358 KB)

Documents

September 1974
  • Hal Singer starts the Micro-8 Newsletter for enthusiasts of the Mark-8.

Volume 1:  #1  #2  #3  #4  #5  #6  #7  #8  #9  #10  #11  #12
Volume 2:  #1  #2  #3  #4  #5  #6 (last published issue?)

(1-6MB each, 600 DPI, TIFF multi-page format)

November 1974
  • Hal Chamberlin and others begin publishing The Computer Hobbyist magazine.

Volume 1:  #1  #2  #3  #4  #5  #6  #7  #8  #9  #10 (last published issue)

(1-8MB each, 600 DPI, TIFF multi-page format)

Intel MCS-8 Manual including 8008 Data Sheet (pdf, 62 pgs, 5.9MB)

This is the classic reference book for 8008 designs.

The Mark-8 construction article.  Scan from S. Gabaly, contrast enhanced and made into a PDF by me

(note: this includes both the magazine article and the schematics and layouts from the separate construction booklet)