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System Restoration
Bytemaster
System Cards
dg Printer
Keyboard Restore
Phi Deck & Disk
dg Software
Mark-8 Minicomputer
TV Typewriter
the digital group
ASR-33
ADM-3
MOS Kim-1
Apple 1
Document Archive
My Collection
Wish List
VCF 6.0
VCF 7.0
Links
About Me |
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The Circuit Boards
I'm still working on this page, patience!
8K RAM board |
32K Static RAM |
32K Dynamic Memory |
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Z80 Processor Board
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[insert
photo here!]
8080
Processor Board
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6800 Processor Board
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[insert
photo here!]
6502
Processor Board |
Four Port I/O Board |
[insert
photo here!]
Oddball
I/O w/Serial |
Serial I/O Card |
Video/Cassette, 32x16 Character |
Video/Cassette, 64x16 Character |
Phi-Deck Controller |
Floppy Controller |
[insert
photo here!]
High
Density Disk Controller |
HAM Board |
[insert
photo here!]
Votrax Voice |
[insert
photo here!]
I/O Prototyping
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The serial I/O card is labeled "AEON".
Although the original design was by The Digital Group,
this card was made after Digital Group was sold off in
bankruptcy. AEON purchased many of the assets of the
failed company and went into business selling what was
still in demand. Other companies did the same with the
rights to other Digital Group products.
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256 Character Video Card
This is Digital Groups original video card, the first product
offered by the company. The copyright is
1975, and the memory chips are 1101 types (256x1 bits). The
layout is 8 lines by 32 characters. Kind of odd, but hey! It was
VIDEO! This card was designed for the Mark
8 Minicomputer, and was described in the "8008 packet
#1", sold by the digital group starting in the fall of
1974. The packet consisted of software and hardware
modifications and improvements to the Mark 8. When I got it,
there were about a dozen missing chips, I spent a bit of time
reverse engineering it enough to identify and replace the
missing parts before I received a copy of the 8008 packet.
The board has been assembled with a keyboard to form a TV
Typewriter, and now has a page on my web site.
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First Digital Group Board, 8X32
Video
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