![](images/dg_logo.jpg)
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The Circuit Boards
A minimum Digital Group system consisted of a Processor card, an I/O
card, and a TV Readout & Cassette card with a motherboard, and power
supplies. DG owners could choose from a variety of other cards to complete
their systems and perform many tasks. Pictured below are examples of many
of the cards that were available from The Digital Group and are part of my
collection. I also have several cards manufactured by other vendors both
before and after the demise of Digital Group; AEON, TCS, Godbout, &
etc. The TCS 32K Memory is the only after market item I am using in any
system at the time of this writing, so it is the only one pictured below.
This card is used in my Mini-Bytemaster along with the early 32K Static
RAM card shown below.
I also have several boards that appear to have been "factory"
assembled. The boards look to have been wave soldered--all via's are
soldered through--and the solder job is consistent throughout the board.
They also have inspection stamps on the front or back. Hmmm.
Many of the boards shown below have been dusted off, but have not been
restored in any way though several are in working condition; they were
just the ones that were most accessible for picture taking. I also
included multiple versions of the same boards, if I have them.
Documentation is available for most of these boards by following the link
on the left. I also have pages dedicated to each of the four processors
available by clicking the links at the top of the page.
All photos below are approximately 1.7 Megabytes
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![2008-05-27a 052.jpg (1431950 bytes)](images/thumbs/2008-05-27a_052_small.jpg)
8K RAM Board
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![2008-05-27 146.jpg (1578243 bytes)](images/thumbs/2008-05-27_146_small.jpg)
Early 32K Static RAM*
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![2008-05-27a 049.jpg (1655423 bytes)](images/thumbs/2008-05-27a_049_small.jpg)
32K Dynamic RAM (factory assembled)
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![2008-05-27a 055.jpg (1584682 bytes)](images/thumbs/2008-05-27a_055_small.jpg)
8K
RAM Board
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![2008-05-27 150.jpg (1801585 bytes)](images/thumbs/2008-05-27_150_small.jpg)
Early 32K Static RAM
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![2008-05-27a 050.jpg (1869918 bytes)](images/thumbs/2008-05-27a_050_small.jpg)
32K
Dynamic RAM (factory assembled)
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![2008-05-27a 058.jpg (1628833 bytes)](images/thumbs/2008-05-27a_058_small.jpg)
Late 32K Static RAM
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![2008-05-27 142.jpg (1527485 bytes)](images/thumbs/2008-05-27_142_small.jpg)
TCS Brand 32K Static RAM
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![2008-05-27 135.jpg (1480867 bytes)](images/thumbs/2008-05-27_135_small.jpg)
Z80 Processor Board*
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![2008-05-27a 060.jpg (1794841 bytes)](images/thumbs/2008-05-27a_060_small.jpg)
Late 32K Static RAM
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![2008-05-27 144.jpg (1764180 bytes)](images/thumbs/2008-05-27_144_small.jpg)
TCS Brand 32K Static RAM
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![2008-05-27 138.jpg (1560330 bytes)](images/thumbs/2008-05-27_138_small.jpg)
Z80 Processor Board
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![2008-05-27a 068.jpg (1614924 bytes)](images/thumbs/2008-05-27a_068_small.jpg)
8080 Processor Board
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![2008-05-27a 116.jpg (1743140 bytes)](images/thumbs/2008-05-27a_116_small.jpg)
6800 Processor Board*
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![2008-05-27a 127.jpg (1714048 bytes)](images/thumbs/2008-05-27a_127_small.jpg)
6500 Series Processor Board*
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![2008-05-27a 070.jpg (1734815 bytes)](images/thumbs/2008-05-27a_070_small.jpg)
8080 Processor Board
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![2008-05-27a 117.jpg (1895378 bytes)](images/thumbs/2008-05-27a_117_small.jpg)
6800 Processor Board
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![2008-05-27a 122.jpg (1801360 bytes)](images/thumbs/2008-05-27a_122_small.jpg)
6500
Series Processor Board
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![2008-05-27a 062.jpg (1531509 bytes)](images/thumbs/2008-05-27a_062_small.jpg)
Video/Cassette, 32x16 Character--Rev A
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![2008-05-27 131.jpg (1401687 bytes)](images/thumbs/2008-05-27_131_small.jpg)
Video/Cassette, 64x16 Character--Rev B*
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![2008-05-27a 098.jpg (1606277 bytes)](images/thumbs/2008-05-27a_098_small.jpg)
Bare Video/Cassette,
64x16 Character--Rev C
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![2008-05-27a 065.jpg (1438776 bytes)](images/thumbs/2008-05-27a_065_small.jpg)
Video/Cassette, 32x16 Character--Rev A
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![2008-05-27 133.jpg (1496965 bytes)](images/thumbs/2008-05-27_133_small.jpg)
Video/Cassette, 64x16 Character--Rev B*
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![2008-05-27a 101.jpg (1662417 bytes)](images/thumbs/2008-05-27a_101_small.jpg)
Bare Video/Cassette, 64x16
Character--Rev C
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![2008-05-27 125.jpg (1239731 bytes)](images/thumbs/2008-05-27_125_small.jpg)
Four Port I/O Board*
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![2008-05-27a 043.jpg (1370268 bytes)](images/thumbs/2008-05-27a_043_small.jpg)
Serial I/O Board
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![2008-05-27 121.jpg (1317876 bytes)](images/thumbs/2008-05-27_121_small.jpg)
Floppy Controller--Single Density*
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![2008-05-27 128.jpg (1302570 bytes)](images/thumbs/2008-05-27_128_small.jpg)
Four Port I/O Board
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![2008-05-27a 046.jpg (1396247 bytes)](images/thumbs/2008-05-27a_046_small.jpg)
Serial
I/O Board
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![2008-05-27 124.jpg (1262812 bytes)](images/thumbs/2008-05-27_124_small.jpg)
Floppy Controller--Single Density
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![2008-05-27a 078.jpg (1486134 bytes)](images/thumbs/2008-05-27a_078_small.jpg)
Floppy Controller--Double Density
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![2008-05-27a 082.jpg (1652121 bytes)](images/thumbs/2008-05-27a_082_small.jpg)
Phi-Deck Controller--Rev B
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![2008-05-27a 087.jpg (1625078 bytes)](images/thumbs/2008-05-27a_087_small.jpg)
Phi-Deck Controller--Rev C
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![2008-05-27a 080.jpg (1573370 bytes)](images/thumbs/2008-05-27a_080_small.jpg)
Floppy Controller--Double Density
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![2008-05-27a 086.jpg (1770698 bytes)](images/thumbs/2008-05-27a_086_small.jpg)
Phi-Deck Controller--Rev B
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![2008-05-27a 089.jpg (1654721 bytes)](images/thumbs/2008-05-27a_089_small.jpg)
Phi-Deck Controller--Rev C
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![2008-05-27 112.jpg (1309511 bytes)](images/thumbs/2008-05-27_112_small.jpg)
Votrax Voice board*
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![2008-05-27a 074.jpg (1466697 bytes)](images/thumbs/2008-05-27a_074_small.jpg)
HAM Board
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![2008-05-27a 093.jpg (1520431 bytes)](images/thumbs/2008-05-27a_093_small.jpg)
I/O Prototyping Board
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![2008-05-27 115.jpg (1174078 bytes)](images/thumbs/2008-05-27_115_small.jpg)
Votrax Voice board
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![2008-05-27a 076.jpg (1396322 bytes)](images/thumbs/2008-05-27a_076_small.jpg)
HAM
Board
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![2008-05-27a 092.jpg (1555500 bytes)](images/thumbs/2008-05-27a_092_small.jpg)
I/O
Prototyping Board
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![2008-05-27a 095.jpg (1661542 bytes)](images/thumbs/2008-05-27a_095_small.jpg)
Bare 8080 Processor Board
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![2008-05-27a 103.jpg (1790460 bytes)](images/thumbs/2008-05-27a_103_small.jpg)
Bare Z80 Processor Board
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![2008-05-27a 107.jpg (809477 bytes)](images/thumbs/2008-05-27a_107_small.jpg)
Bare Low Current Power Supply
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![2008-05-27a 097.jpg (1739587 bytes)](images/thumbs/2008-05-27a_097_small.jpg)
Bare 8080
Processor Board
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![2008-05-27a 105.jpg (1731785 bytes)](images/thumbs/2008-05-27a_105_small.jpg)
Bare
Z80 Processor Board
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![2008-05-27a 106.jpg (951525 bytes)](images/thumbs/2008-05-27a_106_small.jpg)
Bare Low Current Power Supply
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![2008-05-27a 110.jpg (1287879 bytes)](images/thumbs/2008-05-27a_110_small.jpg)
Mini-Motherboard
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![2008-05-27a 111.jpg (1831285 bytes)](images/thumbs/2008-05-27a_111_small.jpg)
Standard Motherboard
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* Denotes restored and working
condition as shown.
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