64, to be exact.
Written on January 21st , 2026 by Tech Ads
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The Digital Group adds characters).
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The Digital Group’s computer
systems have a lot of character
already. Just one quick look at
any of our products in their
unique custom cabinets con-
firms that. But we believe it
never hurts to add a bit more.
So, the Digital Group has added
character in a big way to give an
added dimension to the opera-
tion of our video-based com-
puter systems. We are pleased
to announce our new readout with a 64-character line.
It will give your system a ge deal more capability. Give
it more character, if you will.
Here are the specifics on the Digital Group TV Readout
and Audio Cassette Interface:
1024 Character TV Readout
¢ 64 characters horizontal by 16 lines
e 7x9 character matrix (effectively 7x12 due to char-
acter shifting)
e 1K on-board RAM for buffer storage—requires
no main memory—completely independent
e 128 character ASCII
Upper case alpha
mtg case alpha with base line extenders (g,
), P, » 4
Numbers and extended math symbols
Greek alphabet
e Software driven cursor—forward and backward
¢ Compatible with most microprocessors; Interfaces
with 1 8-bit parallel output port
e Timebase may be driven with an external timebase
(may be synchronized to TV camera, TV set, etc.)
e Readout timebase available at connector (can be
used for graphic driver, etc.)
e White characters on black, and/or black on white;
software selectable
¢ Plugs into standard dual 22-pin TVC connector on
Digital Group Systems
Improved Audio Cassette Interface:
¢ Reliable FSK recording technique
e Uses standard unmodified audio cassette recorder
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e Write cassette system
uses a digitally synthe-
sized frequency shift
system, derived from TV
system’s master crystal
oscillator
Read cassette system
easily aligned using the
write system as an align-
ment aid.
e Runs at 1100 baud
(100 characters/second)—loads
16K in 3 minutes
512 TVC to 1024 TVC Upgrade Kit:
As always, when the Digital Group extends the capabilities
of our systems, it doesn’t mean obsolescence for any
roducts. We are offering an upgrade kit for present Digital
roup system owners who wish to go to the longer Tee
length. This kit uses most of the IC’s from our TVC-F read-
out. No unsoldering is required; all new sockets, capac-
itors, resistors, PC board and other necessary parts are
supplied.
Prices:
TVC-64—Full 64-character TV Readout & Audio Cassette
Interface:
Kit — $140 Assembled — $205
TVC-64UPG— Upgrade kit from TVC-F:
Kit — $65
If you already own a Digital Group system, our 64-charac-
ter line will definitely enhance its operation. If you’re just
looking, you might want to keep in mind that the Digital
Group has a lot of characters.
Write or call now for details on our new 64-character TV
readout and all our other exciting products.
Wie Chigiall GirROULD
box 6528 denver, colorado 80206 (303) 777-7133
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‘64, to be exact.’
The Digital Group’s TVC-64 was a combined graphics card and tape interface.
As a graphics card, the TVC-64 was capable of outputting 1024 characters in the form of 16 lines of 64 characters each. Each character was formed from 7 by 13 matrix of dots. The TVC-64 was specifically designed to display its output on a TV screen- allowing the user to choose a cheaper TV display over a more expensive dedicated monitor. As a tape interface, the TVC-64 was capable of running at 1100 baud (110 characters/second) and worked with a standard tape recorder.
A copy of the manual and other product information can be viewed at BitSavers.
Taken from: Kilobaud Microcomputing - Issue 7 (July 1977)
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