Addons published, most of those to be inserted in the expansion connector, so one at a time.
The crystal oscillator gice the TEC-1 a real crystal fixed clock.
8×8 matrix
Crystal oscillator
EPROM burner
Input Output module
NVRAM
Printer plotter
RAM stack
Relay board
Speech module
TEC Power supply
The DAT board
See also:
John Bell PN 80-Z80
Z80 Microcomputer PN 80-Z80
PCB images by Gledn Deas, thanks!
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