Replica 80x25 VDU Interface Board 

Replica 80x25 VDU Interface Board Photo

Based on the issue 4 schematic and photos of an Issue 4 board.

Presets RV1 and RV2 are adjusted to get a 12MHz and 2MHz clock respectively (if the local oscillators are used).

Links LK7, 8, 9, 10 and 11 are normally fitted in position A to select addresses as used by Acorn System COS and DOS.

Links LK4, 5, 6, 12 and 13 depend on which CPU Board is being used:

No other links need to be fitted for normal use.


Bill Of Materials

Front Panel Drilling

Blank PCB

Replica 80x25 VDU Interface Board PCB


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