write signal on another, but even I don’t know why anyone would want to do this! Two
LEDs have been added for the benefit of those who, like me, feel that computers
should have flashing lights on them – these are handy for checking that the circuit is
actually operating, when your program to use it seems not to be working....
The full definition of the
Gemini 80 bus
can be found in INMC-80, No. 4, pages 24-30
The original Nasbus is defined in Nascom Document PF/007 Issue No. 1.
DIAGRAM 2: BOARD MODIFICATIONS