9 Dec
2011
9 Dec
'11
2:21 p.m.
The circuit from the Vectrex videogame console might be an interesting
option. It was based on the 6809 and so should be trivial to adapt for a
6800 machine. It uses analog circuits to draw lines: you set up the
initial x and y values, select the final x and y and let the circuit
interpolate between the two while the processor has time to do other
things.
The schematics are on pages 33 to 48 (and is explained in earlier pages)
of:
http://www.vectrex.nl/docs/vecman.pdf
The needed components are very cheap.
-- Jecel