20 Aug
2015
20 Aug
'15
12:41 a.m.
Alternatively, does anyone know if there is any degree of signalling compatibility
between the VT100 and VT220/320 keyboards?
I am sure there is no compatibility. The VT220, etc keyboard (LK201) interface is a 9600
baud
asynchronous serial port. The VT100 keyboard has a single bidirectional data line, which
something
tells me carries clock and data.
It would of course be possible to make an interface between them, or to make a VT100
compatible
keyboard from scratch (schematics are in the VT100 printset and the keyboard is all
standard ICs,
including one of those dumb 40 pin UARTs). But it's not just a cable adapter.
-tony