1995- Timex Sinclair based home control system- looking at telephone exchange and
X10/I.O. boards. Voice synthesizers, power supply and computer underneath. TV transmitter
on left side.
There’s not much left of the Timex OS except TV generator and keyboard scanning.
The X10 interface uses a unique scanning system to keep the remote modules in the
state they’re supposed to be.
Multipoint RS232 interface- Normally you have one RS232 device per port. I had over
16 that only transmitted if they detected a command relevant to that device. The
laptop connected directly to all of them in parallel.