by AltairClone » February 26th, 2016, 7:48 pm
The Altair Clone includes the 88-VI/RTC board from which you can get 60hz interrupts, or another neat trick is to use a serial port and just continually transmit characters into the air as a timebase. For example, on a 9600 baud serial port configured for 8N1, you'll get an OK to transmit bit 960 times per second. This gives you just over a millisecond to go update lights, do some housekeeping, etc., before you come back to wait on the UART to sync again.
Mike