
16 Jun
2016
16 Jun
'16
4:58 p.m.
On 06/16/2016 12:53 PM, Peter Hiscocks via talk wrote:
The Commodore PET and 64 had a 60Hz real-time-interrupt that did a bunch of housekeeping. You could patch your own routines into it, which was really handy.
After a particularly nasty bug, that's where I learned about the importance of semaphores in controlling access to shared resources ;)
You may recall the Commodore CBMs used in the digital logics lab at Ryerson. I vaguely recall using that RTC in some labs.