Mike Spurgeon wrote:
Michael J. Mahon wrote:
The original Thunderclock (and many clones) didn't store the year at all, just the month, day, and day of week. The ProDOS clock driver used the calendar congruence and a table of years to compute the year within a 5 or 6 year interval (depending on whether the interval included two or one leap years). In that case, the year was all software.http://www.apple2.org.za/gswv/USA2WUG/SystemSoftware/slotclock
Try this URL with "slotclock.patch.txt". The ".patch.txt" apparently got truncated. -michael NadaNet networking for Apple II computers! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."