12 Oct
2006
12 Oct
'06
4:36 p.m.
As a curious aside, the trimmer near the 14 MHz
crystal on the 5150 is
intended not to adjust the time-of-day clock accuracy, but rather to adjust
color rendition with the CGA card.
But only if you're using a composite NTSC monitor (the colour subcarrier
-- 3.58-ish MHz -- is 1/4 of the master clock freqwuncy, of course). On
a TTL RGB monitor, like the 5153, the trimemr does nothing.
-tony