View Single Post
Old 31 December 2012, 17:37   #21
mark_k
Registered User
 
Join Date: Aug 2004
Location:
Posts: 2,481
Also it says the HSYNC reset pulse is 32usec long (which is about half a scanline period), though it looks shorter than that in the timing diagram. It looks to end about 1/3 of the way through the scanline in the diagram. CIA-B TOD counts on the rising edge of that so it will count at 1/3 to 1/2 the way along every other scanline.
mark_k is offline  
AdSense AdSense  
 
Page generated in 0.04561 seconds with 9 queries