On 11/19/11 16:37, Richard Atkinson wrote: > Pasi, I'd love to know what the chip numbers and date codes are on > these VIC-Is that exhibit the effect. I've never encountered it on any > of my VIC-Is, but on my VIC-IIs it seems to correlate exactly with the > 6569R4, 6569R5 and 8565R2. Ok, pulled out my VIC20's from the closet. Has yellow (I'm fairly sure of the color, but would need a screen-synchronized test to verify) dots: VIC20 Serno. WGC 27668 (board W-18 94HB) ceramic 6561E 1982 Changing to plastic 6561E 1682 does not change the symptoms, unfortunately I don't have a socketed 6561-101 I could try. Does not have the issue: VC20 Serno. WGA 23245 (board KU-14IT 94HB) ceramic 6561E 1982 Also do not have the dots: VIC20(cr) WGC 140812, plastic 6561-101 3683 VIC20(cr) WGC 225814, plastic 6561-101 3883 Like I said, it is curious the dots are only seen on the border, although in VIC-I the border and background colors are in the same register. -Pasi Message was sent through the cbm-hackers mailing listReceived on 2011-11-19 21:00:08
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