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Forums > C64 Coding > VSP Hardware fix revealed
2015-04-26 16:18
chatGPZ

Registered: Dec 2001
Posts: 11145
VSP Hardware fix revealed

click here

Many thanks to everyone involved. HAVE FUN!
 
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2015-04-28 08:13
AmiDog

Registered: Mar 2003
Posts: 97
@Groepaz: I doubt that, since it probably wouldn't pass his "install by girlfriend test" which prevented an internal ACA500 for example. And this most likely wouldn't be any easier to install for said girlfriend...
2015-04-28 08:18
ChristopherJam

Registered: Aug 2004
Posts: 1381
Ugh, phrasing. My wife's at least as capable as I am at installing hardware.

We've both dismembered various tightly packed laptops and small formfactor PCs to replace drives etc, and her soldering's a hell of a lot cleaner than mine is.
2015-04-28 09:47
ready.

Registered: Feb 2003
Posts: 441
@ChristopherJam: you said wife, AmiDog was talking about girlfriend. Probably you wounldn't have married her if she did not pass the girlfriend test.
2015-04-28 11:00
chatGPZ

Registered: Dec 2001
Posts: 11145
AmiDog: a much more important reason is that it will not work the same on different board revisions, and require soldering with some of them. ie: support nightmare.
2015-04-28 12:35
Perplex

Registered: Feb 2009
Posts: 254
Quoting Bob
o/ I can go hay wire on VSP now.. no limitations o/


In what way have you been limiting yourself up until now? :-)
2015-04-29 06:38
AlexC

Registered: Jan 2008
Posts: 293
Quote: AmiDog: you can bet on that if such simple adapter solution would be possible, jens would have made a product out of it :)

"Is there anywhere a list of releases using VSP?"
ugh, no. that'd be a huge list =) however, the problem even exists for programs that dont actually use VSP, but simply switch $d011 without synchronizing to the beam - which may or may not trigger the bug (with a roughly 1:312 chance)


I never took a while to think about it but you are obviously right. Anyway I still wonder how many releases are being hit by VSP issue. In case of demos I doubt there is a lot of software not synchronizing with beam.
2015-04-29 13:02
chatGPZ

Registered: Dec 2001
Posts: 11145
you can almost bet on that a random program that uses raster irq does a non synced write to $d011 somewhere at the beginning :)
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