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Old 27 March 2010, 15:30   #1
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Sound speed issues.


I'm new to the forum and couldn't find any help with search.

So I have rev.5 A500 with GVP HD8+ (2 Mb RAM) and 512 kb in the trapdoor slot. I installed Kickstart 3.1 and made 1 Mb Chip-RAM mod (8372A Fat Agnus from my old broken rev.6 A500) .

The problem is that now I get increased (too fast) sound speed in most games. I turned the chip-RAM extension off but it didn't solve the problem. So I assume that the problem is with the KS 3.1. Is there anything I can do to solve this or do I have to get a KS switch as I also have KS 1.3?

The second problem or more of a question is that is it possible to save the boot options so that it always boots in PAL-mode as now I have to always go to boot menu and set the PAL-mode on.

Last edited by Hemppo; 27 March 2010 at 15:44.
Old 27 March 2010, 18:17   #2
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 46
Posts: 24,862
Rev.5 does not have PAL/NTSC jumper JP4. AFAIK you need to bend Agnus PAL/NTSC pin or cut some difficult to reach trace.
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Old 28 March 2010, 15:04   #3
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Originally Posted by Toni Wilen View Post
Rev.5 does not have PAL/NTSC jumper JP4. AFAIK you need to bend Agnus PAL/NTSC pin or cut some difficult to reach trace.
Thanks mate! I insulated Fat Agnus pin 41 with match stick and it solved both of the problems! Sound speed is now normalized and the machine boots always in PAL-mode!

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