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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Hemppo on March 27, 2010, 04:18:50 PM

Title: A500 sound and PAL issues.
Post by: Hemppo on March 27, 2010, 04:18:50 PM

Hi!

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.

Title: Re: A500 sound and PAL issues.
Post by: TjLaZer on March 27, 2010, 08:54:42 PM

Quote from: Hemppo;549922

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.

There are programs that will write a boot block that forces PAL or NTSC.  Look for InstallSwitch in Aminet.  Its a WB 1.x app tho, not sure if it will work on WB 3.1?

Title: Re: A500 sound and PAL issues.
Post by: Hemppo on March 28, 2010, 02:02:09 PM

Both problems are now solved. Insulating Fat Agnus pin 41 worked for both problems!

Title: Re: A500 sound and PAL issues.
Post by: ElPolloDiabl on March 28, 2010, 03:33:39 PM

I was gonna say you need make an adjustment. Rev 6 and up is a drop in replacement.