Amiga 600 DiagRom CIA/IRQ Check Freeze

rjd324 · 17 May 2021, 22:24

Amiga 600, new capacitors.

When going onto the Diagrom CIA/IRQ tests the system freezes. Everything else, including memory, checks out.

When replacing Diagrom with a standard Amiga kickstart, boots up fine, but screen periodically freezes. Clicking on the mouse causes a freeze. These freezes last for about 1/2 seconds.

I suspect a bad CIA or trace connected, but I am wondering if someone can either back this up or refute it.

Thanks.

Jope · 18 May 2021, 08:24

Start by checking the tick signals make it to the CIAs. Pin 21.

17 May 2021, 22:24	#1
rjd324 Registered User Join Date: May 2020 Location: NE / UK Posts: 227	Amiga 600 DiagRom CIA/IRQ Check Freeze Amiga 600, new capacitors. When going onto the Diagrom CIA/IRQ tests the system freezes. Everything else, including memory, checks out. When replacing Diagrom with a standard Amiga kickstart, boots up fine, but screen periodically freezes. Clicking on the mouse causes a freeze. These freezes last for about 1/2 seconds. I suspect a bad CIA or trace connected, but I am wondering if someone can either back this up or refute it. Thanks.

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18 May 2021, 08:24	#2
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,863	Start by checking the tick signals make it to the CIAs. Pin 21.

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