Amiga 2000 CIA chips

Signman · 23 October 2017, 22:15

My light gray screen boot problem continues.
I have read more than a few times this could be a CIA chip problem.
Does the 2000 take the same ones as the 500?

There is mention of odd and even but they are marked both the same on the 2000. If the 2000 doesn't take the A500 version where do I acquire them?

Daedalus · 23 October 2017, 23:36

They're the same across those machines, and also the same as each other. Odd and even refers to their function in the Amiga (specifically their addresses), but the chips themselves are identical.

Signman · 24 October 2017, 00:02

Much obliged Daedalus.
(Dublin then Glasgow eh? Sounds like my distant relatives path before getting on that long boat ride)

Sanxion · 24 October 2017, 19:44

Why don't you try the DiagROM? It hasn't helped me to identify the cause of my grey screen, but it may help you.

Signman · 24 October 2017, 20:23

Assuming I acquire a Diagrom what next?
I read it outputs to the serial port, how do I read that?
Is the diagnostic information something a novice can understand or is for technical people?

Sanxion · 24 October 2017, 20:29

The output does appear on the screen too assuming the ROM is able to write to it. As for the inforrmation which is displayed, I cannot comment as nothing appeared when I tried it.

It is merely a suggesttion and if it does work, the diagnostic information may lead you in the correct direction.

Daedalus · 24 October 2017, 22:14

Yeah, it's more for technical people really, but can give a good indication of a fault if the machine is running well enough to get the menus. It includes CIA testing routines, though if you've swapped them with a working 500 then you'll rule them out as being the issue.

23 October 2017, 22:15	#1
Signman Registered User Join Date: Sep 2016 Location: Michigan Posts: 384	Amiga 2000 CIA chips My light gray screen boot problem continues. I have read more than a few times this could be a CIA chip problem. Does the 2000 take the same ones as the 500? There is mention of odd and even but they are marked both the same on the 2000. If the 2000 doesn't take the A500 version where do I acquire them?

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23 October 2017, 23:36	#2
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	They're the same across those machines, and also the same as each other. Odd and even refers to their function in the Amiga (specifically their addresses), but the chips themselves are identical.

24 October 2017, 00:02	#3
Signman Registered User Join Date: Sep 2016 Location: Michigan Posts: 384	Much obliged Daedalus. (Dublin then Glasgow eh? Sounds like my distant relatives path before getting on that long boat ride)

24 October 2017, 19:44	#4
Sanxion Registered User Join Date: Jul 2017 Location: England Posts: 138	Why don't you try the DiagROM? It hasn't helped me to identify the cause of my grey screen, but it may help you.

24 October 2017, 20:23	#5
Signman Registered User Join Date: Sep 2016 Location: Michigan Posts: 384	Assuming I acquire a Diagrom what next? I read it outputs to the serial port, how do I read that? Is the diagnostic information something a novice can understand or is for technical people?

24 October 2017, 20:29	#6
Sanxion Registered User Join Date: Jul 2017 Location: England Posts: 138	The output does appear on the screen too assuming the ROM is able to write to it. As for the inforrmation which is displayed, I cannot comment as nothing appeared when I tried it. It is merely a suggesttion and if it does work, the diagnostic information may lead you in the correct direction.

24 October 2017, 22:14	#7
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	Yeah, it's more for technical people really, but can give a good indication of a fault if the machine is running well enough to get the menus. It includes CIA testing routines, though if you've swapped them with a working 500 then you'll rule them out as being the issue.

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