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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: raketa on July 27, 2009, 07:52:58 PM

Title: Advanced chipram adapter green screen
Post by: raketa on July 27, 2009, 07:52:58 PM

Hi,
I just bought a WAW Advanced chipram adapter for my A500, adapter is properly inserted and  both wires are properly connected to Gary, but all I get is just a green screen.
I tried 8375 Agnus alone and everything seems to be working fine.
Mobo is rev 8.A1.
Any ideas? TIA

Title: Re: Advanced chipram adapter green screen
Post by: zipper on July 27, 2009, 08:05:05 PM

It probably doesn't work on rev8 - the manual mentions rev3 to 7.

Title: Re: Advanced chipram adapter green screen
Post by: raketa on July 27, 2009, 08:47:00 PM

Hmm, thx zipper, you are probably right :(

Title: Re: Advanced chipram adapter green screen
Post by: save2600 on July 27, 2009, 09:00:12 PM

I wonder if cutting a trace near the 512k trapdoor expansion ram, like you have to do on some of the other revisions (rev 5 comes to mind) would work. Might be able to experiment and find a little known or never known A500 hack  :-)  

Maybe try disconnecting one of the jumpers to Gary or pulling up a certain pin. Sorry... guess it's just the tinkerer in me thinking out loud! lol

Title: Re: Advanced chipram adapter green screen
Post by: raketa on July 27, 2009, 09:41:03 PM

thx save2600, I even tried to connect it to pin 48 of 68k :) -> no success

I'll try it in my friend's A2000 tomorrow...

Title: Re: Advanced chipram adapter green screen
Post by: Zac67 on July 27, 2009, 10:12:27 PM

Ahem... a rev 8 mobo is an A500+ and as such is able to make use of 2 Meg chip ram ootb... (just add a 1 MB trapdoor card or add the chips by piggybacking them)

Title: Re: Advanced chipram adapter green screen
Post by: raketa on July 27, 2009, 10:23:04 PM

Yes, mobo is rev 8, but still ordinary A500, not plus.

Title: Re: Advanced chipram adapter green screen
Post by: FrankBrana on July 28, 2009, 01:22:39 AM

OMG!

By the way, any of ou happen to have an english version of the manual?

Title: Re: Advanced chipram adapter green screen
Post by: raketa on July 28, 2009, 10:52:14 PM

hmm, the same result - green screen - in A2000 :(