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retrobazar

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WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

Please send me prices including shipping to italy, I can pay by paypal or bank transfer. thank you!!!
 

Zetr0

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Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

you can use ANY double sided SIMM in the Chip Ram 72pin port and it should work... at the moment I have an 8MB (double sided) common 8MB SIMM being used as 2MB Chip

its all about the memory matrix (arangement of X and Y cells not keanu reeves thingy)

Imagine a spreadsheet,

Some are organised in a WIDE Matrix i.e. more X rows than Y columns
Some are organised in a NARROW Matrix, i.,e. more Y columns than X rows
but most are organised in a SQUARE Matrix i.e. equal number of X/Y rows/columns

you need a 72pin simm that is a SQUARE Matrix , there common as to be honest.
 

retrobazar

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Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

I mounted 8MB simm and works... but encountered a problem: the first attempt the workbennch boots but freeze at the end... I reset by keyboard and the workbench boots and works fine... can you help me? :sigh:
 

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Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

I can certainly try.

have you another SIMM to test?

I would first start with just CHIP Ram, remove the fast and test the machine.

I would then begin to populate the memory ports one-by-one and seeing if you get that freezing problem... it does sound like a memory fault, personally I think it will be fast ram..

try that lot out first.. and see how you get on... if you get more problems, just open a post in the Service Bay and that way everyone can help :D
 

TheCorfiot

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Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

Re: WTB: 2MB SIMM for AMIGA 4000 CHIPRAM

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