Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: dougal on February 25, 2012, 08:46:33 AM

Title: Getting 1MB Chip ram from a rev4 A2000
Post by: dougal on February 25, 2012, 08:46:33 AM

This is probably old news, but i found this guide on how to mod an A2000 Rev4.x to get 1MB Chip Ram.

It involves replacing the Agnus and cutting/opening 2 trace jumpers and switching another jumper.

It worked great on my Rev 4.4 A2000. I did not even know there was 512K Fastram onboard as it must have been disabled at some point. Anyway it is now addressed as chipram giving me a total of 1MB Chipram.

Here you go:

http://www.nightfallcrew.com/30/09/2010/amiga-2000-pal-rev4-5-battery-1mb-chipram-upgrade/

Title: Re: Getting 1MB Chip ram from a rev4 A2000
Post by: spaceman88 on February 25, 2012, 01:57:18 PM

There was a similar hack for some Rev. of the A500. I did it to mine in the early 1990's, the only difference was you used the trap door RAM for the other 512k.

Title: Re: Getting 1MB Chip ram from a rev4 A2000
Post by: dougal on March 12, 2012, 06:38:50 AM

Ooops wrong thread

Title: Re: Getting 1MB Chip ram from a rev4 A2000
Post by: magnetic on March 12, 2012, 09:21:44 AM

Pretty cool Dougal. Thanks