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Author Topic: Getting 1MB Chip ram from a rev4 A2000  (Read 3008 times)

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Offline dougalTopic starter

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Getting 1MB Chip ram from a rev4 A2000
« 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/
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A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD
A4000 040 @33Mhz -Kick 3.1 / 16MB
A2000 Rev4.4 - \'030 @25Mhz / 8MB / Kick 3.1 / ClassicWB
CD32 -     Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 / 2MB Chip / 2Mb Fast / 2.04/1.3 / A590 / A570
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
CDTV

PowerMac G4 1Ghz (MorphOS / Leopard)

[url]http://amigamap.com/us
 

Offline spaceman88

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Re: Getting 1MB Chip ram from a rev4 A2000
« Reply #1 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.
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Offline dougalTopic starter

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Re: Getting 1MB Chip ram from a rev4 A2000
« Reply #2 on: March 12, 2012, 06:38:50 AM »
Ooops wrong thread
« Last Edit: March 12, 2012, 07:45:38 AM by dougal »
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A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD
A4000 040 @33Mhz -Kick 3.1 / 16MB
A2000 Rev4.4 - \'030 @25Mhz / 8MB / Kick 3.1 / ClassicWB
CD32 -     Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 / 2MB Chip / 2Mb Fast / 2.04/1.3 / A590 / A570
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
CDTV

PowerMac G4 1Ghz (MorphOS / Leopard)

[url]http://amigamap.com/us
 

Offline magnetic

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Re: Getting 1MB Chip ram from a rev4 A2000
« Reply #3 on: March 12, 2012, 09:21:44 AM »
Pretty cool Dougal. Thanks
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Amiga 2000 Rom Switcher w/ 3.1 + 1.3 | HardFrame SCSI | CBM Ram board| A Squared LIVE! 2000 | Vlab Motion | Firecracker 24 gfx

Commodore CDTV: 68010 | ECS | 9mb Ram | SCSI -TV | 3.9 Rom | Developer EPROMs
 
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