Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: broken on July 30, 2006, 09:05:45 PM

Title: Rev 6 A500 memory expansion
Post by: broken on July 30, 2006, 09:05:45 PM

Ok, picked up a nearly brand new A500 from a thrift store. It honestly looks like someone took it out the box, played with it for a while, put it back in the box and then stored the box in their closet for the last 15 years. Its the best A500 I have had the pleasure of seeing. Hardly a spec of dust anywhere.


Opened it up and found a 501 ram expansion in the belly and it has a Rev 6 motherboard in it.

My Question is: Is there still a source for those memory chips to bump the 512k chip ram up to a full megabyte?
Something other than killing another A500 to take the memory out of?


I have read on the web that my A501 ram board will no longer work once bumping the ram up to 1 meg on board, but are there any other downsides/catches that I should be aware of? Will one of the Baseboards still work with this mod?


Also, any suggestions on other chip upgrades I should make to it?

Title: Re: Rev 6 A500 memory expansion
Post by: 1NOM155 on July 30, 2006, 09:14:42 PM

i fink, will work just fine, pay atention on de batery.

Title: Re: Rev 6 A500 memory expansion
Post by: zipper on July 31, 2006, 09:35:40 AM

You can turn that fast ram into chip ram by making two changes to the mobo - opening a jumper (=cutting a track) and closing another (on 3-part JP2, cutting the lower and joining the upper). On JP 7A (3-part) you have to cut the track between the lower and middle pad. That's it. Precludes that your Agnus is 1 MB capable - most probably it is; for example SysInfo shows it.