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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: countzero on March 26, 2005, 10:32:05 AM

Title: Amiga 500 1mb chip ram hack
Post by: countzero on March 26, 2005, 10:32:05 AM

I am interested in doing this (http://www.savel.org/old/amiga/upgrade.html) 1mb hack for the a500. I had a dead rev6 board (it was booting, but doesn't read anything from floppy), so I got the rams from there. however, later I realised that my soldering iron was 60w. And I think I damaged some of the memory chips. So I'm not sure if I should go on installing these chips into the working board. what should I do ? Can I find other chips from other hardware ? Has anyone done this hack before ?

Title: Re: Amiga 500 1mb chip ram hack
Post by: Tahoe on March 26, 2005, 11:19:12 AM

Best thing is probably putting some sockets on the empty places. i did this once, one mem chip was bad. Frustrating as h*ll to rip it out again. If you just solder in some sockets you can easily switch the ic's if one of them doesn't work.

Title: Re: Amiga 500 1mb chip ram hack
Post by: Generale on March 26, 2005, 11:38:10 PM

Sockets are good. Yes.
If you want to get fancy, get the machined pin ones. Personally I prefer the standard ones.

Are you getting the dead chip ram error on startup?

Title: Re: Amiga 500 1mb chip ram hack
Post by: TjLaZer on March 27, 2005, 08:39:19 AM

Wasn't there more to just soldering in 4 more chips and cutting 2 traces?  Like adding 4 more caps or something?

Title: Re: Amiga 500 1mb chip ram hack
Post by: countzero on March 28, 2005, 11:09:08 AM

yes, do i need to add 4 more caps ? I'm not(edit) sure what is a cap, but there are orange like diode - thingies for each original ram chip. do i need to add those as well ?

and how does the dead ram error look like ? power led blinking ?

Title: Re: Amiga 500 1mb chip ram hack
Post by: Amiga1200PPC on March 28, 2005, 11:23:23 AM

For shure you have to add some capacitors.
The orange ones are ceramic type caps, I guess.