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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Tymo500 on May 16, 2023, 01:30:56 PM

Title: Amiga 500/+ 2MB RAM expansion
Post by: Tymo500 on May 16, 2023, 01:30:56 PM

If somebody could send full BOM list for this expansion RAM.
I see the RAM chips 514256 4-bit x 256K by Vitelic.
>2 x capacitors on board
>8 x little capacitors
>4 x SIL8/ RESISTOR ARRAYS

and connector , of course.


Board is without clock module for Amiga 500 /512Kb
This version fitted for A500+ 1 MB RAM Expansion.

This expansion board is probably manufactured by AlfaData.

(https://i.ibb.co/x8XftNT/Alfa-Data-ra5-1mbplus-1-big.jpg) (https://ibb.co/G3nt4qS)
(https://i.ibb.co/k64CfY0/Alfa-Data-ra5-1mbplus-2-big.jpg) (https://ibb.co/sJKYGLQ)

Title: Re: Amiga 500/+ 2MB RAM expansion
Post by: giobbi on June 22, 2023, 12:58:03 AM

the caps close to the ICs usually are 100 nF (104). The resistor array should be 47 ohm (based on my RAM expansion). The electrolytic I don't know, but probably a 10 uF should be ok.