Expand memory beyond 1MB (with ACA500plus)

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Don't Panic. Please wash hands.
  • My first thread in this forum - trying to catch up with Amiga 500 that I stopped using 1990/91.


    This question is probably already answered in previous threads, but not to my understanding. So therefore it comes again :rolleyes::


    First of all, my recently purchased ACA500plus is awesome. By far the best purchase I've done to my retro setup.


    When using WHDLOAD I sometimes get a kind of "low memory error" when trying to load games which requires 1,5MB. This is expected since I've only got an factory equipped A500 rev 6A and a 512Kb trapdoor expansion.


    What would be the best and easiest way to expand the memory to run such games?:/


    Thanks for any help

    Kind regards

    Tintin

  • You need to make a difference between fastmem and chipmem. The ACA500plus provides fastmem - way more than the 1.5M that you're quoting here. However, it may be that certain games require 1M Chipram, which is possible on the A500 without jumping through too many hoops, but if you hare using WHDload, you have the WB screen occupying part of the chip ram. I assume that the 1.5M requirement is really "1.5M chip ram", which only ACE2 can give you.


    Since you have a Rev.6a and a trapdoor expansion, I expect the standard 3.1-optimized config (F1 in the startup menu) to also give you 1M chip ram (trapdoor expansion will be relocated to $08.0000 in that case, no soldering required). This *should* be good for the vast majority of games.

  • You need to make a difference between fastmem and chipmem. The ACA500plus provides fastmem - way more than the 1.5M that you're quoting here. However, it may be that certain games require 1M Chipram, which is possible on the A500 without jumping through too many hoops, but if you hare using WHDload, you have the WB screen occupying part of the chip ram. I assume that the 1.5M requirement is really "1.5M chip ram", which only ACE2 can give you.


    Since you have a Rev.6a and a trapdoor expansion, I expect the standard 3.1-optimized config (F1 in the startup menu) to also give you 1M chip ram (trapdoor expansion will be relocated to $08.0000 in that case, no soldering required). This *should* be good for the vast majority of games.

    Thank you Jens for your answer!


    I'll survive for now. ACE2 will be written on my "todo"-list :D


    Kind regards

    Tintin