ACA500+, Rev 5, 512kb Trapdoor - Do I still need to cut traces or modify the board with 8372A Agnus?

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Don't Panic. Please wash hands.
  • Dear Amiga Fans,


    I have a Rev 5 Amiga 500 with the Commodore 512KB trapdoor expansion, and about to order the ACA500+ board for it.


    I see in the Wiki that you can enable 1 MB of chipram with this combo and ACA500+ if you have an ECS Agnus.


    The question is - typically to enable more Chipram on Rev 5 + 8372/8372A you need to modify the board - cut traces and/or solder wires. Do I need to do this with the ACA500+? or can I just install an 8372A Agnus and the ACA500+ and achieve 1MB chip with that combo? (+ the commodore expansion)


    Thanks!

  • The question is - typically to enable more Chipram on Rev 5 + 8372/8372A you need to modify the board - cut traces and/or solder wires. Do I need to do this with the ACA500+?

    Not needed with the ACA500plus.


    or can I just install an 8372A Agnus and the ACA500+ and achieve 1MB chip with that combo? (+ the commodore expansion)

    Yes, that's all you need to do. Note that the computer will "normally" start in NTSC mode if you don't modify anything, but there is a menu setting "force PAL" in the ACA500plus that simplifies chip ram expansion to this easy level that you have described.

  • The display is correct: It sows what the computer has without the ACA500plus options. If you launch the system with F1, you'll automatically have the best config available, including 1M Chip ram.