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Thread: OpenAmiga600RamExpansion: A600 1 MB Chip RAM Expansion with Clock

  1. #1
    SukkoPera's Avatar
    Join Date
    Nov 2017
    40 (100%)

    Exclamation OpenAmiga600RamExpansion: A600 1 MB Chip RAM Expansion with Clock

    Up for sale is OpenAmiga600RamExpansion, my interpretation of a 1 MB Chip RAM Expansion for the Commodore Amiga 600 with optional Real Time Clock.

    It's my own design, please refer to for more information. It has seen quite a bit of testing and always performed very well, even on Vampire 600 systems.

    It uses inexpensive SOJ-40 DRAM chips, which can be easily found on eBay or AliExpress. See the project page for a compatibility list.

    Click image for larger version. 

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    What I'm selling here is either the bare PCB or a kit including the PCB and all the needed components.

    Bare PCB (You provide all components): 4€
    Base Component Kit (Includes trapdoor connector and caps): +4€
    Led Kit (Adds a power led, not that useful, choose among red, green, yellow, blue, white or orange): +0,50€
    RTC Kit (Includes everything to make the RTC work EXCEPT CR2032 battery): +4€
    Couple of tested RAM chips: +7€

    The Base Component Kit includes:
    - 1xTrapdoor Connector
    - 6x100nF 0805 Capacitor

    The Led Kit includes:
    - 1x0805 Led
    - 1x0805 Resistor

    The RTC Kit includes:
    - 1xRTC62421 Chip
    - 1x18-pin Socket
    - 3x10K 0805 Resistor
    - 2x220 0805 Resistor
    - 1x100K 0805 Resistor
    - 1xBAT54C Diode
    - 6x100nF 0805 Capacitor
    - 1x10uF 1206 Capacitor
    - 1xCR2032 Holder

    RTC chips are second hand "pulls" but are tested individually before shipping, so you are guaranteed to get a 100% working kit.

    Note that the final, soldered, ready-to-use product is NOT on sale. The kit requires that you do the soldering and is not suitable for the faint-hearted, since it requires soldering some surface-mount components in the 0805 and SOJ-40 packages.

    Payment methods accepted:
    PayPal Family & Friends (or add commissions), Bank Transfer, Satispay (for Italian buyers)

    Items will ship worldwide from Italy. All shipments will be trackable and at cost
    . As a rule of thumb, shipping of a single kit should be 3,50€ to Europe, 4,50€ to the US and 5,50€ to Africa, Asia and Australia. Add 6€ for tracked & signed for. Ask for exact quote.

    Item is also on sale elsewhere.

    Feel free to ask any questions.

    My Sales:

    Last edited by SukkoPera; 16th May 2019 at 09:33.

  2. #2
    b00mer's Avatar
    Join Date
    May 2013
    29 (97%)


    Very nice, like all your projects. A question unrelated to your sale. Is it possible to make a hybrid RAM expansion, so that you could change between additional CHIP or (slow) FAST RAM? The latter would be helpful for compatibility with older software, and you would not require the 2nd expansion board (on CPU) for that.

    God job!

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