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Thread: CDTV 256k/512k RAM Expansion

  1. #1
    Inactive Member hikey's Avatar
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    Default CDTV 256k/512k RAM Expansion

    256k/512k Non-Autoconfig RAM expansion for CDTV.
    Uses address range $E00000 -> $E7FFFF
    Plugs into the 40 way header occupied by the front panel memory card reader.
    For 512k operation it is necessary to close JP16 on the CDTV Motherboard

    Quantity Available: 1
    Price: 25

    Shipping (untracked): UK... 3.00
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    gounderset.. Item sent 9/4/2014
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    Last edited by hikey; 8th February 2015 at 22:51.

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    Dancing with bridgeboards Amibayer! BlindGerMan's Avatar
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    Declaring interest in one of them, will pm later...
    A2000 2/128/-MB-OS3.9-DKB Wildfire-Picasso IV+Concierto+PabloII+Paloma-Deneb-A2386@TI486SLC2/66-ATI Mach64-Tekram DC600T
    A2500/30 2/112/6MB-OS3.1-A2630+BigRAM2630-A2091-A2410-A2065-A2286-A2320
    A1200 2/256/-MB-OS3.9-Blizzard 1230IV/SCSI-IDEfix Express-Indi AGA MkIIcr


  3. #3
    Inactive Member kxbx's Avatar
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    These are made with modern memory chips and a single GAL? Could you read off the part number on the memory ICs, if you don't mind?

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    Inactive Member hikey's Avatar
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    Quote Originally Posted by kxbx View Post
    These are made with modern memory chips and a single GAL? Could you read off the part number on the memory ICs, if you don't mind?
    The part number is K6X4008C1F-BF55

  5. #5
    Inactive Member kxbx's Avatar
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    Quote Originally Posted by hikey View Post
    Quote Originally Posted by kxbx View Post
    These are made with modern memory chips and a single GAL? Could you read off the part number on the memory ICs, if you don't mind?
    The part number is K6X4008C1F-BF55
    Cheers So the DRAM is replaced by SRAM, I guess the GAL takes care of the different modes of addressing. I wonder if this could be done for other Amigas.

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    It can.

    http://eab.abime.net/showthread.php?t=71223

    Quote Originally Posted by kxbx View Post
    Quote Originally Posted by hikey View Post
    Quote Originally Posted by kxbx View Post
    These are made with modern memory chips and a single GAL? Could you read off the part number on the memory ICs, if you don't mind?
    The part number is K6X4008C1F-BF55
    Cheers So the DRAM is replaced by SRAM, I guess the GAL takes care of the different modes of addressing. I wonder if this could be done for other Amigas.

  7. #7
    Inactive Member kxbx's Avatar
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    Quote Originally Posted by Yulquen74 View Post
    It can.

    http://eab.abime.net/showthread.php?t=71223

    Quote Originally Posted by kxbx View Post
    Quote Originally Posted by hikey View Post

    The part number is K6X4008C1F-BF55
    Cheers So the DRAM is replaced by SRAM, I guess the GAL takes care of the different modes of addressing. I wonder if this could be done for other Amigas.
    This is interesting. I have an a500 trapdoor expansion on the way but I may try and build a clone with modern parts.

    e: looks like this was done recently http://www.techtravels.org/amiga/amigablog/?page_id=942

    Anyway, sorry for derailing this thread.
    Last edited by kxbx; 8th April 2014 at 15:55.

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    gounderset's Avatar
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    Hi!
    Im interested in one piece. Sending you a PM

    Geir Ove

    ---------- Post added at 19:50 ---------- Previous post was at 18:10 ----------

    Money is sent for one Board

    Geir Ove

  9. #9
    Amibayer! limboy777's Avatar
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    Hi Hikey

    I have bought a few CDTV bits of you before and I have always been happy. Can you tell me if this is compatible with your 4mb expansion I bought recently. In this CDTV I have Thomthuls 4mb memory in between the 68010 processor.

    I have also another CDTV which I plan to install Kippers 8mb IDE board and Megachip expansion. Will this be compatible with this?

    Is this essentially what the front of the CDTV memory is but not in card format? Hopefully if the answer is that I can use this with my CDTV setups , I will take one!

  10. #10
    gounderset's Avatar
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    Package received and is working perfect Leaving feedback now.

    Best regards
    Geir Ove

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