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Thread: Megachip for A500, A2000, and CDTV (rj1307 project, Poland)

  1. #1
    8 Bit Dreams DjCook's Avatar
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    Default Megachip for A500, A2000, and CDTV (rj1307 project, Poland)

    Hello dear Amigans ,
    it's me - Viktor again. This time with something for A500, A2000 and CDTV
    Offer here some Megachip Upgrade modules designed by Rafał Jankowski (Poland).
    These fits nice into CDTV, but also in A500 and into A2000 .
    This upgrade expands Your existing ChipRAM with 1MB, this means You can reach the Maximum (2MB) of ChipRAM with it


    Please be aware, this upgrade is NOT for newbies and people without soldering skills,
    As it needs to remove original PLCC AGNUS socket to be able to install this upgrade!!!

    Fully tested - works on both: PAL & NTSC units!

    offering module's only (without 2MB Agnus), have also some 8375 Agnus IC's
    These expansions was tested with 390544-01 & 318069-10 (PAL) & 390544-02 & 318069-11 (NTSC) Agnus Chips,
    other AGNUS chips have different pinout and will not work!


    About installation:
    It is pretty the same technique Tuxbar81 used for his Megachips:
    http://www.amibay.com/showthread.php...light=megachip
    in other words it can be mounted into new goldpin socket or soldered directly on the A500 board if You plan to install accelerator board at some point.
    Please do not ask me to redesign it to use PLCC socket - i am not a creator of this expasion - just a person with soldering station!
    Click image for larger version. 

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    PROs:
    2MB of Chipram (since many WHDLoad games are starting in ChipRam instread of FastRam - these not run on regular A500, now You can run them!)
    Cheaper than original Megachip

    Contras:
    Desoldering of original PLCC Socket
    Does NOT support Genlock
    Actual 8375 AGNUS IC Price

    Click image for larger version. 

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    Quote Originally Posted by demolition View Post
    A20 can be found on Gary (U5) pin 36 or the CPU (U1) pin 48 so you could choose to connect the wire against one of these two pins. It is also connected to one of the pads in JP5 on A500 Rev 6 boards, but this is where the multimeter comes in handy as you can use the continuity test to verify against the known point on U1 which is A20 on all revisions.

    This is the schematic of A500 rev 6 and you can search for A20 to find the locations:
    https://www.amigawiki.org/dnl/schematics/A500_R6.pdf

    1x Set WITHOUT AGNUS : 35€
    1x Set WITH 8375 AGNUS included: 80€


    Shipping as always:
    from 01.01.2019 shipping is 7€ tracked and signed anywhere in the world
    4.99€ to Germany


    Also have some CDTV 8MB RAM - IDE boards:
    http://www.amibay.com/showthread.php...d-CDTV-RAM-IDE


    CDTV SCSI modules also coming soon

    thanks for Watching!

    - Your 8 Bit Dreams

    Batch I
    Lord - delivered (1x) with Agnus
    Scrappysphinx - delivered (1x)
    izi - delivered (1x)
    timtheloon - delivered (2x)
    justme14 - delivered (1x)
    a500guy - delivered (surface mail, no tracking) (1x)
    kgthomps - delivered (1×)
    TheCorfiot - delivered (1×)
    Jim_Oregon - delivered (1×)

    Batch II
    BigSupes 1x - delivered
    SukkoPera 1x - delivered
    optiguy 1x - delivered
    demolition 1x - delivered
    viserys23
    1x - delivered
    hlide 1x - delivered
    radfoo- delivered
    britlord - 1x - delivered
    britlord - 1x- delivered

    Batch III
    nairb131
    - 1x without AGNUS - delivered
    valfac - 1x without AGNUS - delivered
    breech - 2x without AGNUS - delivered
    Barbarian- 1x without AGNUS -delivered
    HAL2000 - 3x without AGNUS - delivered
    Crumb - 2x without AGNUS - delivered
    marchigianluca - 1x with AGNUS - delivered
    frost242 - 1x without AGNUS - delivered
    a500guy - paid for 2x, 1x with AGNUS - shipped
    kinchan - 2x with AGNUS - interested - payment received

    kgthomps - 1x with AGNUS - payment info sent

    Queue:

    Franko - 2x without AGNUS - interested
    cemi- 1x with AGNUS
    Paradroid90 - 1x without AGNUS



    dkedrowitsch - 1x COMPLETE WITH AGNUS (PAL)- payment details sent/no answer
    Overdoc - 1x without AGNUS- Payment info sent/no answer
    CRP - 1x - not interested anymore



    Last edited by DjCook; 21st April 2019 at 19:35.
    8 Bit Dreams - computer & hardware repair in Germany

  2. #2
    Confused retro man Amibayer!
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    Declaring interest without Agnus and sending pm
    Last edited by scrappysphinx; 5th August 2018 at 14:06.

  3. #3
    Amibayer! timtheloon's Avatar
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    declaring interest in two without Angus

    How much is shipping to U.K. please
    Last edited by timtheloon; 7th August 2018 at 10:38.
    I'm sailing the Ocean Waves, so my responses will be slow
    I'll get back to you ASAP, Internet is horribly slow at Sea!!

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    PM's are answered
    1×Megachip is reserved for scrappysphinx
    8 Bit Dreams - computer & hardware repair in Germany

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    1x Set WITH 8375 AGNUS included for me please

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    Quote Originally Posted by Lord View Post
    1x Set WITH 8375 AGNUS included for me please
    PM with payment info sent
    8 Bit Dreams - computer & hardware repair in Germany

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    Payment sent for two
    I'm sailing the Ocean Waves, so my responses will be slow
    I'll get back to you ASAP, Internet is horribly slow at Sea!!

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    Hi, declaring interest without Agnus

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    Payment received from:
    Timtheloon (2x Sets WITHOUT AGNUS IC)
    Lord (1x FULL Set)

    scrappysphinx (reserved, waiting for mayment)

    izi (PM with payment info sent)

    5 units left
    8 Bit Dreams - computer & hardware repair in Germany

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    declaring interest for 1 kit without Agnus

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