Announcement

Collapse
No announcement yet.

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

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • For Sale Megachip for A500, A2000, and CDTV (rj1307 project, Poland)

    10.05.2020 UPDATE:
    All units are sold out, please do NOT declare interest!

    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

Name:	2018-08-05 14.13.05.jpg
Views:	1
Size:	114.3 KB
ID:	1566552 Click image for larger version

Name:	2018-08-05 14.15.08.jpg
Views:	1
Size:	141.0 KB
ID:	1566553 Click image for larger version

Name:	2018-08-05 14.11.38.jpg
Views:	1
Size:	103.7 KB
ID:	1566551 Click image for larger version

Name:	2018-08-05 14.12.03.jpg
Views:	1
Size:	103.1 KB
ID:	1566554

    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

Name:	2018-08-05 14.22.26.jpg
Views:	1
Size:	131.5 KB
ID:	1566555 Click image for larger version

Name:	2018-06-17 16.27.33.jpg
Views:	1
Size:	94.1 KB
ID:	1566556 Click image for larger version

Name:	2018-08-05 14.24.30.jpg
Views:	1
Size:	181.3 KB
ID:	1566557
    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 01.01.2020 shipping is 8.50€ tracked and signed anywhere in the world
    5.50€ 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



    Last edited by DjCook; 10 May 2020, 11:36.
    8 Bit Dreams - computer & hardware repair in Germany

  • #2
    Declaring interest without Agnus and sending pm
    Last edited by scrappysphinx; 5 August 2018, 13:06.

    Comment


    • #3
      declaring interest in two without Angus

      How much is shipping to U.K. please
      Last edited by Timtheloon; 7 August 2018, 09:38.

      Comment


      • #4
        PM's are answered
        1√óMegachip is reserved for scrappysphinx
        8 Bit Dreams - computer & hardware repair in Germany

        Comment


        • #5
          1x Set WITH 8375 AGNUS included for me please

          Comment


          • #6
            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

            Comment


            • #7
              Payment sent for two

              Comment


              • #8
                Hi, declaring interest without Agnus

                Comment


                • #9
                  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

                  Comment


                  • #10
                    declaring interest for 1 kit without Agnus

                    Comment


                    • #11
                      Declaring interest for one without Agnus

                      Comment


                      • #12
                        PM with payment info was send to:
                        justme14 & a500guy
                        8 Bit Dreams - computer & hardware repair in Germany

                        Comment


                        • #13
                          Payment sent.

                          Comment


                          • #14
                            Payment Sent

                            Comment


                            • #15
                              Payment send

                              Comment

                              Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
                              Working...
                              X