Announcement

Collapse
No announcement yet.

4164/41256 DRAM (memory) chips tester for C64 and more

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

  • Sold 4164/41256 DRAM (memory) chips tester for C64 and more

    DRAMBOARD V1.2 – 4164/41256 DRAM chip tester

    Test memory chips for the C64 (breadbin) quick and easy! 8x 4164 DRAM (8x8kB) are used in older C64:s.

    Arduino Nano-based DRAM (Dynamic RAM) tester for 4164* and 41256** type DRAM chips.

    User manual: http://docs.anemo.se/dramboard-manual.pdf (right-click to save)

    Availability:
    SOLD OUT - no new batch planned in near future

    Four loops with four memory verify tests are run:

    1. Fill with ones
    2. Fill with zeros
    3. Fill with alternating ones and zeros
    4. Fill with alternating zeros and ones


    • Test time, 4164: 40 seconds
    • Test time, 41256: 1 minute, 45 seconds

    • Duo color status LED:
    Green - Init & passed all tests
    Yellow/orange - tests running
    Red (blinking) test failed

    • Arduino current supply overcurrent protection (Polymer PTC self-resettable fuse)
    • Arduino output pins overcurrent protection (current limiting resistors, new for v1.2)
    • Serial monitor (9600 bauds)



    Pre-programmed Arduino Nano (socketed) and 30 cm mini-USB cable included. DRAM chip in pictures is NOT included

    Note! 4164 chips detected as working/defective has been verified in real C64. 41256 test mode is BETA as I haven't had the opportunity to test chips from multiple manufacturers. Tests are not 100% accurate (timing wise) and should be seen as an good indication.

    PRICE & PAYMENT:

    €31.5 including international UNTRACKED shipping
    €39 including TRACKED shipping

    Payment as gift via Paypal

    Drivers for the CH340 chipset is needed for serial communication: https://sparks.gogo.co.nz/ch340.html
    - - -



    Image above shows v1.0



    *4164 DRAM cross reference:

    MB8264-15 (Fairchild)
    MB8264A-15 (Fujitsu)
    HM4864, HYB4164P2BD (Hitachi)
    M3764A-15 (OKI)
    MT4264-25 (Micron)
    M5K4164AP-15, M5K4164 ANP-10 (Mitsubishi)
    MK4564N-20 (Mostek)
    MCM4164BP15, MCM6665BP20, MCM6665AP (Motorola)
    D4164C-2, D4164C-15, uPD 4164-1 (NEC)
    KM4164B-15 (Samsung)
    TMM4164 C-3, TMS4164-15NL, TMS4164-20NL (Toshiba)


    **41256 DRAM cross reference:

    TMS4256 (Toshiba)
    MCM6256 (Motorola)
    HM51256 (Hitachi)
    MB81256 (Fujitsu)
    HYB41256 (Siemens)
    KM41256 (Samsung)
    MSM41256 (OKI)
    uPD41256 (NEC)

    The boards are also sold elsewhere!
    Last edited by anemo; 28 August 2020, 06:02.
    A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

  • #2
    Declaring an interest in one unit shipped to the UK.

    Comment


    • #3
      Declaring an interest in one

      Comment


      • #4
        Originally posted by allenbailey View Post
        Declaring an interest in one unit shipped to the UK.
        PM sent with payment info.

        - - - Updated - - -

        Originally posted by bobymiller View Post
        Declaring an interest in one
        PM sent with payment info.
        A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

        Comment


        • #5
          Hi,
          looks like I've come too late to the party, but hopefully you'll make further batches. I have a few questions to the device:

          - Are all the pins to the DUT controlled by the Arduino or are any pins hardwired?
          - Is the source code open source.

          The reason I ask is because I'd like to expand the device to check other IC's which may have conflicting pinouts.

          Bryce.

          Comment


          • #6
            Originally posted by Bryce View Post
            Hi,
            looks like I've come too late to the party, but hopefully you'll make further batches. I have a few questions to the device:

            - Are all the pins to the DUT controlled by the Arduino or are any pins hardwired?
            - Is the source code open source.

            The reason I ask is because I'd like to expand the device to check other IC's which may have conflicting pinouts.

            Bryce.
            Hi,

            I will probably make a small batch (~10-20 boards) in the near future so more boards.

            I don't have the schematics available right now but it has been inspired by similar projects found online like these: http://www.chronworks.com/DRAM/, http://forum.defence-force.org/viewtopic.php?t=1699

            The supply voltage (Vcc) and GND are hardwired on my board and I've had a few requests expanding the chip types supported but I don't have the time for it right now.

            I might release my code and schematics as open source in the near future but it have to be maintained by somebody else in that case to take it to the next level.
            A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

            Comment


            • #7
              Thanks, maybe I'll look at making my own version where the supply voltage is selectable so that shorter RAM and Logic chips could be tested too.

              Bryce.

              Comment


              • #8
                Originally posted by Bryce View Post
                Thanks, maybe I'll look at making my own version where the supply voltage is selectable so that shorter RAM and Logic chips could be tested too.

                Bryce.
                44256 DRAM (C64C) support would probably be appreciated. But
                it's easier to test in the actual device with only two DRAM chips.
                A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

                Comment


                • #9
                  Payment received from allenbailey.
                  A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

                  Comment


                  • #10
                    Payment received from bobymiller. Will ship tomorrow morning.
                    A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

                    Comment


                    • #11
                      if you make more, count me in please
                      See www.amibay.com/entry.php?176-My-Offerings
                      Speed up the transaction ?? Post Interest & PayPal.me/mrr19121970 as family'n'friends and PM me with what you want and where to send it.

                      Comment


                      • #12
                        Originally posted by mrr19121970 View Post
                        if you make more, count me in please
                        Thank you for your interest! I will probably do a small batch the coming weeks.
                        A1200 | WB3.1 | 4Gb CF | ACA1233n/40+FPU | PCMCIA wifi card + C64 (-82 Breadbin) | C1541 | Pi1541

                        Comment


                        • #13
                          Interested in one piece if you make some more.

                          Comment


                          • #14
                            I wouldn't mind one either.

                            I also wouldn't mind one that could test 4256s/11000s (128kb)
                            VIC20-C64(2)-C64C-C128-C128D(CR)-1541(10)-1571(3)-1581(2)-SDuIEC-1750-Super1750Clone-TI99/4A-Amiga2000(030/33mhz/12mb)-A500(1mb) - A1000(2mb)-AppleIIe(4)-AppleIIgs(3)-Atari2600jr-Atari2600(woody)-ColecoGemini-Atari2600(Vader)-SearsVideoArcadeII-Atari7800-Intellivision-Colecovision(2)- ADAM-Odyssey2-NES-SNES(2)-GB-GBA-GBA(SP)-N64(3)-GC(3)-SMS-GG- Genesis(4)-SegaCD-Nomad-Saturn-Dreamcast-TG16(2)-TurboExpress-NEOGEO PocketColor-3DO-PS1-PS2-Atari800XL-Atari520STm-Atari600XL-CoCo3-Vectrex

                            Comment


                            • #15
                              Originally posted by SaviorX View Post
                              I wouldn't mind one either.

                              I also wouldn't mind one that could test 4256s/11000s (128kb)
                              It will never be able to test those due to the pin count and the hardwired VCC and GND, that's why I mentioned looking into developing an expanded version (see page 1) of my own.

                              Bryce.

                              Comment

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