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    Two steps forward, one step back. I managed to...

    Two steps forward, one step back.

    I managed to get the game all assembled and working...


    https://youtu.be/2ki4weFFnmc

    ...however it now resets whenever I coin it up, or use the service...
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    Progress has been made on the Taito Lamp Board...

    Progress has been made on the Taito Lamp Board Controller repair.

    The Lamp Controller Board uses ground and 5V DC to trigger a 100V AC feed through a set of solid-state relays. These relays are...
  3. [QLD] - Sorry folks. I've been delayed and not sure if I...

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    Spent a bit of time on this tonight. As per...

    Spent a bit of time on this tonight. As per another thread, I was trying to figure out if I had a bad connection between the address lines of one of the Z80 derivative chips (IC22) to the SRAM...
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    I ended up repairing the address line as...

    I ended up repairing the address line as indicated in the diagram above. No change to the line in the display - that went away by itself. I even de-soldered the repair I made to see if the address...
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    SRAM is new. I think I lifted a track when...

    SRAM is new. I think I lifted a track when removing the old chip. I replaced the connection between A9 on the SRAM and A9 on the 27C512 but must have lifted part of the trace where it goes to the cpu...
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    Here is a pic of the part of the circuit board....

    Here is a pic of the part of the circuit board. It's from the Captain Zodiac I posted a repair log on. I probed some of the other address lines and it looks like a few of them are wired like I...
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    Z80 / SRAM / EPROM address line question

    I'm trying to locate a possible broken trace between a Z80, 8x8K SRAM and a 27C512. Am I right in thinking that a Z80 address line will run to the corresponding address lines in both the SRAM and...
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    Taito Captain Zodiac Repair Log

    I've been working on this board for yonks and finally made some progress tonight.

    Overview of the board:
    Early 90's era Taito punching game which runs a dot matrix display. Some similar hardware...
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    Womble - do you perceive any harm in trying a...

    Womble - do you perceive any harm in trying a 6264?
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    I ended up getting a refund for the chips so I'll...

    I ended up getting a refund for the chips so I'll find another seller with the correct ones.
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    It was.

    It was.
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    Cheers - I ordered the LH516D-10L but got sent...

    Cheers - I ordered the LH516D-10L but got sent the SH5168-10L instead. :(
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    They are Sharp LH5168D-10L Skinny chips. 8K x...

    They are Sharp LH5168D-10L Skinny chips.

    8K x 8, 100ns CMOS.
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    Wide to narrow IC DIP Socket Adapter.

    So - ordered some very uncommomn SRAM chips and found that they are the normal width chips (15.2mm leg width) as opposed to the narrow width chips (7.6mm) that the board had originally.

    Given...
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    I went through thr process of trying to locate...

    I went through thr process of trying to locate the original wheels and covers and found that I could only source them secondhand via Ebay USA. You may have better luck with it the I did though.
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    Small update. The gun vertical scrolling issue...

    Small update. The gun vertical scrolling issue was resolved by changing the gun sensors board.
  18. [QLD] - Sounds good. What dates?

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    The no sound would be caused by plugging a Jamma...

    The no sound would be caused by plugging a Jamma board into the MVS harness. The graphics glitch is likely something related to the board itself.
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    That connector is for the credit board. The four...

    That connector is for the credit board. The four slot and six slot boards have connectors for this. I'm not sure about the other Neo Geo boards.
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    Howdy - This is the arcade version of The House...

    Howdy - This is the arcade version of The House of the Dead. The original HOTD does not use IR sensors. It's similar to Virtua Cop 2 in that it uses the Sega Type 1 Guns. IR Sensors were introduced...
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    Thanks Jomac - yes this is tube #3...

    Thanks Jomac - yes this is tube #3 . I've had a go at adjusting the purity, but I get the feeling that all of the tubes I have are tired.




    In this video, the signal is plugged in to the gun...
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    I took the monitor out to try adjusting the sync...

    I took the monitor out to try adjusting the sync post as suggested on another forum. No luck but this video better shows the issue.


    https://youtu.be/KL-ydzGK3m4
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    I don't believe so. Jomac sent me one of his...

    I don't believe so. Jomac sent me one of his working ones.

    - - - Updated - - -



    This looks like a really good long-term solution. I'm annoyed that there still isn't a good replacement for...
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    I thought the same except it's the exact same...

    I thought the same except it's the exact same type of Hitachi tube on the original Nanao MS9
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