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channelmaniac

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channelmaniac last won the day on December 16 2021

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    Texas
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    Chicago Gayety puck bowler, Neo Geo 2 slot, Greyhound crane, JROK Multi-Williams, Merit Megatouch upright, and an upright MP3 touchscreen jukebox I built.

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  1. channelmaniac
    Swap the A board out and see if the problem goes away. The CPS-A-01 is a custom chip and, unfortunately, a high failure item.
  2. channelmaniac
    To close this out... I was asked for 'a picture or 2 of the PCB', sent that in, and received a reply of "Thanks a lot! This is now added and will appear in MAME 0.239, as we're too late for 0.238."
  3. channelmaniac
    Depends on the board set it's based off of. There were multiple game boards used for Wonder Boy. One is based on Choplifter.
  4. channelmaniac
    Go here for a list of crosses for those PROMs. https://www.mikesarcade.com/cgi-bin/spies.cgi?action=url&type=info&page=PromRef.txt You *CAN* substitute an Open Collector for a Tri-State in many cases *if* you have the outputs tied to +5v with resistors, typically between 1K to 2.2K ohm.
  5. channelmaniac
    Here are the 2 entries for the PCBs I resurrected. One had no ROMs at all, some corrosion, and attempted repair damage (pulled plated thru holes.) The other had no Sound Program ROM, 4 missing 2148-55 Sprite RAMs, and a missing 74LS163 chip.
  6. channelmaniac
    The name is perfect as they are hell to work on. I had 2 here that were partially parted out... One had no ROMs and all the sprite and background ROM sockets corroded up plus some damaged traces under the dual port RAM. The other had one bank of 2148 Video RAM and a 74ALS163 removed and traces damaged. They both were set to use 23C1000 Mask ROMs for graphics. One that had the ROMs had 27C010 installed for the 2 Program ROMs while the other one was jumpered for 23C1000 Mask ROMs. Comparing those jumpers, I decoded all the jumpers on the board for all three banks of ROMs. Here's a copy from my repair log entry I did tonight: Enjoy! ---------------------- Model: Hellfire Tip: Jumper settings for ROMs O = Jumper Open C = Jumper in place Main Program ROMs: 23C1000 ROM: JP1 O, JP2 C, JP3 O, JP4 O 27C301 EPROM: JP1 O, JP2 C, JP3 C, JP4 O 27C010 EPROM: JP1 C, JP2 O, JP3 O, JP4 C Background ROMs: 23C1000 ROM: JP5 C, JP6 O, JP7 O, JP8 O 27C301 EPROM: JP5 C, JP6 O, JP7 O, JP8 C 27C010 EPROM: JP5 O, JP6 C, JP7 C, JP8 O Sprite ROMs: 23C1000 ROM: JP9 O, JP10 O, JP11 C, JP12 O 27C301 EPROM: JP9 C, JP10 O, JP11 C, JP12 O 27C010 EPROM: JP9 O, JP10 C, JP11 O, JP12 C These jumpers affect the whole bank. Take caution when desoldering the power and ground traces on this PCB. They are very heavy and hard to desolder cleanly.
  7. channelmaniac
    Never mind... found it thanks to the Internet Wayback Machine. It had a good version of the page from last year with the email address for submitting the code dump. 🙂 Super Space Invaders 91 (Majestic 12) US Region, complete with the "Don't do Drugs" screen and legal warning about US use only has been submitted!
  8. channelmaniac
    Repaired a PCB tonight with a US region ROM version that isn't in MAME... and the site with the submission info is borked. https://wiki.mamedev.org/index.php/Submitting_Source_Code Can anyone PM me the email address to submit the ROM dump?
  9. channelmaniac
    Depending on the model, it might not be repairable. If it has a surface mount Z80 chip the only source would be a donor Sega Game Gear. Luckily those are on very few models and most use standard 40 pin DIP Z80A CPUs. 🙂 Usually the problem is a dead Z80 CPU. Do you get the same error with no cartridge(s) plugged in?
  10. channelmaniac
    Paging @Womble
  11. channelmaniac
    Hey boss, those TI chips rust because they are built like Namco customs - steel legs with silver plating on them.
  12. channelmaniac
    Yeah, if the music works then your Z80, YM2151, and the HA13001 are all working and don't need replacing. That leaves the OKI chip, the 2 sound sample ROMs on the B board, the interconnect between A and B board, and the passive components around the OKI.
  13. channelmaniac
    Unfortunately, you'll need another boardset to swap things around to narrow it down. The C boards are common failure points as is the custom chip on the A board.
  14. channelmaniac
    Not a super cap... When that goes out your sound settings are forgotten and don't match what's in the EEPROM... They usually end up at full blast. Hold down the volume down button while you turn on the game and hold it until you see the splash screen. That will reset tha audio. It happens sometimes when you swap carts around. BTW: This is Capcom CPS2, not System 11.
  15. channelmaniac
    A Unibit / Stepped bit works as well, but you have to be very careful the hole doesn't go offcenter.
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