Midway Wolf conversions

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    • i was wondering on the tests where people have added the 32.768KHz crystal and the MK41T56N, have they replaced the u57 gal chip to match the game. given the proximity of the u57 to the MK41T56N. the u57 gal may be the logic to make use of the MK41T56N and the crystal when switching from games like mk3 to nba hangtime. also it appears the u57 gal is game specific. so it may matter that the gal match the game exactly to prevent errors (specifically the cmos errors seen in one of the earlier posts). I am just guessing and havent tested but was looking at my wolf board
    • I haven't replaced the GAL chip during my hangtime conversion. I guess U57 is sound section related because I once replaced it during a repair that the sound section was not working.

      Regarding UMK3 to XXX conversion, only the UMK3=>MK3 conversion worked for me. UMK3=> Hangtime, I suffered CMOs erros and periodic game hangs/resets. So I converted it back to UMK3 and sold the PCB as it is :)
    • ok wanted to include the correct GAL chips here:

      open ice u57 A-20255 (no MK41T56N)


      mk3/mk3u u57 A-20093 (no MK41T56N)


      Rampage u57 A-20255 (no MK41T56N)



      does anyone know the GAL chips for the other games?


      as for which games use which EPROMS and the GAL:

      4-rows (16x 8Mb graphics roms):

      2on2 open Ice Challenge: u118-u133 u57 A-20255 (no MK41T56N)
      Rampage World Tour: u118-u133 u57 A-20255 (no MK41T56N)
      WWF Wrestlemania: u118-u133 ?

      5-rows (16x 8Mb graphics roms + 4x 4Mb or 8Mb graphics roms):

      Mortal Kombat 3: u114-u117 (4Mb), u118-u133 (8Mb) u57 A-20093 (no MK41T56N)
      NBA Hangtime: u110-u113 (8Mb), u118-u133 (8Mb) ?
      NBA Maximum Hangtime: u110-u113 (8Mb), u118-u133 (8Mb) ?
      Ultimate Mortal Kombat 3: u110-u113 (8Mb), u118-u133 (8Mb) u57 A-20093 (no MK41T56N)

      The post was edited 4 times, last by rocket ().