Arcadecollecting's ztx.zip rom is same with MAME Zeroteam set3.. and ztx file is batter-free rom.. not need battery for PCB working
These repair roms are 4 eproms.. U23 U24 U25 U26 very similar with ztx roms.. but CRC is different any other MAME rom set... and with just these roms. the PCB does not work..
When Zeroteam's battery is discharged.. Ram is erased and PCB does not work..
For repair... replace new working battery and replace U23 U24 U25 U26 roms than 4 repair memories... And PCB's power on about 1min.. with just these repair roms..The PCB do not work... (but ztx' PCB is working and battery is needless)
after shut down PCB's power.. remove 4 repair memories.. U23 U24 U25 U26.. then.. insert 4 Original battery need roms..
now PCB is working..
I think this memories write erased RAM.. maybe 4 repair memories have RAM's contents..
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Re: Zeroteam Repair memory dumped?
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