norton9478 said:
(....) havent' tested my new unfixxed ROTD on any of my 2 slots (I have both the old and new versions.).
Norton, a bit off topic, but could you explain how old and new versions can be differenciated ?
I myself own 2 two-slot and noticed quite some differences
one is :
labelled MV2F
most chips were produced in 91-92 from what I can read on markings
has gold JAMMA connector
serial #310706 written in black at <B1> (close to the mem card reader)
SFIX (at <H10-11>) and SM1 (at <C5>) seem to be mask roms, by NEC
Cart slot connectors are split in two, which seems fragile to me
the other looks like this :
labelled MV2FS
most chips were produced from 93-96, according to the markings on the chips
has silver JAMMA connector
serial #047223 written in blue at <B1> too
SFIX and SM1 are EPROMS with silver labels and handwriting on them.
Cart slot connectors are not split in two on the whole length, hence the look more robust
Now if I consider dates on chips, I suppose MV2F is the granny, but then how come its serial is higher than the one of the MV2FS ? Could it be serials were not worldwide but by region and that one of these was US and the other one Euro ?
(BTW both play in English by default, but I installed Unibios on MV2FS.)
Is Eprom's presence there something common ? Soldering for these is factory perfect ...