Bootleg MVS boards
They exist ! Nightmare Tony's comment is [here].
Some pictures from http://mvs.gotwalls.com/
Bootleg MV1FZ
- Vertical board is soldered
- Normal DIP format 68k CPU
- Through-hole 5% resistors video DAC
- Custom chips are marked "A66" (NEO-B1 ?), "NO-03", "NO-5" (and a blank one)
- Original YM2610
- Uses a bunch of PALs
- Backup RAM saved by a supercap
Bootleg MV1FZ
- Uses the same "NO-03" and "NO-5" chips as above
- Gold nugget 16MHz 68k CPU !
- The "9817 870768593" chip is probably the same as "A66"
- Space for a QFPR clone of the YM2610 in U1A ?
- Uses a bunch of PALs
- RAM chips on the back side
- Backup RAM saved by a supercap
"Gobit" bootleg
- First gen chipset
- Vertical board is soldered
- Custom chips are marked "68C101", "68C202" and "68C303"
- Socketed Toshiba Z84 Z80 and Motorola 68k CPUs
- YM2610 clone named ECW08-4 ?
- 4 ROMs as in original MVS boards: BIOS, SFIX ROM, M1 ROM, LO
- Backup RAM saved by a supercap
"Goldstar" version
- First gen chipset
- Normal DIP format overclocked (!) 10MHz 68k CPU
- Through-hole 5% resistors video DAC
- Custom chips are marked "NEN0.4","007","NEN08","NEN09"
- Socketed original YM2610
- Backup RAM saved by a supercap