Majestic 12 on SSI '91 hardware ?

Solder

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Should it be possible to convert a Super Space Invaders '91 board to Majestic 12 ?

They are supposedly the same game with some slight alterations. The hardware is supposedly fundamentally the same, yet MJ12 has a main board and a daughterboard while SSI '91 uses a single board design ............

SSI '91 uses 2 x 27C020's, while Maj12 uses 4 x 27C010's

In MAME:

SSI '91:

ROM_LOAD16_BYTE( "c64_15.ic9", 0x00000, 0x40000, CRC(3a6d591b)
ROM_LOAD16_BYTE( "c64_16.ic8", 0x00001, 0x40000, CRC(8a567a4f)


Maj 12:

ROM_LOAD16_BYTE( "c64-07.10", 0x00000, 0x20000, CRC(f29ed5c9)
ROM_LOAD16_BYTE( "c64-06.4", 0x40000, 0x20000, CRC(18dc71ac)
ROM_LOAD16_BYTE( "c64-08.11", 0x00001, 0x20000, CRC(ddfd33d5)
ROM_LOAD16_BYTE( "c64-05.5", 0x40001, 0x20000, CRC(b61866c0)



So in theory I could use the DOS 'copy /B' command to pair up the four binaries into two and program onto a couple of 27C020's to use on the SSI '91 board - but what order should they be joined in and what pairings?

Have so far tried:

c64-07.10 + c64-06.4
c64-08.11 + c64-05.5


But no luck.


Thanks
 
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