NEO-CMC

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"CMC42" chip on a MVS cartridge. Picture courtesy of [MVS-Scans].

Most infos from [MAME:neocrypt.c]

C and (merged) S ROM banking and decryption chips found on CHA cartridge boards, in two (?) versions:

  • "CMC42": 90G06CF7042
  • "CMC50": 90G06CF7050 (can also be used to decrypt M1 ROMs)
File:Brd cmcnoref.jpg
"CMC50"

Also found on ROM-only arcade boards, without the "NEO-CMC" marking.