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nmk16.cpp: The new MCU based GFX decryption method is added for rest of games #12152

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merged 2 commits into from Mar 18, 2024

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sergiopolog
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@sergiopolog sergiopolog commented Mar 18, 2024

The new gfx decryption method and mcu dump are added to every game (and clones) which use it on the driver:

  • macross
  • gunnail
  • bjtwin
  • nouryoku

Internal ROM on NMK215 is the same for all games, so the dump already included for saboten is now added for the rest of the games.

Old method is still in use for bootleg clones in which the actual decryption process used is still not in-depth documented.

  • Also updated CPU clock for mustang (and clones) to proper value and added notes about bootlegs [hammy]

@cuavas cuavas merged commit 113a986 into mamedev:master Mar 18, 2024
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@@ -7758,6 +7808,10 @@ ROM_START( nouryoku )
ROM_REGION( 0x010000, "fgtile", 0 )
ROM_LOAD( "ic35.3", 0x000000, 0x010000, CRC(03d0c3b1) SHA1(4d5427c324e2141d0a953cc5133d10b327827e0b) ) // 8x8 tiles

ROM_REGION( 0x02000, "protcpu", 0 )
// has 'SABOTEN' for the game name string, uploads data to '214' for sprite decryption
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“Uploads data” is giving it a bit too much credit – I’d say it “sends commands” at best ;)

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Indeed! I think that comment was added when behavior of the MCU was unclear, but now it's well-known.
I simply copied it from saboten set. I'll update it on the next PR

@sergiopolog sergiopolog deleted the macross_prot branch March 18, 2024 23:18
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2 participants