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igs/igs_fear.cpp - add IGS027A dump to fearless [tormod, Peter Wilhelmsen, XingXing] (#12553)

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* correct clock for XA

igs/pgmcrypt.cpp - properly fix fearless decryption

---------

Co-authored-by: DavidHaywood <hazemamewip@hotmail.com>
This commit is contained in:
mamehaze 2024-07-09 13:10:14 +01:00 committed by GitHub
parent df064c59b1
commit d20ef20b4b
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
2 changed files with 4 additions and 5 deletions
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5
src/mame/igs/igs_fear.cpp
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@ -139,7 +139,7 @@ void igs_fear_state::igs_fear(machine_config &config)
ARM7(config, m_maincpu, 50000000/2);
m_maincpu->set_addrmap(AS_PROGRAM, &igs_fear_state::main_map);
MX10EXA(config, m_xa, 10000000); // MX10EXAQC (Philips 80C51 XA) unknown frequency
MX10EXA(config, m_xa, 50000000/3); // MX10EXAQC (Philips 80C51 XA)
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(60);
@ -162,8 +162,7 @@ void igs_fear_state::igs_fear(machine_config &config)
ROM_START( fearless )
ROM_REGION( 0x04000, "maincpu", 0 ) // Internal rom of IGS027A ARM based MCU
// this is taken from superkds, the XOR table required (that is uploaded by this internal ROM) is the same as superkds at least, but actual internal ROM might not be identical
ROM_LOAD( "fearless_igs027a.bin", 0x00000, 0x4000, BAD_DUMP CRC(9a8e790d) SHA1(ab020a04a4ed0c0e5ec8c979f206fe57572d2304) ) // sticker marked 'F1'
ROM_LOAD( "fearless_igs027a.bin", 0x00000, 0x4000, CRC(2121f01b) SHA1(de44016b590fdcf6bfb63e3f8dbbbd679938fe87) ) // sticker marked 'F1'
ROM_REGION32_LE( 0x80000, "user1", 0 ) // external ARM data / prg
ROM_LOAD( "fearlessp_v-101us.u37", 0x000000, 0x80000, CRC(2522873c) SHA1(8db709877311b6d2796353fc9a44a820937e35c2) )

4
src/mame/igs/pgmcrypt.cpp
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@ -1453,8 +1453,8 @@ void fearless_decrypt(running_machine &machine)
uint16_t x = src[i];
IGS27_CRYPT1
IGS27_CRYPT2_ALT
IGS27_CRYPT3
// IGS27_CRYPT2
IGS27_CRYPT3_ALT2
IGS27_CRYPT4
// IGS27_CRYPT5
IGS27_CRYPT6