From 4832f653ea9e4ae5207da4475f2bcece37873b1f Mon Sep 17 00:00:00 2001 From: cam900 Date: Sat, 18 Jan 2025 03:14:44 +0900 Subject: dataeast/deco156_m.cpp: Updated comments and cleaned up code a little. (#13240) * Updated source file names and system names in comments. * Reduced variable scope, made some variables const, fixed tabulation. --- src/mame/dataeast/deco156_m.cpp | 70 ++++++++++++++++++++--------------------- 1 file changed, 35 insertions(+), 35 deletions(-) diff --git a/src/mame/dataeast/deco156_m.cpp b/src/mame/dataeast/deco156_m.cpp index d1dae4948cb..5de666c9ee3 100644 --- a/src/mame/dataeast/deco156_m.cpp +++ b/src/mame/dataeast/deco156_m.cpp @@ -6,29 +6,33 @@ The 156 Chip is used on the following games: - deco_mlc.c + dataeast/deco_mlc.cpp - Stadium Hero 96 (stadhr96, stadh96a) - Skull Fang (skullfng) - Dunk Dream '95 / Hoops '96 (ddream95, hoops96) + Stadium Hero 96 (stadhr96*) + Skull Fang (skullfng*) + Dunk Dream '95 / Hoops / Hoops '96 (ddream95, hoops95, hoops96) + Janken Game Acchi Muite Hoi! (acchi) - deco32.c + dataeast/deco32.cpp - Night Slashers (nslasher, nslashej) + Night Slashers (nslasher*) - simpl156 + dataeast/simpl156.cpp Charlie Ninja (charlien) - Magical Drop / Magical Drop Plus / Chain Reaction (magdrop, magdropp, chainrec) - Joe & Mac Returns (joemacr, joemacra) + Magical Drop / Magical Drop Plus 1 / Chain Reaction (magdrop, magdropp, chainrec) + Joe & Mac Returns (joemacr*) Party Time / Ganbare! Gonta!! 2 (prtytime, gangonta) + Osman / Cannon Dancer (osman, candance) - deco156.c + dataeast/deco156.cpp - Osman (osman) - Heavy Smash (hvysmsh) - World Cup Volly '95 (wcvol95) - Backfire!! (backfire, backfira) + Heavy Smash (hvysmsh*) + World Cup Volley '95 (wcvol95*) + + dataeast/backfire.cpp + + Backfire! (backfire*) */ @@ -38,13 +42,9 @@ static void decrypt(uint32_t *src, uint32_t *dst, int length) { - int a; - - for (a = 0; a < length/4; a++) + for (int a = 0; a < length / 4; a++) { - int addr, dword; - - addr = (a & 0xff0000) | 0x92c6; + int addr = (a & 0xff0000) | 0x92c6; if (a & 0x0001) addr ^= 0xce4a; if (a & 0x0002) addr ^= 0x4db2; @@ -63,7 +63,7 @@ static void decrypt(uint32_t *src, uint32_t *dst, int length) if (a & 0x4000) addr ^= 0x1eef; if (a & 0x8000) addr ^= 0xf5a5; - dword = src[addr]; + uint32_t dword = src[addr]; // note that each of the following lines affects exactly two bits @@ -87,35 +87,35 @@ static void decrypt(uint32_t *src, uint32_t *dst, int length) switch (a & 3) { case 0: - dword = bitswap<32>( dword ^ 0xec63197a, - 1, 4, 7, 28, 22, 18, 20, 9, + dword = bitswap<32>(dword ^ 0xec63197a, + 1, 4, 7, 28, 22, 18, 20, 9, 16, 10, 30, 2, 31, 24, 19, 29, - 6, 21, 23, 11, 12, 13, 5, 0, - 8, 26, 27, 15, 14, 17, 25, 3 ); + 6, 21, 23, 11, 12, 13, 5, 0, + 8, 26, 27, 15, 14, 17, 25, 3); break; case 1: - dword = bitswap<32>( dword ^ 0x58a5a55f, + dword = bitswap<32>(dword ^ 0x58a5a55f, 14, 23, 28, 29, 6, 24, 10, 1, - 5, 16, 7, 2, 30, 8, 18, 3, + 5, 16, 7, 2, 30, 8, 18, 3, 31, 22, 25, 20, 17, 0, 19, 27, - 9, 12, 21, 15, 26, 13, 4, 11 ); + 9, 12, 21, 15, 26, 13, 4, 11); break; case 2: - dword = bitswap<32>( dword ^ 0xe3a65f16, + dword = bitswap<32>(dword ^ 0xe3a65f16, 19, 30, 21, 4, 2, 18, 15, 1, 12, 25, 8, 0, 24, 20, 17, 23, 22, 26, 28, 16, 9, 27, 6, 11, - 31, 10, 3, 13, 14, 7, 29, 5 ); + 31, 10, 3, 13, 14, 7, 29, 5); break; case 3: - dword = bitswap<32>( dword ^ 0x28d93783, + dword = bitswap<32>(dword ^ 0x28d93783, 30, 6, 15, 0, 31, 18, 26, 22, 14, 23, 19, 17, 10, 8, 11, 20, - 1, 28, 2, 4, 9, 24, 25, 27, - 7, 21, 13, 29, 5, 3, 16, 12 ); + 1, 28, 2, 4, 9, 24, 25, 27, + 7, 21, 13, 29, 5, 3, 16, 12); break; } @@ -127,8 +127,8 @@ static void decrypt(uint32_t *src, uint32_t *dst, int length) void deco156_decrypt(running_machine &machine) { uint32_t *rom = (uint32_t *)machine.root_device().memregion("maincpu")->base(); - int length = machine.root_device().memregion("maincpu")->bytes(); - std::vector buf(length/4); + int const length = machine.root_device().memregion("maincpu")->bytes(); + std::vector buf(length / 4); memcpy(&buf[0], rom, length); decrypt(&buf[0], rom, length); -- cgit v1.2.3