From 44d61099b0adb5aafcd22bfceed3d74e5ef55c33 Mon Sep 17 00:00:00 2001 From: Phil Bennett Date: Thu, 29 Oct 2009 09:00:52 +0000 Subject: [PATCH] Updated mt_tout CRC/SHA1 and added note about old, likely bad dump [David Haywood] Date: Wed, 28 Oct 2009 13:57:27 +0000 From: David Haywood To: Philip Bennett Subject: Turbo Outrun Megatech After talking with ANY and a few other people I've decided to change the rom being used by the MegaTech version of Turbo Outrun. In all other cases the roms in Megatech carts match the Genesis roms (and have the same Sega part numbers where we know them) In the case of the Turbo Outrun dump, 1 byte differed. This seems highly unlikely, and the Megadrive dump has been verifeid by multiple sources. ANY suspects the mask rom in his cart has developed a fault. I've left documentation of the old dump in the file, just in case another cart comes along which is the same as the one dumped (as long as it isn't the same cart ;-) but chances are it's just a bad rom. --- src/mame/drivers/megatech.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/mame/drivers/megatech.c b/src/mame/drivers/megatech.c index 6b53c1ad613..5f648998773 100644 --- a/src/mame/drivers/megatech.c +++ b/src/mame/drivers/megatech.c @@ -1102,11 +1102,15 @@ ROM_END /* Game 61 - Turbo Outrun */ #define MEGATECH_GAME61(GAME_REGION, INSTRUCTION_REGION) \ ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \ - ROM_LOAD16_WORD_SWAP( "epr-14674.ic1", 0x000000, 0x080000, CRC(c2b9a802) SHA1(108cc844c944125f9d271a2f2db094301294e8c2) ) \ + ROM_LOAD16_WORD_SWAP( "epr-14674.ic1", 0x000000, 0x080000, CRC(453712a2) SHA1(5d2c8430a9a14aac7f19c22617539b0503ab92cd) ) \ MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \ ROM_LOAD( "epr-12368-61.ic2", 0x000000, 0x08000, CRC(4aa0b2a2) SHA1(bce03f88d6cfd02683d51c28058f6229fda13b49) ) \ -ROM_START( mt_tout ) /* Sonic The Hedgehog 2 */ +// original dump of epr-14674.ic1 had CRC(c2b9a802) SHA1(108cc844c944125f9d271a2f2db094301294e8c2) +// with the byte at offset 3 being F6 instead of Fe, this seems like a bad dump when compared to the Genesis rom which +// has been verified on multiple carts, chances are the ROM had developed a fault. + +ROM_START( mt_tout ) /* Turbo Outrun */ MEGATECH_BIOS MEGATECH_GAME61("game0", "inst0") ROM_END