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(nw) warofbugg : notes

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This commit is contained in:
Robbbert 2019-03-22 19:36:32 +11:00
parent 809f16a672
commit 464750e988
1 changed files with 15 additions and 8 deletions
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23
src/mame/drivers/galaxian.cpp
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@ -7035,6 +7035,12 @@ void galaxian_state::init_nolock()
space.unmap_write(0x6002, 0x6002, 0x7f8);
}
// The first rom loads at 0800, then 1800, 2800?, 3800 and 4800.
// Unfortunately the 3rd rom appears to be total garbage.
// Each block of 256 bytes is in reverse order. Some code
// is missing: 00xx, 4Axx, 10xx, 11xx at least. The game
// uses 0200-05FF as RAM. It also accesses 6000, 6800, 700x, 7800.
// Perhaps the missing code was stored in battery-backed RAM?
void galaxian_state::init_warofbugg()
{
uint8_t* romdata = memregion("maincpu")->base();
@ -7042,9 +7048,10 @@ void galaxian_state::init_warofbugg()
uint8_t buf[0x4000];
memcpy(buf, romdata, 0x4000);
// the rom data is at the very least, backwards, but there still seems to be missing code
for (int i = 0; i < 0x4000; i++)
romdata[i] = buf[i^0x7ff];
// unscramble each block
for (int i = 0; i < 0x40; i++)
for (int j = 0; j < 0x100; j++)
romdata[i*256+j] = buf[i*256+(j^0xff)];
init_nolock();
@ -8460,11 +8467,11 @@ ROM_END
ROM_START( warofbugg )
ROM_REGION( 0x4000, "maincpu", 0 )
ROM_LOAD( "wotbg-u-1.bin", 0x0000, 0x0800, CRC(f43ff0a8) SHA1(b87abeb8af9105fa8fba78f9a68363bd89066e7f) )
ROM_LOAD( "wotbg-v-2.bin", 0x0800, 0x0800, CRC(eb7a028b) SHA1(8c822ae11d3cc04f749a7cd639d15b9fc830ab35) )
ROM_LOAD( "wotbg-w-3.bin", 0x1000, 0x0800, CRC(693e0e50) SHA1(00b19969cee0f95bfb8251c2df133ff2c9ae3b00) )
ROM_LOAD( "wotbg-y-4.bin", 0x1800, 0x0800, CRC(885d4982) SHA1(4aeaf514a9413a9cb9a971fd258c6cf46ca66fc4) )
ROM_LOAD( "wotbg-z-5.bin", 0x2000, 0x0800, CRC(60041ef2) SHA1(cced5837a037ac5cd8fa6260d69d8e33de5ecd48) )
ROM_LOAD( "wotbg-u-1.bin", 0x0000, 0x0800, CRC(f43ff0a8) SHA1(b87abeb8af9105fa8fba78f9a68363bd89066e7f) ) // -> 0800
ROM_LOAD( "wotbg-v-2.bin", 0x0800, 0x0800, CRC(eb7a028b) SHA1(8c822ae11d3cc04f749a7cd639d15b9fc830ab35) ) // -> 1800
ROM_LOAD( "wotbg-w-3.bin", 0x1000, 0x0800, CRC(693e0e50) SHA1(00b19969cee0f95bfb8251c2df133ff2c9ae3b00) ) // -> ???? garbage
ROM_LOAD( "wotbg-y-4.bin", 0x1800, 0x0800, CRC(885d4982) SHA1(4aeaf514a9413a9cb9a971fd258c6cf46ca66fc4) ) // -> 3800
ROM_LOAD( "wotbg-z-5.bin", 0x2000, 0x0800, CRC(60041ef2) SHA1(cced5837a037ac5cd8fa6260d69d8e33de5ecd48) ) // -> 4800
ROM_REGION( 0x1000, "gfx1", 0 )
ROM_LOAD( "warofbug.1k", 0x0000, 0x0800, CRC(8100fa85) SHA1(06641c431cace36dec98b87555f62e72f3e53a31) )