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Ported 0x42c2 to raiden2.c, helps with ship entry, respawn and power-up movements

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Angelo Salese 2012-09-18 01:46:35 +00:00
parent 91e80bfc39
commit 059d606707
1 changed files with 23 additions and 5 deletions
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28
src/mame/drivers/raiden2.c
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@ -532,7 +532,7 @@ WRITE16_MEMBER(raiden2_state::cop_cmd_w)
case 0x3b30:
case 0x3bb0: { // 3bb0 0004 007f 0038 - 0f9c 0b9c 0b9c 0b9c 0b9c 0b9c 0b9c 099c
/* TODO: these are actually internally loaded */
/* TODO: these are actually internally loaded via 0x130e command */
int dx = space.read_dword(cop_regs[1]+4) - space.read_dword(cop_regs[0]+4);
int dy = space.read_dword(cop_regs[1]+8) - space.read_dword(cop_regs[0]+8);
@ -546,16 +546,34 @@ WRITE16_MEMBER(raiden2_state::cop_cmd_w)
}
case 0x42c2: { // 42c2 0005 fcdd 0040 - 0f9a 0b9a 0b9c 0b9c 0b9c 029c 0000 0000
int div = space.read_word(cop_regs[0]+0x36);
/* TODO: these are actually internally loaded via 0x130e command */
int dx = space.read_dword(cop_regs[1]+4) - space.read_dword(cop_regs[0]+4);
int dy = space.read_dword(cop_regs[1]+8) - space.read_dword(cop_regs[0]+8);
int div = space.read_word(cop_regs[0]+(0x36));
int res;
int cop_dist_raw;
if(!div)
{
printf("divide by zero?\n");
div = 1;
}
res = space.read_word(cop_regs[0]+(0x38)) / div;
res <<= cop_scale + 2; /* TODO: check this */
space.write_word(cop_regs[0]+0x38, res);
/* TODO: calculation of this one should occur at 0x3b30/0x3bb0 I *think* */
/* TODO: recheck if cop_scale still masks at 3 with this command */
dx >>= 11 + cop_scale;
dy >>= 11 + cop_scale;
cop_dist_raw = sqrt((double)(dx*dx+dy*dy));
res = cop_dist_raw;
res /= div;
cop_dist = (1 << (5 - cop_scale)) / div;
/* TODO: bits 5-6-15 */
cop_status = 7;
space.write_word(cop_regs[0]+(0x38), res);
break;
}