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Experimental (wrong) code, will hopefully improve it tomorrow ...

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This commit is contained in:
Angelo Salese 2011-01-09 16:07:42 +00:00
parent 9467243216
commit cbb1853147
1 changed files with 33 additions and 18 deletions
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51
src/mame/machine/seicop.c
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@ -1722,7 +1722,7 @@ static UINT16 cop_status,cop_dist,cop_angle;
static UINT16 cop_hit_status;
static UINT32 cop_hit_val_x,cop_hit_val_y;
static UINT32 cop_sort_lookup,cop_sort_ram_addr,cop_sort_param;
static INT8 cop_angle_compare;
static UINT8 cop_angle_compare;
static UINT8 cop_angle_mod_val;
static struct
{
@ -2373,31 +2373,46 @@ static WRITE16_HANDLER( generic_cop_w )
//(grainbow) | 8 | f3e7 | 6200 | 380 39a 380 a80 29a
/* search direction, used on SD Gundam homing weapon */
/* FIXME: It mustn't change direction */
/* FIXME: the "modifier" is actually a bit-wise register! */
if(COP_CMD(0x380,0x39a,0x380,0xa80,0x29a,0x000,0x000,0x000,8,0xf3e7))
{
static INT8 cur_angle;
cur_angle = space->read_word(cop_register[0]+(0x34^2)) & 0xff;
static UINT8 cur_angle;
int comp1,comp2;
cur_angle = (space->read_word(cop_register[0]+(0x34^2)) & 0xff);
comp1 = (cur_angle - cop_angle_compare) & 0xff;
comp2 = (cop_angle_compare - cur_angle) & 0xff;
//popmessage("(%02x %02x) %02x",cur_angle,cop_angle_compare,cop_angle_mod_val);
if(cur_angle < cop_angle_compare)
//printf("%02x %02x %d %d",cur_angle,cop_angle_compare,comp1,comp2);
if(comp1 < comp2)
{
//if((cop_angle_compare - cur_angle) < cop_angle_mod_val)
// cur_angle += (cop_angle_compare - cur_angle);
//else
cur_angle += cop_angle_mod_val;
if(comp1 < cop_angle_mod_val)
cur_angle = cop_angle_compare;
else
cur_angle -= (cop_angle_mod_val + 1);
//printf(" < %02x %02x\n",cur_angle,cop_angle_compare);
}
else if(comp1 > comp2)
{
if(comp2 < cop_angle_mod_val)
cur_angle = cop_angle_compare;
else
cur_angle += (cop_angle_mod_val + 1);
//printf(" > %02x %02x\n",cur_angle,cop_angle_compare);
}
else if(cur_angle != cop_angle_compare)
{
cur_angle += (cop_angle_mod_val + 1); // TODO: what happens if the two values are equal (like 0xff - 0x7f / 0x7f - 0xff)?
//printf(" == %02x %02x\n",cur_angle,cop_angle_compare);
}
if(cur_angle > cop_angle_compare)
{
//if((cur_angle - cop_angle_compare) < cop_angle_mod_val)
// cur_angle -= (cop_angle_compare - cur_angle);
//else
cur_angle -= cop_angle_mod_val;
}
space->write_word(cop_register[0]+(0x34^2),cur_angle);
space->write_word(cop_register[0]+(0x34^2),cur_angle & 0xff);
return;
}