static void calculate_collisions()
{
int X0,Y0;
int X1,Y1;
int CM,HM;
Y0 = pmcram[0];
Y0 = (Y0 << 8) + pmcram[1];
Y0 = (Y0 - 15) / 5;
Y1 = (pmcram[2] - 15) / 5;
if (pmcram[5] < 16)
{
// US Thunder Cross uses this form
X0 = pmcram[5];
X0 = (X0 << 8) + pmcram[6];
X0 = (X0 - 16) / 5;
X1 = (pmcram[7] - 16) / 5;
}
else
{
// Japan Thunder Cross uses this form
X0 = (pmcram[5] - 16) / 5;
X1 = (pmcram[6] - 16) / 5;
}
CM = pmcram[3];
HM = pmcram[4];
run_collisions(X0,Y0,X1,Y1,CM,HM);
}
static void calculate_collisions( running_machine *machine )
{
thunderx_state *state = (thunderx_state *)machine->driver_data;
int X0,Y0;
int X1,Y1;
int CM,HM;
// the data at 0x00 to 0x06 defines the operation
//
// 0x00 : word : last byte of set 0
// 0x02 : byte : last byte of set 1
// 0x03 : byte : collide mask
// 0x04 : byte : hit mask
// 0x05 : byte : first byte of set 0
// 0x06 : byte : first byte of set 1
//
// the USA version is slightly different:
//
// 0x05 : word : first byte of set 0
// 0x07 : byte : first byte of set 1
//
// the operation is to intersect set 0 with set 1
// collide mask specifies objects to ignore
// hit mask is 40 to set bit on object 0 and object 1
// hit mask is 20 to set bit on object 1 only
Y0 = state->pmcram[0];
Y0 = (Y0 << 8) + state->pmcram[1];
Y0 = (Y0 - 15) / 5;
Y1 = (state->pmcram[2] - 15) / 5;
if (state->pmcram[5] < 16)
{
// US Thunder Cross uses this form
X0 = state->pmcram[5];
X0 = (X0 << 8) + state->pmcram[6];
X0 = (X0 - 16) / 5;
X1 = (state->pmcram[7] - 16) / 5;
}
else
{
// Japan Thunder Cross uses this form
X0 = (state->pmcram[5] - 16) / 5;
X1 = (state->pmcram[6] - 16) / 5;
}
CM = state->pmcram[3];
HM = state->pmcram[4];
run_collisions(machine, X0, Y0, X1, Y1, CM, HM);
}
