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pt3: update z80 checker

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This commit is contained in:
Vince Weaver 2019-10-16 22:07:01 -04:00
parent 2d073f2570
commit a3ed388387
1 changed files with 59 additions and 3 deletions
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62
pt3_player/table_gen/z80_volume.c
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@ -44,6 +44,7 @@ static unsigned char PT3VolumeTable_35[]={
static unsigned char VT[256];
#if 0
//VolTableCreator (c) Ivan Roshin
//A - VersionForVolumeTable (0..4 - 3.xx..3.4x;
//5.. - 3.5x..3.6x..VTII1.0)
@ -151,12 +152,68 @@ m3:
if (a!=0) goto pt3_initv2; // jr nz,pt3_initv2
}
#endif
/* PT3VolumeTable_35 = 1 */
/* PT3VolumeTable_33334 = 0 */
void pt3_setup_volume_table(int which) {
//based on VolTableCreator by Ivan Roshin
// originally in z80 assembly language
//A - VersionForVolumeTable (0..4 - 3.xx..3.4x;
//5.. - 3.5x..3.6x..VTII1.0)
unsigned int carry,a,hl,de,temp1,temp2,c,ix;
/* 0x00 or 0x10 */
de=(which<<4);
for(ix=1;ix<16;ix++) {
/* 0x10 or 0x11 */
hl=(0x11-which);
hl=hl+de;
carry=(hl>>16);
hl&=0xffff;
/* swap hl and de */
temp1=hl;
temp2=de;
hl=temp2;
de=temp1;
/* 0 or 0xffff */
hl=(0-carry)&0xffff;
for(c=0;c<16;c++) {
if (!which) {
carry=!!(hl&0x80);
}
a=(hl>>8)&0xff;
a=a+carry;
VT[ix*16+c]=a;
hl=hl+de;
}
if ((de&0xff)==0x77) {
de++;
}
}
}
int main(int argc, char **argv) {
int i;
VolTableCreator(0);
pt3_setup_volume_table(0);
for(i=0;i<256;i++) {
if (i%16==0) printf("\n");
@ -180,8 +237,7 @@ int main(int argc, char **argv) {
VolTableCreator(1);
pt3_setup_volume_table(1);
for(i=0;i<256;i++) {
if (i%16==0) printf("\n");