RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

timers implemented for new z80 mode

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@460 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-05-26 18:58:21 +00:00
parent 4b9c588826
commit 43e6eaad0b
12 changed files with 128 additions and 81 deletions
Download patch file Download diff file Expand all files Collapse all files

21
Pico/sound/ym2612.h
View file

@ -141,35 +141,16 @@ typedef struct
} YM2612;
#endif
extern FM_ST *ym2612_st;
#ifndef EXTERNAL_YM2612
extern YM2612 ym2612;
#endif
#define YM2612Read() ym2612_st->status
#define YM2612PicoTick(n) \
{ \
/* timer A */ \
if(ym2612_st->mode & 0x01 && (ym2612_st->TAT+=64*n) >= ym2612_st->TAC) { \
ym2612_st->TAT -= ym2612_st->TAC; \
if(ym2612_st->mode & 0x04) ym2612_st->status |= 1; \
} \
\
/* timer B */ \
if(ym2612_st->mode & 0x02 && (ym2612_st->TBT+=64*n) >= ym2612_st->TBC) { \
ym2612_st->TBT -= ym2612_st->TBC; \
if(ym2612_st->mode & 0x08) ym2612_st->status |= 2; \
} \
}
void YM2612Init_(int baseclock, int rate);
void YM2612ResetChip_(void);
int YM2612UpdateOne_(int *buffer, int length, int stereo, int is_buf_empty);
int YM2612Write_(unsigned int a, unsigned int v);
unsigned char YM2612Read_(void);
//unsigned char YM2612Read_(void);
int YM2612PicoTick_(int n);
void YM2612PicoStateLoad_(void);