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timers implemented for new z80 mode

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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
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19
Pico/PicoInt.h
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@ -431,6 +431,7 @@ PICO_INTERNAL_ASM void PicoMemResetCDdecode(int r3);
// Pico/Memory.c
PICO_INTERNAL void PicoMemSetupPico(void);
PICO_INTERNAL unsigned int ym2612_read_local_68k(void);
// Pico.c
extern struct Pico Pico;
@ -474,13 +475,23 @@ PICO_INTERNAL void cdda_start_play();
extern short cdda_out_buffer[2*1152];
extern int PsndLen_exc_cnt;
extern int PsndLen_exc_add;
extern int timer_a_next_oflow, timer_a_step; // in z80 cycles
extern int timer_a_next_oflow, timer_a_step, timer_a_offset; // in z80 cycles
extern int timer_b_next_oflow, timer_b_step, timer_b_offset;
void ym2612_sync_timers(int z80_cycles, int mode_old, int mode_new);
#define timers_cycle() \
if (timer_a_next_oflow > 0) timer_a_next_oflow -= Pico.m.pal ? 70938*256 : 59659*256
if (timer_a_next_oflow > 0 && timer_a_next_oflow < 0x70000000) \
timer_a_next_oflow -= Pico.m.pal ? 70938*256 : 59659*256; \
if (timer_b_next_oflow > 0 && timer_b_next_oflow < 0x70000000) \
timer_b_next_oflow -= Pico.m.pal ? 70938*256 : 59659*256; \
ym2612_sync_timers(0, ym2612.OPN.ST.mode, ym2612.OPN.ST.mode);
#define timers_reset() \
timer_a_next_oflow = 0x80000000
timer_a_next_oflow = timer_b_next_oflow = 0x70000000; \
timer_a_step = timer_a_offset = 16495 * 1024; \
timer_b_step = timer_b_offset = 263912 * 256;
// VideoPort.c
PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d);
@ -528,7 +539,7 @@ extern int PsndDacLine;
#define EL_HVCNT 0x00000001 /* hv counter reads */
#define EL_SR 0x00000002 /* SR reads */
#define EL_INTS 0x00000004 /* ints and acks */
#define EL_YM2612R 0x00000008 /* 68k ym2612 reads */
#define EL_YMTIMER 0x00000008 /* ym2612 timer stuff */
#define EL_INTSW 0x00000010 /* log irq switching on/off */
#define EL_ASVDP 0x00000020 /* VDP accesses during active scan */
#define EL_VDPDMA 0x00000040 /* VDP DMA transfers and their timing */