diff options
| author | Ian C <ianc@noddybox.co.uk> | 2021-08-03 20:26:23 +0000 |
|---|---|---|
| committer | Ian C <ianc@noddybox.co.uk> | 2021-08-03 20:26:23 +0000 |
| commit | b7e8b634595445325d10f8fcddcb7d6cdaa8a922 (patch) | |
| tree | 7ecd54e8539cbe1abd37ffda8d3fcd9eb0ddf258 /include | |
| parent | 30c4591b629bb96e9ff99aca24d0e0e51cedbf23 (diff) | |
First attempt at sound
Diffstat (limited to 'include')
| -rw-r--r-- | include/config.h | 1 | ||||
| -rw-r--r-- | include/spec.h | 4 | ||||
| -rw-r--r-- | include/z80.h | 17 | ||||
| -rw-r--r-- | include/z80_private.h | 10 |
4 files changed, 30 insertions, 2 deletions
diff --git a/include/config.h b/include/config.h index b57c3ef..800960b 100644 --- a/include/config.h +++ b/include/config.h @@ -29,6 +29,7 @@ typedef enum { DSSPEC_STICKY_SHIFT, DSSPEC_LOAD_DEFAULT_SNAPSHOT, + DSSPEC_SOUND, DSSPEC_NUM_CONFIG_ITEMS } DSSPEC_ConfigItem; diff --git a/include/spec.h b/include/spec.h index 47549a3..85fb5e7 100644 --- a/include/spec.h +++ b/include/spec.h @@ -32,6 +32,10 @@ #include "z80.h" #include "keyboard.h" +/* Sample rate for sound emulation +*/ +#define SAMPLE_RATE 22050 + /* Initialise the SPEC */ diff --git a/include/z80.h b/include/z80.h index ef24fd0..ab095d8 100644 --- a/include/z80.h +++ b/include/z80.h @@ -134,13 +134,23 @@ typedef int (*Z80Callback)(Z80 *cpu, Z80Val data); */ typedef enum { - eZ80_Instruction, /* data = no cycles since reset */ + eZ80_Instruction, /* data = cycles as returned by Z80Cycles */ eZ80_EDHook, /* data = byte after ED opcode (only for NOP opcodes) */ eZ80_Halt, /* data = 1 halt raised, 0 halt cleared by int */ eZ80_RETI, /* data = ignored */ eZ80_NO_CALLBACK /* leave at end */ } Z80CallbackReason; +/* Defines cycle timers +*/ +typedef enum +{ + Z80_TIMER_1, + Z80_TIMER_2, + Z80_TIMER_3, + Z80_NO_TIMERS +} Z80Timer; + /* Flags in the F register */ @@ -235,6 +245,11 @@ void Z80Exec(Z80 *cpu); Z80Val Z80Cycles(Z80 *cpu); void Z80ResetCycles(Z80 *cpu, Z80Val cycles); +/* Timers that count in cycle counts +*/ +Z80Val Z80GetTimer(Z80 *cpu, Z80Timer timer); +void Z80SetTimer(Z80 *cpu, Z80Timer timer, Z80Val cycles); + /* Set address to label mappings for the disassembler */ diff --git a/include/z80_private.h b/include/z80_private.h index 10cf97e..e0b3381 100644 --- a/include/z80_private.h +++ b/include/z80_private.h @@ -48,6 +48,8 @@ struct Z80Private { Z80Val cycle; + Z80Val timer[Z80_NO_TIMERS]; + int halt; Z80Byte shift; @@ -178,7 +180,13 @@ static inline Z80Word PEEKW(Z80Word addr) #define IS_IX_IY (PRIV->shift==0xdd || PRIV->shift==0xfd) #define OFFSET(off) off=(IS_IX_IY ? (Z80Relative)FETCH_BYTE:0) -#define TSTATE(n) PRIV->cycle+=n +#define TSTATE(n) do \ + { \ + PRIV->cycle+=n; \ + PRIV->timer[Z80_TIMER_1]+=n; \ + PRIV->timer[Z80_TIMER_2]+=n; \ + PRIV->timer[Z80_TIMER_3]+=n; \ + } while(0) #define ADD_R(v) cpu->R=((cpu->R&0x80)|((cpu->R+(v))&0x7f)) #define INC_R ADD_R(1) |