65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
#ifndef SPENCER_H
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#define SPENCER_H
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#include <stdint.h>
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#include <stdlib.h>
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// mmr flags
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#define S_R 1 // read
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#define S_W 0 // write
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#define S_I 2 // internal (for internal emulator function)
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typedef struct {
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uint8_t A, X, Y, SP, P; // 1 byte registers
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uint16_t PC; // 2 byte registers
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uint8_t* mem; // 0x10000 bytes
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/* MMR arguments:
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*
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* width description
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* -------------------------
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* u8 | register number (0-15)
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* u8 | data to write (if reading anything is fine)
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* u8 | S_R to read, S_W to write
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*/
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uint8_t(*mmr)(uint8_t, uint8_t, uint8_t);
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unsigned int wait;
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unsigned int initialized;
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uint8_t sleeping;
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} spc_cpu;
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#define spc_getn(CPU) (CPU->P >> 7)
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#define spc_getv(CPU) ((CPU->P >> 6) & 1)
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#define spc_getp(CPU) ((CPU->P >> 5) & 1)
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#define spc_getb(CPU) ((CPU->P >> 4) & 1)
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#define spc_geth(CPU) ((CPU->P >> 3) & 1)
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#define spc_geti(CPU) ((CPU->P >> 2) & 1)
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#define spc_getz(CPU) ((CPU->P >> 1) & 1)
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#define spc_getc(CPU) (CPU->P & 1)
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#define spc_setn(CPU) CPU->P |= 0x80
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#define spc_setv(CPU) CPU->P |= 0x40
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#define spc_setp(CPU) CPU->P |= 0x20
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#define spc_setb(CPU) CPU->P |= 0x10
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#define spc_seth(CPU) CPU->P |= 0x08
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#define spc_seti(CPU) CPU->P |= 0x04
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#define spc_setz(CPU) CPU->P |= 0x02
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#define spc_setc(CPU) CPU->P |= 0x01
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#define spc_unsetn(CPU) CPU->P &= ~0x80
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#define spc_unsetv(CPU) CPU->P &= ~0x40
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#define spc_unsetp(CPU) CPU->P &= ~0x20
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#define spc_unsetb(CPU) CPU->P &= ~0x10
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#define spc_unseth(CPU) CPU->P &= ~0x08
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#define spc_unseti(CPU) CPU->P &= ~0x04
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#define spc_unsetz(CPU) CPU->P &= ~0x02
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#define spc_unsetc(CPU) CPU->P &= ~0x01
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#define spc_sbn(c, d) c->P = (c->P & 0x7F) | (d & 0x80)
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#define spc_sbz(c, d) c->P = (c->P & 0xFD) | (!d << 1)
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#define spc_inc(c, d) d++; spc_sbn(c, d); spc_sbz(c, d)
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#define spc_trans(c, a, b) a = b; spc_sbn(c, a); spc_sbz(c, a)
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#endif
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