Emulator: Pc Psp

typedef struct uint32_t r[32]; // general purpose regs uint32_t pc; uint32_t hi, lo; // multiply/divide float fpr[32]; // FPU regs uint32_t fcr31; // FPU control // VFPU (vector) – 128 registers float vfpu[128][4]; psp_cpu_t; void cpu_step(psp_cpu_t *cpu) uint32_t instr = mem_read32(cpu->pc); cpu->pc += 4; switch((instr >> 26) & 0x3F) // primary opcode case 0x00: // SPECIAL decode_special(cpu, instr); break; case 0x11: // COP1 (FPU) decode_cop1(cpu, instr); break; case 0x12: // COP2 (VFPU) decode_cop2(cpu, instr); break; // ... other MIPS opcodes

void mix_audio(int16_t *out, int samples) memset(out, 0, samples * 2 * sizeof(int16_t)); for(int ch = 0; ch < 2; ch++) psp_audio_channel *c = &channels[ch]; if(!c->enabled) continue; for(int i = 0; i < samples; i++) int sample = c->read_sample(c); // resample from source buffer out[i*2 + ch] += sample * c->volume / 0x8000; pc psp emulator

Implement common modules: