mirror of
https://github.com/Marat-Tanalin/bsnes-mt.git
synced 2025-04-02 10:21:42 -04:00
136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
#include <sfc/sfc.hpp>
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namespace SuperFamicom {
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#define DSP2_CPP
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#include "opcodes.cpp"
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DSP2 dsp2;
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#include "serialization.cpp"
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auto DSP2::power() -> void {
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status.waiting_for_command = true;
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status.in_count = 0;
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status.in_index = 0;
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status.out_count = 0;
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status.out_index = 0;
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status.op05transparent = 0;
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status.op05haslen = false;
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status.op05len = 0;
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status.op06haslen = false;
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status.op06len = 0;
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status.op09word1 = 0;
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status.op09word2 = 0;
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status.op0dhaslen = false;
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status.op0doutlen = 0;
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status.op0dinlen = 0;
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}
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auto DSP2::read(uint addr, uint8 data) -> uint8 {
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if(addr & 1) return 0x00;
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uint8 r = 0xff;
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if(status.out_count) {
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r = status.output[status.out_index++];
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status.out_index &= 511;
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if(status.out_count == status.out_index) {
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status.out_count = 0;
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}
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}
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return r;
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}
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auto DSP2::write(uint addr, uint8 data) -> void {
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if(addr & 1) return;
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if(status.waiting_for_command) {
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status.command = data;
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status.in_index = 0;
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status.waiting_for_command = false;
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switch(data) {
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case 0x01: status.in_count = 32; break;
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case 0x03: status.in_count = 1; break;
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case 0x05: status.in_count = 1; break;
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case 0x06: status.in_count = 1; break;
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case 0x07: break;
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case 0x08: break;
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case 0x09: status.in_count = 4; break;
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case 0x0d: status.in_count = 2; break;
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case 0x0f: status.in_count = 0; break;
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}
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} else {
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status.parameters[status.in_index++] = data;
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status.in_index &= 511;
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}
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if(status.in_count == status.in_index) {
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status.waiting_for_command = true;
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status.out_index = 0;
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switch(status.command) {
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case 0x01: {
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status.out_count = 32;
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op01();
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} break;
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case 0x03: {
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op03();
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} break;
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case 0x05: {
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if(status.op05haslen) {
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status.op05haslen = false;
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status.out_count = status.op05len;
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op05();
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} else {
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status.op05len = status.parameters[0];
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status.in_index = 0;
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status.in_count = status.op05len * 2;
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status.op05haslen = true;
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if(data)status.waiting_for_command = false;
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}
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} break;
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case 0x06: {
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if(status.op06haslen) {
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status.op06haslen = false;
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status.out_count = status.op06len;
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op06();
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} else {
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status.op06len = status.parameters[0];
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status.in_index = 0;
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status.in_count = status.op06len;
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status.op06haslen = true;
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if(data)status.waiting_for_command = false;
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}
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} break;
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case 0x07: break;
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case 0x08: break;
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case 0x09: {
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op09();
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} break;
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case 0x0d: {
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if(status.op0dhaslen) {
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status.op0dhaslen = false;
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status.out_count = status.op0doutlen;
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op0d();
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} else {
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status.op0dinlen = status.parameters[0];
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status.op0doutlen = status.parameters[1];
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status.in_index = 0;
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status.in_count = (status.op0dinlen + 1) >> 1;
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status.op0dhaslen = true;
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if(data)status.waiting_for_command = false;
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}
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} break;
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case 0x0f: break;
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}
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}
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}
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}
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