mirror of https://github.com/bsnes-emu/bsnes.git
106 lines
1.6 KiB
C++
106 lines
1.6 KiB
C++
#include <sfc/sfc.hpp>
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namespace SuperFamicom {
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#include "nec.cpp"
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#include "sony.cpp"
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SuperDisc::SuperDisc() {
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create(&SuperDisc::Enter, 75);
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bus.map({&SuperDisc::read, this}, {&SuperDisc::write, this}, "00-3f,80-bf:21e0-21e5");
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r.irqEnable = 0x00;
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nec.command.reset();
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nec.data = 0x00;
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sony.command = 0x00;
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sony.data = 0x00;
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}
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SuperDisc::~SuperDisc() {
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bus.unmap("00-3f,80-bf:21e0-21e5");
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}
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auto SuperDisc::Enter() -> void {
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while(true) scheduler.synchronize(), peripherals.expansionPort->main();
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}
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auto SuperDisc::main() -> void {
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cpu.r.irq = 0;
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if(r.irqEnable.bit(3)) {
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cpu.r.irq = 1;
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nec.data = necPollIRQ();
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}
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if(r.irqEnable.bit(2)) {
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cpu.r.irq = 1;
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sony.data = sonyPollIRQ();
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}
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step(1);
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synchronizeCPU();
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}
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auto SuperDisc::read(uint24 addr, uint8 data) -> uint8 {
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addr = 0x21e0 | (addr & 7);
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if(addr == 0x21e0) {
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data = 0x00;
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}
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if(addr == 0x21e1) {
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cpu.r.irq = 0;
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data = necReadData();
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}
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if(addr == 0x21e2) {
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data = 0x00;
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}
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if(addr == 0x21e3) {
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cpu.r.irq = 0;
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data = sonyReadData();
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}
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if(addr == 0x21e4) {
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data = r.irqEnable;
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}
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if(addr == 0x21e5) {
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data = 0x00;
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}
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return data;
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}
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auto SuperDisc::write(uint24 addr, uint8 data) -> void {
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addr = 0x21e0 | (addr & 7);
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if(addr == 0x21e0) {
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}
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if(addr == 0x21e1) {
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necWriteCommand(data.bits(0,3));
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}
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if(addr == 0x21e2) {
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sonyWriteCommand(data);
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}
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if(addr == 0x21e3) {
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sonyWriteData(data);
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}
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if(addr == 0x21e4) {
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r.irqEnable = data;
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}
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if(addr == 0x21e5) {
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}
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}
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}
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