103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
//DingusPPC - Prototype 5bf2
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//Written by divingkatae
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//(c)2018-20 (theweirdo)
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//Please ask for permission
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//if you want to distribute this.
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//(divingkatae#1017 on Discord)
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//Functionality for the Serial Ports
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// Based on the Zilog Z8530 SCC chip
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#include <iostream>
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#include <cinttypes>
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#include "macioserial.h"
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#include "ppcemumain.h"
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uint32_t mac_serial_address;
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uint8_t serial_write_byte;
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uint8_t serial_read_byte;
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bool w7_prime;
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void mac_serial_init(){
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machine_iocontrolmem_mem[0x3013004] = 0x04;
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machine_iocontrolmem_mem[0x3013009] = 0xC0;
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machine_iocontrolmem_mem[0x301300B] = 0x08;
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machine_iocontrolmem_mem[0x301300E] = 0x30;
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machine_iocontrolmem_mem[0x301300F] = 0xF8;
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machine_iocontrolmem_mem[0x3013010] = 0x44;
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machine_iocontrolmem_mem[0x3013011] = 0x06;
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}
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void mac_serial_read(){
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if (mac_serial_address >=0x3013020){
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mac_serial_address -= 0x20;
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}
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if (w7_prime){
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if (((machine_iocontrolmem_mem[0x301301F] >> 2) & 0x1) & ((machine_iocontrolmem_mem[0x3013007] >> 6) & 0x1)){
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switch(mac_serial_address){
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case 0x14: case 0x15:
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serial_read_byte = machine_iocontrolmem_mem[(mac_serial_address - 0x10)];
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break;
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case 0x19:
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serial_read_byte = machine_iocontrolmem_mem[0x3];
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break;
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case 0x1B:
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serial_read_byte = machine_iocontrolmem_mem[0x10];
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break;
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case 0x1E:
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serial_read_byte = machine_iocontrolmem_mem[0x07];
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break;
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default:
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serial_read_byte = machine_iocontrolmem_mem[mac_serial_address];
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break;
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}
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}
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}
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else{
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if ((machine_iocontrolmem_mem[0x301300F] >> 2) & 0x1){
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switch(mac_serial_address){
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case 0x14: case 0x15:
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serial_read_byte = machine_iocontrolmem_mem[(mac_serial_address - 4)];
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break;
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case 0x19: case 0x1B:
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serial_read_byte = machine_iocontrolmem_mem[(mac_serial_address + 4)];
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break;
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default:
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serial_read_byte = machine_iocontrolmem_mem[mac_serial_address];
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break;
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}
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}
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else {
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switch(mac_serial_address){
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case 0x14: case 0x15: case 0x16: case 0x17:
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serial_read_byte = machine_iocontrolmem_mem[(mac_serial_address - 4)];
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case 0x19: case 0x1B:
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serial_read_byte = machine_iocontrolmem_mem[(mac_serial_address + 4)];
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break;
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default:
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serial_read_byte = machine_iocontrolmem_mem[mac_serial_address];
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break;
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}
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}
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}
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}
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void mac_serial_write(){
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if (mac_serial_address >=0x3013020){
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mac_serial_address -= 0x20;
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}
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machine_iocontrolmem_mem[mac_serial_address] = serial_write_byte;
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if ((machine_iocontrolmem_mem[0x0F]) & 0x1){
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w7_prime = true;
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}
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else{
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w7_prime = false;
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}
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machine_iocontrolmem_mem[(mac_serial_address + 0x10)] = machine_iocontrolmem_mem[mac_serial_address];
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}
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