89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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PlutoISA
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Copyright (C) 2024 Patrick_Pluto
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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <iostream>
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#include <fstream>
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#include <cstdlib>
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#include <cstdint>
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#include <chrono>
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#include <thread>
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#include "tpu.hpp"
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using namespace std;
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uint8_t *registers = ( uint8_t * ) malloc ( 8 * sizeof ( uint8_t ) );
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uint8_t *memory = ( uint8_t * ) malloc ( 128 * sizeof ( uint8_t ) );
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uint8_t *pointer = ( uint8_t * ) malloc ( sizeof ( uint8_t ) );
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void cpuInstructions ( uint8_t *rom ) {
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cout << static_cast<int> ( rom[*pointer] ) << endl;
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cout << static_cast<int> ( *pointer ) << endl;
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switch ( rom[*pointer] ) {
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case 0x00: // GET
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registers[rom[*pointer + 1]] = rom[*pointer + 2];
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*pointer += 3;
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break;
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case 0x01: // LOAD
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registers[rom[*pointer + 1]] = memory[rom[*pointer + 2]];
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*pointer += 3;
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break;
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case 0x02: // STORE
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memory[rom[*pointer + 2]] = registers[rom[*pointer + 1]];
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*pointer += 3;
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break;
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case 0x03: // ADD
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registers[rom[*pointer + 1]] = registers[rom[*pointer + 2]] + registers[rom[*pointer + 3]];
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*pointer += 4;
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break;
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case 0x04: // SUB
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registers[rom[*pointer + 1]] = registers[rom[*pointer + 2]] - registers[rom[*pointer + 3]];
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*pointer += 4;
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break;
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case 0x05: // JMP
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*pointer = rom[*pointer + 1];
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break;
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case 0x06: // JEQ
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if ( rom[*pointer + 2] == registers[rom[*pointer + 3]] ) {
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*pointer = rom[*pointer + 1];
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}
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break;
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case 0x07: // HIN
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cin >> registers[rom[*pointer + 1]];
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*pointer += 2;
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break;
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default:
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cout << "Invalid Instruction, quitting." << endl;
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exit ( 1 );
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}
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}
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void cpuEmulation ( uint8_t *rom ) {
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const int targetFPS = 20;
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const int frameDuration = 1000 / targetFPS;
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*pointer = 0;
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while ( true ) {
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auto start = chrono::high_resolution_clock::now();
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cpuInstructions ( rom );
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textProcessing ( registers[7] );
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auto end = chrono::high_resolution_clock::now();
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chrono::duration<double, milli> elapsed = end - start;
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if ( elapsed.count() < frameDuration ) {
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this_thread::sleep_for ( chrono::milliseconds ( frameDuration ) - elapsed );
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}
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}
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}
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