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122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
//
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// main.c
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// 6502
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//
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// Created by Tamas Rudnai on 7/14/19.
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// Copyright © 2019, 2020 Tamas Rudnai. All rights reserved.
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//
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// This file is part of Steve ][ -- The Apple ][ Emulator.
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//
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// Steve ][ is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Steve ][ is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Steve ][. If not, see <https://www.gnu.org/licenses/>.
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//
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// Documentations:
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//
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// http://nesdev.com/6502_cpu.txt
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// http://www.oxyron.de/html/opcodes02.html
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// https://macgui.com/kb/article/46
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// https://www.masswerk.at/6502/6502_instruction_set.html
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//
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#define CLK_WAIT
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#define DEBUGGER
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#define FETCH_ADDR disass_addr
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <time.h>
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#include "6502.h"
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#include "speaker.h"
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#include "../util/common.h"
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#define SOFTRESET_VECTOR 0x3F2
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#define NMI_VECTOR 0xFFFA
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#define RESET_VECTOR 0xFFFC
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#define IRQ_VECTOR 0xFFFE
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extern m6502_t m6502;
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uint16_t disass_addr = 0xFDED;
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#include "../util/disassembler.h"
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#include "../dev/mem/mmio.h"
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typedef struct {
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uint8_t L;
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uint8_t H;
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} bytes_t;
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/**
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Instruction Implementations
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!!!! `his has to be here!!!
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This idea is that "INLINE" would work only if it is
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located in the same source file -- hence the include...
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**/
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#include "6502_debugger.h"
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#include "6502_instructions.h"
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#include "6502_bp.h"
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INLINE int m6502_Disass_1_Instr(void) {
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_disNewInstruction();
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switch ( _fetch_dbg() ) {
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#include "6502_std.h" // Standard 6502 instructions
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//#include "6502_und.h" // Undocumented 6502 instructions
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#include "6502_C.h" // Extended 65C02 instructions
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default:
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dbgPrintf("%04X: Unimplemented Instruction 0x%02X\n", m6502.PC -1, _memread_dbg( m6502.PC -1 ));
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return 2;
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} // switch fetch
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return 2;
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}
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/// Turn On Debugger
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void m6502_dbg_on(void) {
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m6502.debugger.on = 1;
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}
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/// Turn Off Debugger
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void m6502_dbg_off(void) {
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m6502.debugger.on = 0;
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}
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/// Initialize Breakpoints
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void m6502_dbg_init(void) {
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m6502_dbg_on();
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m6502.debugger.wMask = 0;
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m6502.debugger.mask.hlt = 1;
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m6502.debugger.mask.brk = 1;
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m6502.debugger.mask.inv = 1;
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m6502.debugger.SP = 0xFF;
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m6502_dbg_bp_del_all();
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}
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