79 lines
2.9 KiB
C
79 lines
2.9 KiB
C
// utility.c
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// Utilities for the SplitBit CPU Emulator
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// Written by Anachronaut
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// 10/15/2024
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#include "utility.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include "../Assembler/assembly.h"
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void printHelp(const char *programName) {
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printf("Usage: %s [OPTIONS] <binaryfile>\n", programName);
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printf("\n");
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printf("Options:\n");
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printf(" -d, --debug Enable debug mode.\n");
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printf(" -c, --cycles N Stop after N cycles instead of running until the program halts.\n");
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printf(" -f, --fast Run as fast as possible, ignoring the emulated cycle rate.\n");
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printf(" -h, --help Display this help message.\n");
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}
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uint8_t parseOptions(int argc, char *argv[], EmulatorOptions *options) {
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static struct option long_options[] = {
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{"debug", no_argument, 0, 'd'},
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{"cycles", required_argument, 0, 'c'},
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{"fast", no_argument, 0, 'f'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0 }
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};
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int opt;
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int option_index = 0;
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options->debug = 0;
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options->fast = 0;
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options->cycles = 0;
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// Parse options
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while ((opt = getopt_long(argc, argv, "dc:fh", long_options, &option_index)) != -1) {
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switch (opt) {
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case 'd':
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options->debug = 1;
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break;
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case 'c': {
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// The count has to be a plain positive number. Anything else is
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// almost certainly a mistyped command line rather than a request
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// to run zero cycles.
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char *end;
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long value = strtol(optarg, &end, 10);
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if (*end != '\0' || value <= 0) {
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fprintf(stderr, "Error: --cycles needs a positive number, not \"%s\".\n", optarg);
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return OPTIONS_ERROR;
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}
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options->cycles = (unsigned long)value;
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}
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break;
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case 'f':
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options->fast = 1;
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break;
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case 'h':
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printHelp(argv[0]);
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return OPTIONS_HELP;
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default:
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printHelp(argv[0]);
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return OPTIONS_ERROR;
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}
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}
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return OPTIONS_OK;
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}
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void printRegisters(CPURegisters *cpu, uint8_t *Program, uint8_t *Data) {
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printf("***** CPU Registers *****\n");
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printf("A: 0x%02X\tB: 0x%02X\tQ: 0x%02X\tStatus: 0b%08b\n", cpu->A, cpu->B, cpu->Q, cpu->Status);
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printf("Program Counter: 0x%04X Current Instruction: 0x%02X (%s)\n", cpu->ProgramCounter, Program[cpu->ProgramCounter],getMnemonic(Program[cpu->ProgramCounter]));
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printf(" Data Pointer: 0x%04X Current Data Value: 0x%02X\n", cpu->DataPointer[0], Data[cpu->DataPointer[0]]);
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printf(" Stack Pointer: 0x%04X Current Value: (0x%02X) (0x%02X)\n", cpu->StackPointer, Data[cpu->StackPointer+1], Data[cpu->StackPointer+2]);
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}
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