WIP on superzazu-based emulator
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12
.gitignore
vendored
12
.gitignore
vendored
@ -1,10 +1,2 @@
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*.bin
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*.bs
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*.img
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*.com
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*.rom
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*.lst
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*.exe
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*.log
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*.sys
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/utils
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*.COM
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*.BIN
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147
HOST/em8080.c
Normal file
147
HOST/em8080.c
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@ -0,0 +1,147 @@
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// This file uses the 8080 emulator to run the test suite (roms in cpu_tests
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// directory). It uses a simple array as memory.
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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 <time.h>
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#include "8080/i8080.h"
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// memory callbacks
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#define MEMORY_SIZE 0x10000
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static uint8_t* memory = NULL;
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static bool test_finished = 0;
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static uint8_t rb(void* userdata, const uint16_t addr) {
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return memory[addr];
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}
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static void wb(void* userdata, const uint16_t addr, const uint8_t val) {
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memory[addr] = val;
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}
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uint16_t dma_addr;
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uint8_t cur_disk = 'Z'-'A';
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char filename[16];
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void filename_from_fcb(void* userdata, uint16_t addr) {
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i8080* const c = (i8080*) userdata;
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memset(&filename, 0, sizeof(filename));
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char* ptr = filename;
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while(rb(c, addr) != '.' && rb(c, addr) > ' ') {
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*ptr++ = rb(c, addr++);
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}
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if (rb(c, addr) == '.') {
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addr++;
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while(rb(c, addr) > ' ') {
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*ptr++ = rb(c, addr++);
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}
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}
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}
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void filename_to_fcb(void* userdata, uint16_t addr) {
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}
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static uint8_t port_in(void* userdata, uint8_t port) {
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i8080* const c = (i8080*) userdata;
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uint16_t de = (c->d << 8) | c->e;
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switch(c->c) {
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case 2:
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printf("%c", c->e);
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break;
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case 9:
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do {
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printf("%c", rb(c, de++));
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} while(rb(c, de) != '$');
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break;
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case 15:
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filename_from_fcb(userdata, de);
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printf("filename: %s\n", filename);
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exit(1);
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break;
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case 25:
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c->a = cur_disk;
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break;
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case 26:
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dma_addr = (c->d << 8) | c->e;
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break;
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default:
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i8080_debug_output(c);
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fprintf(stderr, "fatal: unknown syscall C=%02Xh (%d)\n", c->c, c->c);
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exit(255);
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}
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return c->a;
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}
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static int load_file(const char* filename, uint16_t addr) {
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FILE* f = fopen(filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "error: can't open file '%s'.\n", filename);
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return 1;
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}
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// file size check:
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fseek(f, 0, SEEK_END);
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size_t file_size = ftell(f);
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rewind(f);
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if (file_size + addr >= MEMORY_SIZE) {
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fprintf(stderr, "error: file %s can't fit in memory.\n", filename);
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return 1;
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}
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// copying the bytes in memory:
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size_t result = fread(&memory[addr], sizeof(uint8_t), file_size, f);
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if (result != file_size) {
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fprintf(stderr, "error: while reading file '%s'\n", filename);
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return 1;
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}
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fclose(f);
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return 0;
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}
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int main(int argc, char** argv) {
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memory = malloc(MEMORY_SIZE);
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if (memory == NULL) {
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return 255;
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}
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argc--;
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if (!argc) {
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fprintf(stderr, "No filename given\n");
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}
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i8080 cpu;
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i8080_init(&cpu);
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cpu.userdata = &cpu;
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cpu.read_byte = rb;
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cpu.write_byte = wb;
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cpu.port_in = port_in;
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memset(memory, 0, MEMORY_SIZE);
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if (load_file(argv[0], 0x100) != 0) {
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return 255;
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}
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cpu.pc = 0x100;
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// inject "hlt" at 0x0000
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memory[0x0000] = 0x76;
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// inject "in a,0" at 0x0005 (cpm syscall)
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memory[0x0005] = 0xDB;
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memory[0x0006] = 0x00;
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memory[0x0007] = 0xC9;
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while (!cpu.halted) {
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// i8080_debug_output(&cpu);
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i8080_step(&cpu);
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}
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free(memory);
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return cpu.a;
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}
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81
Makefile
81
Makefile
@ -1,88 +1,17 @@
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FLOPPY = 360
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BDOS = 0xF000
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BDOSIMG = bdos/8086.bin
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BIOS = 0xF800
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BIOSIMG = bios/8086.bin
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PROGRAMS = $(patsubst %.asm,%.com,$(wildcard com/*.asm))
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DISTFILES = $(PROGRAMS)
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ROMS =
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QEMU_ARCH = $(shell uname -m)
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QEMU = qemu-system-$(QEMU_ARCH)
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QEMU_ARGS = $(addprefix --option-rom ,$(ROMS))
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NASM = nasm
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NASM_ARGS = -s -Ilib -Plib/nasmcomp.asm -w-macro-params
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NASM_ARGS += -DBDOS=$(BDOS) -DBIOS=$(BIOS)
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EMUL = utils/emul
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ifdef KVM
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QEMU_ARGS += --enable-kvm
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endif
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ifdef DEBUG
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ROMS += rom/debug.rom
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NASM_ARGS += -l $(basename $@).lst
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endif
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ifndef DISPLAY
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QEMU_ARGS += --display curses
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endif
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.PHONY: default bootstrap clean qemu-rom qemu-floppy
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default: fdimage.img
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bootstrap:
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MAC.COM:
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wget -N http://www.cpm.z80.de/download/mac-b.zip
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unzip mac-b.zip
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# Host utils
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utils/%: src/utils/%.c
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mkdir -p utils
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$(CC) -o $@ $<
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CP437.BIN: CP437.BMP HOST/bmp2font
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HOST/bmp2font $< $@
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CP437.BIN: src/cp437.bmp utils/bmp2font
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utils/bmp2font $< $@
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# Boot sectors
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boot/%.bs: boot/%.asm
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$(NASM) $(NASM_ARGS) -DFLOPPY=$(FLOPPY) -o $@ $<
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# BIOS option roms
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rom/%.rom: rom/%.asm utils/fix-rom
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$(NASM) $(NASM_ARGS) -o $@ $< && utils/fix-rom $@
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# Regular COM programs
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com/%.com: com/%.asm
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$(NASM) $(NASM_ARGS) -o $@ $<
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bdos/%.bin: bdos/%.asm lib/*.asm
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$(NASM) $(NASM_ARGS) -o $@ $<
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bios/%.bin: bios/%.asm
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$(NASM) $(NASM_ARGS) -o $@ $<
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fdimage.img: boot/fat.bs $(BDOSIMG) $(BIOSIMG) $(DISTFILES)
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mformat -R 9 -C -i $@ -f $(FLOPPY) -B boot/fat.bs ::
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dd if=$(BDOSIMG) bs=512 seek=1 count=4 conv=notrunc of=$@
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dd if=$(BIOSIMG) bs=512 seek=5 count=4 conv=notrunc of=$@
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mcopy -i $@ $(DISTFILES) ::
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hdimage.img: boot/mbr.bs fdimage.img
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cat boot/mbr.bs fdimage.img >$@
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HOST/em8080: HOST/8080/i8080.o HOST/em8080.o
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clean:
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find -name '*.lst' -delete
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rm -f $$(cat .gitignore) boot/*.bs com/*.com rom/*.rom utils/*
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rmdir utils
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qemu-floppy: fdimage.img $(ROMS)
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$(QEMU) $(QEMU_ARGS) -boot a -fda fdimage.img
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qemu-hdd: hdimage.img $(ROMS)
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$(QEMU) $(QEMU_ARGS) -boot c -hda hdimage.img
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rm -f *.COM *.BIN HOST/bmp2font HOST/em8080 HOST/*.o
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