/*
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/*
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* boot.c -- bootstrap from disk
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* boot.c -- bootstrap from disk
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*/
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*/
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#include "common.h"
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#include "common.h"
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#include "stdarg.h"
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#include "stdarg.h"
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#include "romlib.h"
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#include "romlib.h"
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#include "boot.h"
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#include "boot.h"
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#include "cpu.h"
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#include "cpu.h"
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#include "mmu.h"
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#include "mmu.h"
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#include "start.h"
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#include "start.h"
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void boot(int dskno) {
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void boot(int dskno, Bool start) {
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Word capacity;
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Word capacity;
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Byte sig1, sig2;
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Byte sig1, sig2;
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capacity = dskcap(dskno);
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capacity = dskcap(dskno);
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if (capacity == 0) {
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if (capacity == 0) {
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printf("Disk not found!\n");
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printf("Disk not found!\n");
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return;
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return;
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}
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}
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printf("Disk with 0x%08X sectors found, booting...\n", capacity);
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printf("Disk with 0x%08X sectors found, booting...\n", capacity);
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if (dskio(dskno, 'r', 0, PHYS_BOOT, 1) != 0) {
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if (dskio(dskno, 'r', 0, PHYS_BOOT, 1) != 0) {
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printf("Disk error!\n");
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printf("Disk error!\n");
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return;
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return;
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}
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}
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sig1 = mmuReadByte(VIRT_BOOT + 512 - 2);
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sig1 = mmuReadByte(VIRT_BOOT + 512 - 2);
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sig2 = mmuReadByte(VIRT_BOOT + 512 - 1);
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sig2 = mmuReadByte(VIRT_BOOT + 512 - 1);
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if (sig1 != 0x55 || sig2 != 0xAA) {
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if (sig1 != 0x55 || sig2 != 0xAA) {
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printf("MBR signature missing!\n");
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printf("MBR signature missing!\n");
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return;
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return;
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}
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}
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/*
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/*
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* Boot convention:
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* Boot convention:
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* $16 disk number of boot disk
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* $16 disk number of boot disk
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* $17 start sector number of disk or partition to boot
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* $17 start sector number of disk or partition to boot
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* $18 total number of sectors of disk or partition to boot
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* $18 total number of sectors of disk or partition to boot
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*/
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*/
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cpuSetReg(16, dskno);
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cpuSetReg(16, dskno);
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cpuSetReg(17, 0);
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cpuSetReg(17, 0);
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cpuSetReg(18, capacity);
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cpuSetReg(18, capacity);
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cpuSetPC(VIRT_BOOT);
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cpuSetPC(VIRT_BOOT);
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if (start) {
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cpuRun();
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cpuRun();
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}
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}
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}
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No newline at end of file
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No newline at end of file
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