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[/] [eco32/] [trunk/] [monitor/] [monitor/] [common/] [boot.c] - Blame information for rev 317

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Line No. Rev Author Line
1 59 hellwig
/*
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 * boot.c -- bootstrap from disk
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 */
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#include "common.h"
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#include "stdarg.h"
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#include "romlib.h"
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#include "boot.h"
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#include "cpu.h"
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#include "mmu.h"
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#include "start.h"
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15 200 hellwig
void boot(int dskno, Bool start) {
16 59 hellwig
  Word capacity;
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  Byte sig1, sig2;
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  capacity = dskcap(dskno);
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  if (capacity == 0) {
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    printf("Disk not found!\n");
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    return;
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  }
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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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    printf("Disk error!\n");
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    return;
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  }
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  sig1 = mmuReadByte(VIRT_BOOT + 512 - 2);
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  sig2 = mmuReadByte(VIRT_BOOT + 512 - 1);
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  if (sig1 != 0x55 || sig2 != 0xAA) {
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    printf("MBR signature missing!\n");
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    return;
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  }
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  /*
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   * Boot convention:
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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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   *   $18  total number of sectors of disk or partition to boot
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   */
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  cpuSetReg(16, dskno);
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  cpuSetReg(17, 0);
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  cpuSetReg(18, capacity);
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  cpuSetPC(VIRT_BOOT);
45 200 hellwig
  if (start) {
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    cpuRun();
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  }
48 59 hellwig
}

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