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Examinemos el programa:
/* Solo programa a la imagen del cargador del defecto de la carga a la diskette ilegible */
#include <bios.h>
#include <stdio.h>
int main(void)
{
struct diskinfo_t dinfo;
union REGS regs;
int result, i;
/* Imagen del cargador que se cargará en la impulsión de diskette */
static char dbuf[512]=
{
0xEB,0x3E,0x90,0x2B,0x29,0x6E,0x70,0x32,0x49,0x48,0x43,0x0,0x2 ,0x1 ,0x1 ,0x0,
0x2,0xE0,0x0,0x40,0xB,0xF0,0x9,0x0,0x12, 0x0 ,0x2 ,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x29, 0x24,0x3B,0xDB, 0x16,0x4E, 0x4F, 0x20, 0x4E,0x41,0x4D,0x45,
0x20, 0x20, 0x20,0x20,0x46,0x41, 0x54,0x31, 0x32,0x20,0x20, 0x20,0xF1,0x7D, 0xFA,
0x33, 0xC9,0x8E,0xD1, 0xBC,0xFC,0x7B, 0x16,0x7 ,0xBD,0x78,0x0 ,0xC5,0x76,0x0,
0x1E,0x56,0x16,0x55, 0xBF,0x22,0x5 ,0x89,0x7E,0x0 ,0x89,0x4E,0x2 ,0xB1,0xB,0xFC,
0xF3,0xA4,0x6 ,0x1F,0xBD,0x0,0x7C ,0xC6,0x45,0xFE,0xF,0x8B, 0x46,0x18,0x88,0x45,
0xF9,0xFB,0x38,0x66,0x24,0x7C,0x4,0xCD,0x13,0x72,0x3C,0x8A,
0x46,0x10,0x98,0xF7,
0x66,0x16,0x3,0x46,0x1C,0x13,0x56,0x1E,0x3 ,0x46,0xE,0x13,
0xD1,0x50,0x52,0x89,
0x46,0xFC,0x89,0x56,0xFE,0xB8,0x20,0x0,0x8B,0x76,0x11,0xF7,
0xE6,0x8B,0x5E,0xB ,
0x3 ,0xC3,0x48,0xF7,0xF3,0x1,0x46,0xFC, 0x11,0x4E,0xFE,0x5A,
0x58,0xBB,0x0 ,0x7 ,
0x8B,0xFB,0xB1,0x1, 0xE8,0x94,0x0 ,0x72,0x47,0x38,0x2D,0x74,0x19,0xB1,0xB,0x56,
0x8B,0x76,0x3E,0xF3,0xA6,0x5E,0x74,0x4A,0x4E,0x74,0xB,0x3 , 0xF9,0x83, 0xC7, 0x15,
0x3B, 0xFB,0x72,0xE5,0xEB,0xD7,0x2B, 0xC9,0xB8,0xD8, 0x7D, 0x87, 0x46, 0x3E,0x3C,
0xD8,0x75,0x99, 0xBE,0x80,0x7D,0xAC,0x98,0x3,0xF0,0xAC,0x84,0xC0,0x74,0x17,0x3C,
0xFF,0x74,0x9 ,0xB4,0xE ,0xBB,0x7 ,0x0,0xCD,0x10,0xEB, 0xEE,0xBE,0x83,0x7D, 0xEB,
0xE5, 0xBE, 0x81,0x7D,0xEB,0xE0, 0x33,0xC0,0xCD,0x16,0x5E,0x1F,0x8F,0x4 ,0x8F,0x44,
0x2,0xCD, 0x19,0xBE,0x82,0x7D,0x8B,0x7D,0xF,0x83,0xFF,0x2,0 x72,0xC8, 0x8B,0xC7,0x48,
0x48,0x8A,0x4E,0xD,0xF7,0xE1,0x3 ,0x46,0xFC, 0x13,0x56,0xFE,0xBB,0x0 ,0x7 ,0x53,0xB1,0x4 ,
0xE8,0x16,0x0, 0x5B,0x72,0xC8,0x81,0x3F,0x4D,0x5A,0x75,0xA7,0x81,0xBF,0x0,0x2 ,0x42,0x4A,
0x75,0x9F,0xEA,0x0 ,0x2 ,0x70,0x0,0x50,0x52, 0x51, 0x91, 0x92, 0x33, 0xD2,0xF7,0x76,0x18,0x91,
0xF7,0x76, 0x18,0x42, 0x87, 0xCA, 0xF7, 0x76,0x1A,0x8A,0xF2,0x8A,0x56, 0x24,0x8A,0xE8,
0xD0, 0xCC,0xD0,0xCC,0xA,0xCC,0xB8,0x1,0x2, 0xCD,0x13,0x59,0x5A, 0x58, 0x72,0x9,0x40,
0x75,0x1,0x42,0x3, 0x5E,0xB,0xE2,0xCC,0xC3,0x3 ,0x18 ,0x1 ,0x27,0xD ,0xA,0x49, 0x6E,
0x76,0x61,0x6C,0x69,0x64,0x20, 0x73, 0x79, 0x73, 0x74, 0x65,0x6D,0x20,0x64,0x69,0x73,
0x6B,0xFF,0xD ,0xA,0x44,0x69, 0x73,0x6B,0x20, 0x49,0x2F, 0x4F,0x20, 0x65,0x72, 0x72,0x6F,
0x72,0xFF,0xD ,0xA,0x52,0x65,0x70,0x6C,0x61,0x63,0x65,0x20,
0x74,0x68, 0x65, 0x20,
0x64, 0x69,0x73, 0x6B,0x2C,0x20,0x61, 0x6E,0x64,0x20,0x74, 0x68, 0x65, 0x6E, 0x20,0x70,
0x72,0x65, 0x73,0x73, 0x20,0x61,0x6E,0x79,0x20,0x6B,0x65,0x79,0xD,0xA, 0x0,0x49,0x4F,
0x20,0x20,0x20,0x20,0x20,0x20,0x53,0x59,0x53,0x4D, 0x53, 0x44, 0x4F, 0x53,0x20,0x20,
0x20,0x53,0x59,0x53, 0x80,0x1,0x0 ,0x57,0x49,0x4E,0x42,0x4F,0x4F,0x54,0x20,0x53, 0x59
,0x53,0x0,0x0,0x55,0xAA};
clrscr();
dinfo.drive = 0x00; /* número de impulsión para A:*/
dinfo.head = 0; /* número principal del disco */
dinfo.track = 0; /*número de la pista */
dinfo.sector = 1; /* número del sector */
dinfo.nsectors = 1; /*cuenta de sector*/
dinfo.buffer = dbuf; /* almacenador intermediario de los datos */
gotoxy(10,9);
cprintf("El procurar leer en la impulsión de diskette:\n");
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