Загрузка с CD

Сижу в голом DOS'е. В CD торчит компакт на котором записан образ загрузочной дискетки. Надо с нее загрузиться. Дисковода нет. Реализация?

Грузится с компакта  ;)

Там в биосе настроечка есть такая грузиться с сидюка

Цитата Kuss, 01.03.02, 18:41:21

Там в биосе настроечка есть такая грузиться с сидюка

Ну, это если компьютер новый...

INT 13 - Bootable CD-ROM - INITIATE DISK EMULATION
     AH = 4Ah
     AL = 00h
     DS:SI -> specification packet (see #00281)
Return: CF clear if successful
     CF set on error (drive will not be in emulation mode)
     AX = return codes
SeeAlso: AH=48h,AX=4B00h,AH=4Ch,AH=4Dh

Format of Bootable CD-ROM Specification Packet:
Offset      Size      Description      (Table 00281)
00h      BYTE      size of packet in bytes (13h)
01h      BYTE      boot media type (see #00282)
02h      BYTE      drive number
           00h floppy image
           80h bootable hard disk
           81h-FFh nonbootable or no emulation
03h      BYTE      CD-ROM controller number
04h      DWORD      Logical Block Address of disk image to emulate
08h      WORD      device specification (see also #00282)
           (IDE) bit 0: drive is slave instead of master
           (SCSI)      bits 7-0: LUN and PUN
                 bits 15-8: bus number
0Ah      WORD      segment of 3K buffer for caching CD-ROM reads
0Ch      WORD      load segment for initial boot image
           if 0000h, load at segment 07C0h
0Eh      WORD      number of 512-byte virtual sectors to load
           (only valid for AH=4Ch)
10h      BYTE      low byte of cylinder count (for INT 13/AH=08h)
11h      BYTE      sector count, high bits of cylinder count (for INT 13/AH=08h)
12h      BYTE      head count (for INT 13/AH=08h)
SeeAlso: #00283,AH=08h

Bitfields for Bootable CD-ROM boot media type:
Bit(s)      Description      (Table 00282)
3-0      media type
     0000 no emulation
     0001 1.2M diskette
     0010 1.44M diskette
     0011 2.88M diskette
     0100 hard disk (drive C:)
     other reserved
5-4      reserved (0)
6      image contains ATAPI driver
7      image contains SCSI driver(s)
SeeAlso: #00281
--------d-134B00-----------------------------
INT 13 - Bootable CD-ROM - TERMINATE DISK EMULATION
     AX = 4B00h
     DL = drive number or 7Fh to terminate all emulations
     DS:SI -> empty specification packet (see #00281)
Return: CF clear if successful
     CF set on error (drive will still be in emulation mode)
     AX = return codes
     DS:SI specification packet filled
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch,AH=4Dh
--------d-134B01-----------------------------
INT 13 - Bootable CD-ROM - GET STATUS
     AX = 4B01h
     DL = drive number
     DS:SI -> empty specification packet (see #00281)
Return: CF clear if successful
     CF set on error
     AX = return codes
     DS:SI specification packet filled
Note:      same as AX=4B00h, but does not terminate emulation
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch,AH=4Dh
--------d-134C-------------------------------
INT 13 - Bootable CD-ROM - INITIATE DISK EMULATION AND BOOT
     AH = 4Ch
     AL = 00h
     DS:SI -> specification packet (see #00281)
Return: never, if successful
     CF set (error while attempting to boot)
     AX = error codes
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Dh
--------d-134D00-----------------------------
INT 13 - Bootable CD-ROM - RETURN BOOT CATALOG
     AX = 4D00h
     DS:SI -> command packet (see #00283)
Return: CF clear if successful
     CF set on error
     AX = return codes
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch

Format of Bootable CD-ROM "get boot catalog" command packet:
Offset      Size      Description      (Table 00283)
00h      BYTE      size of packet in bytes (08h)
01h      BYTE      number of sectors of boot catalog to read
02h      DWORD      -> buffer for boot catalog
06h      WORD      first sector in boot catalog to transfer
SeeAlso: #00281

Сообщение отредактировано: purpe - 31.03.02, 09:44