Int 13 Fn 4A  - Bootable Cd-rom - Initiate Disk Emulation                  [d]

   AH = 4Ah
   AL = 00h
   DS:SI -> specification packet (see #0211)

Return: CF clear if successful
   CF set on error (drive will not be in emulation mode)
   AX = return codes

See Also: AH=48h,AX=4B00h,AH=4Ch,AH=4Dh

Format of Bootable CD-ROM Specification Packet:
Offset Size    Description (Table 0211)
 00h   BYTE    size of packet in bytes (13h)
 01h   BYTE    boot media type (see #0212)
 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 #0212)
       (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)

See Also: #0213,AH=08h

Bitfields for Bootable CD-ROM boot media type:
Bit(s) Description (Table 0212)
 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)

See Also: #0211