INT 21 - CD-ROM device driver - IOCTL INPUT
        AX = 4402h
        BX = file handle referencing character device for CD-ROM driver
        CX = number of bytes to read
        DS:DX -> control block (see below)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see AH=59h)
Note:   the data returned depends on the first byte of the control block; the
          remainder of the control block is filled by the driver
SeeAlso: AX=4403h"CD-ROM",INT 2F/AX=0802h

Values for data being requested:
 00h    device driver header address
 01h    drive head location
 02h    reserved
 03h    error statistics
 04h    audio channel info
 05h    raw drive bytes (uninterpreted and device-specific)
 06h    device status
 07h    sector size
 08h    volume size
 09h    media change status
 0Ah    audio disk info
 0Bh    audio track info
 0Ch    audio Q-Channel info
 0Dh    audio sub-channel info
 0Eh    UPC code

Format of control block:
Offset  Size    Description
 00h    BYTE    data being requested (see above)
---function 00h---
 01h    DWORD   device driver header address (see also AH=52h)
---function 01h---
 01h    BYTE    addressing mode
                00h HSG
                01h Red Book
 02h    DWORD   current location of drive's head
                logical sector number in HSG mode
                frame/second/minute/unused in Red Book mode
                (HSG sector = minute * 4500 + second * 75 + frame - 150)
---function 03h---
 01h  N BYTEs   undefined as of 5 Aug 88 specification
---function 04h---
 01h    BYTE    input channel (0-3) for output channel 0
 02h    BYTE    volume for output channel 0
 03h    BYTE    input channel (0-3) for output channel 1
 04h    BYTE    volume for output channel 1
 05h    BYTE    input channel (0-3) for output channel 2
 06h    BYTE    volume for output channel 2
 07h    BYTE    input channel (0-3) for output channel 3
 08h    BYTE    volume for output channel 3
Notes:  output channels 0 and 1 are left and right, 2 and 3 are left prime and
          right prime; a volume of 00h is off
        the default setting is for each input channel to be assigned to the
          same-numbered output channel at full (FFh) volume
---function 05h---
 01h    BYTE    number of bytes read
 02h 128 BYTEs  buffer for drive bytes
---function 06h---
 01h    DWORD   device parameters (see below)
---function 07h---
 01h    BYTE    read mode
                00h cooked
                01h raw
 02h    WORD    sector size in bytes
---function 08h---
 01h    DWORD   volume size in sectors
---function 09h---
 01h    BYTE    media change status
                00h don't know
                01h media unchanged
                FFh media has been changed
---function 0Ah---
 01h    BYTE    lowest audio track number
 02h    BYTE    highest audio track number
 03h    DWORD   start address of lead-out track (Red Book format)
--function 0Bh---
 01h    BYTE    track number (set by caller)
 02h    DWORD   starting point of track (Red Book format)
 06h    BYTE    track control info
                bits 15,14,12: track type (notice: bits not contiguous!)
                        000 two audio channels, no pre-emphasis
                        001 two audio channels with pre-emphasis
                        010 data track
                        100 four audio channels, no pre-emphasis
                        101 four audio channels with pre-emphasis
                        other reserved
                bit 13: digital copy permitted
---function 0Ch---
 01h    BYTE    CONTROL and ADR byte (as received from drive)
 02h    BYTE    track number
 03h    BYTE    point or index
 04h    BYTE    minute  \
 05h    BYTE    second   > running time within track
 06h    BYTE    frame   /
 07h    BYTE    zero
 08h    BYTE    "AMIN" or "PMIN"     \
 09h    BYTE    "ASEC" or "PSEC"      > running time on disk
 0Ah    BYTE    "AFRAME" or "PFRAME" /
---function 0Dh---
 01h    DWORD   starting frame address (Red Book format)
 05h    DWORD   transfer address
 09h    DWORD   number of sectors to read
Note:   copies 96 bytes of sub-channel info per sector into buffer
---function 0Eh---
 01h    BYTE    CONTROL and ADR byte
 02h  7 BYTEs   UPC/EAN code (13 BCD digits,low-order nybble of last byte is 0)
 09h    BYTE    zero
 0Ah    BYTE    "AFRAME"

Bitfields for device parameters:
 bit 0  door open
 bit 1  door unlocked
 bit 2  supports raw reading in addition to cooked
 bit 3  writable
 bit 4  can play audio/video tracks
 bit 5  supports interleaving
 bit 6  reserved
 bit 7  supports prefetch requests
 bit 8  supports audio channel control
 bit 9  supports Red Book addressing in addition to HSG
 bit 10 audio is playing

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