MSX CD extension for IDE version #1.3 
Original for MEGASCSI copyrighted 1995 by Taro Kashiwazaki
Patched for Sunrise ATA-IDE interface by Jon De Schrijder

Usage:
	IDECDEX
		To install the CD-ROM driver
	IDECDEX /RELEASE
		To release the CD-ROM driver

New in this version #1.3 (fixed by Louthrax):
*Fixed bug in the MSX-DOS 2 function 4Ah (Move file handle pointer)
when using method 2 (Relative to the end of the file). The addition
logic to compute the new file offset was wrong.
*Fixed bug in the MSX-DOS 2 function 44h (Create file handle). This
function was  not supposed  to  be  called for  CD-ROM (which   are
read- only) and was corrupting MSX-DOS 2 system in some cases.

New in this version #1.2:
*ability to access multi-session CDROMs !!!

New in version #1.1:
*drivenumber  bugfix  (when the  IDE  interface was  not  the first
diskrom)
*Also the CD's volume name is shown (first eleven characters).  The
version for SCSI does not feature this :)

Version #1.0: initial release

Finally it is finished! A DOS2 CDROM driver for the Sunrise ATA-IDE
interface! It is based on the MSXCDEX program for MEGASCSI by  Taro
Kashiwazaki who  gave me  the permission  to use  some parts of his
code.

IDECDEX will only work with IDE bios #1.92 or higher. When a  CDROM
is connected to your computer, bios 1.92 will create a  driveletter
for  it.  (Make sure  that  you don't  have  6 harddisk  partitions
enabled; because in that case, there  will be no more room left  to
create the CDROM driveletter!)

As  long as  IDECDEX is  not installed,  the drive  will return  an
error. After  installing IDECDEX  by starting  it, the  first CDROM
drive will be accessible like  a normal drive. More than  one CDROM
drive is not supported (yet).

Only  disk  operations  which  make use  of  the  DOS2  file handle
functions  are  supported, no  FCB  operations! (like  used  in MM,
Compass (ok, I'll change that :) ), ...)

IDECDEX uses one  free 16kB memory  segment in the  primary mapper.
Therefore it can be  useful to uninstall it;  this can be done  by:
IDECDEX /RELEASE

Have fun with it!!!

Jon
