MEM 0040h:008Fh U - DISKETTE CONTROLLER INFORMATION [not XTIBM PC XT]
Size:	BYTE
SeeAlso: MEM 0040h:008Ch,MEM 0040h:008Dh,MEM 0040h:008Eh


Bitfields for diskette controller information:
Bit(s)	Description	(Table M0029)
 7	reserved
 6	=1 drive 1 determined
 5	=1 drive 1 is multi-rate, valid if drive determined
 4	=1 drive 1 supports 80 tracks, always valid
 3	reserved
 2	=1 drive 0 determined
 1	=1 drive 0 is multi-rate, valid if drive determined
 0	=1 drive 0 supports 80 tracks, always valid
Note:	EHD BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. sets this byte to 01h and never alters it again