82091AA Datasheet, PDF (126/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
8 1 7 DIR DIGITAL INPUT REGISTER
I O Address
Default Value
Attribute
Size
Base ^a7h
00h
Read Only
8 bits
This register is read only in all modes In PC-AT mode only bit 7 is driven and all other bits remain tri-stated
Figure 62 Digital Input Register
290486 – 62
Bit
Description
7 DISK CHANGE (DSKCHG) This bit monitors a disk change in the floppy disk drive DSKCHG is set
to a 1 when the DSKCHG signal on the floppy interface is asserted DSKCHG is set to a 0 when
the DSKCHG signal on the floppy interface is negated During powerdown this bit is invalid
6 0 NOT USED These bits are tri-stated during a read
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