82371AB Datasheet, PDF (219/284 Pages) Intel Corporation – PCI-TO-ISA / IDE XCELERATOR PIIX4

E
82371AB (PIIX4)
11.3.5.6.
Device 5: Floppy Disk Drive
Device 5 monitors accesses to Floppy Drive Controller or GPI14.
Device 5 System Events:
— PCI accesses to IO addresses for the floppy drive, selectable below. This can cause
idle, burst, or global standby timer reloads, IO trap SMI#, or forwarding of the cycle from
PCI to ISA.
— DACK2# assertion if enabled (see below). This can cause only idle, burst, and global
standby timer reloads.
— Assertion of GPI14. The polarity of active signal (high or low) is selectable. This can
cause idle, burst, or global standby timer reloads.
Device 5 Address Ranges:
Floppy Drive:
Device 5 Idle Timer:
Resolution: 1 second
Count: 5 bit
GPI Enable:
GPI Polarity Select:
DACK2# Enable:
Device 5 ISA Forwarding Enable:
Device 5 Idle Timer Reload:
Global Standby Timer Reload:
Burst Timer Reload:
Fast or Slow Burst Select:
Idle Timer Expiration SMI#:
Trap SMI#:
3F0–3F5h, 3F7h or [FDC_MON_EN]
370–375h, 377h [FDC_DEC_SEL]
[IDL_CNTB]
[GPI_EN_DEV5]
[GPI_POL_DEV5]
[RES_EN_DEV5]
[EIO_EN_DEV5]
[IDL_EN_DEV5]
[GRLD_EN_DEV5]
[BRLD_EN_DEV5]
[BRLD_SEL_DEV5]
[IDL_EN_DEV5] [IDL_STS_DEV5]
[TRP_EN_DEV5] [TRP_STS_DEV5]
PRELIMINARY
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4/9/97 2:23 PM PIIX4aDS
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