
82371AB (PIIX4)
E
218
4/9/97 2:23 PM PIIX4aDS
INTEL CONFIDENTIAL
(until publication date)
PRELIMINARY
11.3.5.5.
Device 4: Audio
Device 4 monitors an audio subsystem and GPI13. The available address ranges encompass the
following types of audio devices, 8/16-bit Sound Blaster, standard Game Port, ADLIB music
synthesizer, Microsoft Sound System, and MIDI. The actual address ranges selectable for each type
is shown below.
Device 4 System Events:
— PCI accesses to any of the enabled IO addresses (see below). This can cause idle,
burst, or global standby timer reloads, IO trap SMI#, or forwarding of the cycle from PCI
to ISA.
— DACKx# assertion (x=0,1,3,5,6,7) if enabled (see below). This can cause only idle,
burst, and global standby timer reloads.
— Assertion of GPI13. The polarity of active signal (high or low) is selectable. This can
cause idle, burst, or global standby timer reloads.
Device 4 Address Ranges:
Sound Blaster 8/16:
220
–
22Fh, 230
–
233h or
240
–
24Fh, 250
–
253h or
260
–
26Fh, 270
–
273h or
280
–
28Fh, 290
–
293h
200
–
207h
388
–
38Bh
530
–
537h or
604
–
60Bh or
E80
–
E87h or
F40
–
F47h
300
–
303h or
310
–
313h or
320
–
323h or
330
–
333h
[SB_EN]
[SB_SEL]
Game Port:
ADLIB Synthesizer:
Microsoft Sound System:
[GAME_EN]
[SB_EN]
[MSS_EN]
[MSS_SEL]
MIDI:
[MIDI_EN]
[MIDI_SEL]
Device 4 Idle Timer:
Resolution: 1 second
Count: 5
bit
GPI Enable:
GPI Polarity Select:
DACKx# Enables:
Device 4 ISA Forwarding Enable:
Device 4 Idle Timer Reload:
Global Standby Timer Reload:
Burst Timer Reload (Fast Burst Only):
[BRLD_EN_DEV4]
Idle Timer Expiration SMI#:
Trap SMI#:
[IDL_CNTB]
[GPI_EN_DEV4]
[GPI_POL_DEV4]
[DACKx_EN_DEV4] where x=0,1,3,5,6,7
[EIO_EN_DEV4]
[IDL_EN_DEV4]
[GRLD_EN_DEV4]
[IDL_EN_DEV4]
[TRP_EN_DEV4]
[IDL_STS_DEV4]
[TRP_STS_DEV4]