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VT82C686A
Revision 1.1
April 15, 1999
-1-
Features
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VT82C686A PSIPC
PCI S
UPER
-I/O I
NTEGRATED
P
ERIPHERAL
C
ONTROLLER
PC98 C
OMPLIANT
PCI-
TO
-ISA B
RIDGE
WITH
I
NTEGRATED
S
UPER
-I/O (FDC, LPT, C
OM
1/2,
AND
IR),
I
NTEGRATED
H
ARDWARE
S
OUNDBLASTER
/D
IRECT
S
OUND
AC97 A
UDIO
,
U
LTRA
DMA-33/66 M
ASTER
M
ODE
PCI-EIDE C
ONTROLLER
,
USB C
ONTROLLER
, K
EYBOARD
C
ONTROLLER
, RTC,
D
ISTRIBUTED
DMA, S
ERIAL
IRQ, P
LUG AND
P
LAY
,
ACPI, E
NHANCED
P
OWER
M
ANAGEMENT
, SMB
US
,
AND
T
EMPERATURE
, V
OLTAGE
,
AND
F
AN
-S
PEED
M
ONITORING
Inter-operable with VIA and other Host-to-PCI Bridges
Combine with VT82C598 for a complete Super-7 (66/75/83/100MHz) PCI / AGP / ISA system (Apollo MVP3)
Combine with VT82C501 for a complete Super-7 system with integrated 2D / 3D graphics (Apollo MVP4)
Combine with VT82C691 for a complete 66 / 100 MHz Socket-8 or Slot-1 PCI / ISA system (Apollo Pro)
Inter-operable with Intel or other Host-to-PCI bridges for a complete PC98 compliant PCI / AGP / ISA system
PCI to ISA Bridge
Integrated ISA Bus Controller with integrated DMA, timer, and interrupt controller
Integrated Keyboard Controller with PS2 mouse support
Integrated DS12885-style Real Time Clock with extended 256 byte CMOS RAM and Day/Month Alarm for ACPI
Integrated USB Controller with root hub and four function ports
Integrated UltraDMA-33/66 master mode EIDE controller with enhanced PCI bus commands
PCI-2.2 compliant with delay transaction and remote power management
Eight double-word line buffer between PCI and ISA bus
One level of PCI to ISA post-write buffer
Supports type F DMA transfers
Distributed DMA support for ISA legacy DMA across the PCI bus
Serial interrupt for docking and non-docking applications
Fast reset and Gate A20 operation
Edge trigger or level sensitive interrupt
Flash EPROM, 4Mb EPROM and combined BIOS support
Supports positive and subtractive decoding