82443MX Datasheet, PDF (59/173 Pages) Intel Corporation – PCIset

82443MX PCIset
I/O
Alias
Address
Register Name/Function
Bus
Master
Access
Forwarded
to ISA/EIO?
Default
Value
Reg.
Type
00Ch
01Ch
DMA Clear Byte Pointer (Ch 0-3)
CPU / PCI Never
XXh
WO
00Dh
01Dh
DMA Master Clear Register. (Ch 0-3) CPU / PCI Never
XXh
WO
00Eh
01Eh
DMA Clear Mask Register (Ch 0-3) CPU / PCI Never
XXh
WO
00Fh
01Fh
Write All Mask (Ch 0-3)
CPU / PCI Never
01h
R/W
020h
024, 028, INT1 Control Register
CPU / PCI Never
R/W
02C, 030,
034, 038,
03C
021h
025, 029, INT1 Mask Registers
CPU / PCI Never
R/W
02D, 031,
035, 039,
03D
040h
050h
Timer/Counter 1 - Counter 0 Count CPU / PCI Never
R/W
041h
051h
Timer/Counter 1 - Counter 1 Count CPU / PCI Never
R/W
042h
052h
Timer/Counter 1 - Counter 2 Count CPU / PCI Never
R/W
043h
053h
Timer/Counter 1 - Cmnd Mode
CPU / PCI Never
W/O
060h
062h
KBC Input Buffer
CPU / PCI If enabled
WO
060h
062h
KBC Output Buffer
CPU / PCI If enabled
RO
060h
062h
Reset X-Bus IRQ12 and IRQ1
CPU / PCI Never
N/A
RO
061h
063, 065, NMI Status and Control Register
CPU / PCI Never
00h
R/W
067h
62h, 66h —
Microcontroller Chip Select
CPU / PCI If enabled
R/W
064h
—
KBC Status Register
CPU / PCI If enabled
WO
064h
—
KBC Command Register
CPU / PCI If enabled
RO
070h
072, 074, NMI Mask (bit 7)
076h
CPU / PCI If RTC
WO
disabled and
not on PCI
070h
072, 074, RTC Index Register
CPU / PCI If RTC
R/W
076h
(Not aliased to 072h if extended RAM
disabled and
enabled)
not on PCI
071h
073, 075, RTC Data Register
CPU / PCI If RTC
R/W
077h
(Not aliased to 73h if extended RAM
disabled and
enabled)
not on PCI
072h
—
RTC Extended Index Register
CPU / PCI If enabled
R/W
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