FDC37M81x SMSC Corporation, FDC37M81x Datasheet - Page 120

• Manufacturer Part Number: FDC37M81x
• Description: PC98/99 Compliant Enhanced Super I/O Controller
• Manufacturer: SMSC Corporation

KEYBOARD ISA INTERFACE
The FDC37M81x ISA interface is functionally
compatible with the 8042 style host interface. It
consists of the D0-7 data bus; the nIOR, nIOW
and
Note 1: These registers consist of three separate 8 bit registers. Status, Data/Command Write and Data
ISA ADDRESS
0x60
0x64
the
Read.
Status
nIOW
0
1
0
1
register,
nIOR
Table 47 - ISA I/O Address Map
Input
0
0
1
1
Data
BLOCK
KDATA
KDATA
KDCTL
KDCTL
120
register, and Output Data register. Table 47 shows
how the interface decodes the control signals. In
addition to the above signals, the host interface
includes keyboard and mouse IRQs.
Keyboard Data Write (C/D=0)
Keyboard Data Read
Keyboard Command Write (C/D=1)
Keyboard Status Read
FUNCTION (NOTE 1)