4.2 I/O Address Mapping
The I/O address of the VXC series card is automatically assigned by the
main-board ROM BIOS. The I/O address can also be re-assigned by the user.
It
is strongly recommended that user does not change the I/O address.
The
plug & play BIOS will assign the correct I/O address to each VXC series
card.
The table below indicates the I/O address of the VXC-112A, VXC-142/142i
and VXC-182i series cards:
Address Read
Write
wBase+0
Same
RESET\ control register
wBase+2
Same
Aux control register
wBase+3
Same
Aux data register
wBase+5
N/A
INT mask control register
wBase+7
Aux pin status register
Same
wBase+0x2a N/A
INT
polarity control register
wBase+0xc0
Read Data from Port 1
Write Data to Port 1
wBase+0xe0
Read Data from Port 2
Write Data to Port 2
wBase+0xdc
High/low speed mode of Port 1
wBase+0xfc
High/low speed mode of Port 2
Note. Refer to Sec. 4.1 for more information regarding wBase.
VXC Cards User’s Manual (Ver. 1.1, 06/09.2005, pmh-012-01) -----33
