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PIO-D64/PIO-
D64U User’s Manual ( Ver.1.
6, Mar. 2015, PMH-007-16 ) ----- 30
3.3 The I/O Address Map
The I/O address of PIO/PISO series card is automatically assigned by the
main board ROM BIOS. The I/O address can also be re-assigned by user.
It is
strongly recommended not to change the I/O address by user. The Plug &
Play BIOS will assign proper I/O address to each PIO/PISO series card
very well
. The I/O addresses of PIO-D64/PIO-D64U are given as follows, which
are based on the base address of each card.
Table 3-3
Address
Read
Write
wBase+0
RESET\ control register
Same
wBase+2
Aux control register
Same
wBase+3
Aux data register
Same
wBase+5
INT mask control register
Same
wBase+7
Aux pin status register
Same
wBase+0x2a INT polarity control register
Same
wBase+0xc0 DI0
DI7
DO0
DO7
wBase+0xc4 DI8
DI15
DO8
DO15
wBase+0xc8 DI16
DI23
DO16
DO23
wBase+0xcc DI24
DI31
DO24
DO31
wBase+0xd0 Read U4 8254-counter0
Write U4 8254-counter0
wBase+0xd4 Read U4 8254-counter1
Write U4 8254-counter1
wBase+0xd8 Read U4 8254-counter2
Write U4 8254-counter2
wBase+0xdc Read U4 8254 control word
Write U4 8254 control word
wBase+0xe0 Read U5 8254-counter3
Write U5 8254-counter3
wBase+0xe4 Read U5 8254-counter4
Write U5 8254-counter4
wBase+0xe8 Read U5 8254-counter5
Write U5 8254-counter5
wBase+0xec Read U5 8254 control word
Write U5 8254 control word
wBase+0xf4 Read Card ID
Note. Refer to Sec. 3.1 for more information about wBase.
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