PEX/PIO/PISO-DA Series Card
Analog Output Boards
User Manual/ Ver. 3.1/ Oct. 2013/ PMH-0010-31/ Page: 60
6.3
The I/O Address Map
The I/O address for PEX-DAx, PISO-DAxU and PIO-DAxU series cards is automatically
assigned by the ROM BIOS of the PC and provides Plug&Play capabilities for PIO/PISO
series cards. The PEX-DAx, PISO-DAxU and PIO-DAxU series I/O addresses are
mapped as follows:
for more information about wBase.
Address
Read
Write
wBase+0
Reserved
RESET\ control register
wBase+2
Reserved
Aux control register
wBase+3
Aux data register
Aux data register
wBase+5
Reserved
INT mask control register
wBase+7
Aux pin status register
Same
wBase+0x2a
Reserved
INT polarity control register
wBase+0xc0
Read 8254-Counter0
Write 8254-Counter0
wBase+0xc4
Read 8254-Counter1
Write 8254-Counter1
wBase+0xc8
Read 8254-Counter2
Write 8254-Counter2
wBase+0xcc
Read 8254 control word
Write 8254 control word
wBase+0xd4
Read the Card ID
Reserved
wBase+0xe0
Read the Low byte of D/I
DA_0 chip select
wBase+0xe4
Read the High byte of D/I
DA_1 chip select
wbase+0xe8
Read the Low byte of D/I
(for PEX/PIO-DA only)
DA_2 chip select
wBase+0xec
Read the High byte of D/I
(for PEX/PIO-DA only)
DA_3 chip select
wBase+0xf0
Read the Low byte of D/I
(for PEX/PIO-DA only)
Write the Low byte of D/A
wBase+0xf4
Read the High byte of D/I
(for PEX/PIO-DA only)
Write the High byte of D/A
wBase+0xf8
Read the Low byte of D/I
(for PEX/PIO-DA only)
Write the Low byte of D/O
wBase+0xfc
Read the High byte of D/I
(for PEX/PIO-DA only)
Write the High byte of D/O
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