Omega OME-PIO-D144 - Manual (Page 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 to the user to not change the I/O address.
The Plug & Play BIOS will assign proper I/O address to each OME-
PIO/PISO series card very well. The I/O addresses of OME-PIO-D144 are
given as follows:
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 Read 8-bit data from D/I port Write 8-bit data to D/O port
WBase+0xc4 Reserved
Select the active I/O port
WBase+0xc8 Reserved I/O Port 0-5 direction control
WBase+0xcc Reserved I/O Port 6-11 direction control
WBase+0xd0 Reserved I/O Port 12-17 direction control
Note. Refer to Sec. 3.1 for more information about wBase.
3.3.1 RESET\ Control Register
(Read/Write): wBase+0
Bit 7
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Reserved Reserved Reserved Reserved Reserved Reserved Reserved RESET\
Note. Refer to Sec. 3.1 for more information about wBase.
When the PC is first powered up, the RESET\ signal is in Low-state. This will
disable all D/I/O operations. The user has to set the RESET\ signal to High-state
before any D/I/O command.
outp(wBase,1);
/* RESET\=High Æ all D/I/O are enable now */
outp(wBase,0); /* RESET\=Low Æ all D/I/O are disable now */
OME-PIO-D144 User’s Manual (Ver.2.1, Sep/2001) ---- 28