Omega OME-PIO-D144 manual I/O Address Map, RESET\ Control Register, Address Read Write, Reset

3.3The 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.

3.3.1RESET\ 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