Pc I/O Port Address Map - Advantech PCM-3730 User Manual

Register format
Programming the PCM-3730 is extremely simple. Each I/O
channel corresponds to a bit in the card's registers. To turn
on an output channel you write a ''1" to the corresponding
bit. To read an input port, you simply read from the register.
The card requires nine I/O register addresses, but you only
need to access the first four registers, the data registers.
The address of each register is specified as an offset from
the card's base address. For example, BASE+0 is the
card's base address and BASE+2 is the base address +
two bytes. If the card's base address is 300h, the register's
address is 302h. See "Switch and jumper settings" for
information on setting the card's base address.
Register Assignments
Address Address Write Write
Address Address Address Write Write Write
BASE+0 IDO bits 0-7
BASE+1 NA
BASE+2 DO bits 0-7
BASE+3 DO bits 8-15
6 6 6 6 6
Read Read
Read Read Read
IDI bits 0-7
NA
DI bits 0-7
DI bits 8-15

PC I/O port address map

PC I/O port address map
Range (hex) Range (hex) Range (hex) Range (hex) Range (hex) Function Function Function Function Function
000 - 1FF Base system
200 Reserved
201 Game control
202 - 277 Reserved
278 - 27F LPT2: (2nd printer port)
280 - 2F7 Reserved
2F8 - 2FF COM2:
300 - 377 Reserved
378 - 37F LPT1: (1st printer port)
380 - 3AF Reserved
3B0 - 3BF Mono Display/Print adapter
3C0 - 3CF Reserved
3D0 - 3DF Color/Graphics
3E0 - 3EF Reserved
3F0 - 3F7 Floppy disk drive
3F8 - 3FF COM1:
PCM-3730 User's Manual