16 PCL-734 User's Manual
Programming the PCL-734 is extremely simple. Each output channel
corresponds to a bit in the card's registers. To turn on an output
channel you write a ‘‘1” to the corresponding bit.
The card requires four I/O register addresses. 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 Chapter 2 for information on setting the card's
base address.
Register assignments are as follows:
Write Read
BASE+0 IDO bits 0-7 N/A
BASE+1 IDO bits 8-15 N/A
BASE+2 IDO bits 16-23 N/A
BASE+3 IDO bits 24-31 N/A
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