2-4 Chapter 2: Hardware Installation
Echo
User's Manual, ver. 0.00
Status Port Address
The Echo board provides a status port that indicates which ports,
if any, are causing the interrupts. When read, the port will
indicate a one (1) if the corresponding port has an interrupt
request pending and a zero (0) if not. The least significant data
bit (D0) represents the status of port 1.
In multi-card installations the address for the status port on each
card must be unique. DIP switch 7, combined with the selection
of the port addresses on DIP switches 3, 4 and 5, determines the
status port address.
Tables 1
and
2
indicate the relationship.
Custom Status Port Addresses
Custom status port addresses are available with the Echo/ISA.
Please contact Connect Tech Customer Support for more details.