Connect Tech Echo/ISA Manual do Utilizador descarregar pdf (Página 20)

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.

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