Lexicon MPX-1 User Manual

be of higher priority than others? What if certain inter·
rupts must
be disabled while others are to be enabled?
The possible variations go
on, but they all add up to one
theme;
to provide greater flexibility using the interrupt
service method, hardware requirements increase.
So, we're caught in the middle. The status poll method
i"'R less Jiesirab1e way of ser,!i_cing _"0 in terms of
,., MCS·80™-8259A OVERVIEW
In an MCS·80-8259A interrupt configuration, as in
Figure
2, a device may cause an interrupt by pulling one
of the 8259A's interrupt request pins
(IRO-1R7) high. If
the 8259A accepts the interrupt request (this depends
on
its programmed condition), the 8259A's INT (inter·
rupt) pin will go high, driving the 8080A's INT pin high.
The 8080A
can receive an interrupt request any time,
o '- -- •• __ ... "" Th .. RnRnA. how-

Lexicon MPX-1 Specifications

General

Brand	Lexicon
Model	MPX-1
Category	Recording Equipment
Language	English