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edge, 3. positive level, and 4. neg
ative level. It is also possible
to continuously gate data, into the
latch.
2. Use PIO Status Signals to generate
Interrupts or to be simply ^mon
itored by the Program via the
Control Port.
STATUS SIGNALS
The PIO Status Signals which are provided
are as follows:
ODR- one Output Data Ready line for
each Parallel Output Port;
IDA- one Input Data Accepted
for each Parallel Input Port.
As with the SlO.Port, an additional sig
nal, PIOS, is provided to enhance the
efficiency of the Control Port Input Bits.
EXTERNAL INTERFACE CONNECTIONS
The External Interface Connections for the
PIO Output Ports provide for 8 Output Data
Lines and 3 Control/Handshake Lines.
Each Input Port provides for 8 Input Data
Lines and 2 Control/Handshake Lines.
All signals are available at two identical
26 pin edge connectors for easy interfacing
to external parallel I/O devices.
CASSETTE INPUT/OUTPUT PORT
The MIO Board provides for one complete
Cassette Recorder Interface.
BOARD OPTIONS
Board Options allow the User to:
1. Vary the recording rate from 500
to 62,500 bits per second.
2. Set the phase of the recorded sig
nal to provide compatibility with
most all audio cassette recorders.
MIO
Functional Description
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