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is shown in Table 4.
CONT BIT
4
5
6
7
Table 4 - Control Selection of PIO and SIO Status
Value of Control Signal Available from Input Selector
Bit 7
0
0
1
1
- 10
Table 3 - Control of CRI and PIO
VALUE
USE
Enable CRI Write Circuitry
1
0
Disable CRI Write Circuitry
1
Enable CRI Read Circuitry
0
Disable CRI Read Circuitry
1
Enable CRI Ready on each bit
0
Enable CRI Ready on each byte
1
Select PIO Port 2
0
Select PIO Port 1
Bit 6
PIOS
Port 1 Output Data
0
Ready
Port 1 Input Data
1
accepted
Port 2 Output Data
0
Ready
Port 2 Input Data
1
accepted
The decoding for this function
Error = PE or FE or OE
Overrun Error (OE)
Parity Error (PE)
Framing Error (FE)
MIO
User Guide
SIOS
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