Digital488 User’s Manual 7-17-01 Command Descriptions, 3-13
The status returned after receiving a U1 through U40 is an ASCII character '1' or '0', depending on the level
of the line, and the state of the Invert command (I16).
CLEAR 718
reset the Digital488
OUTPUT 718;"U22X"
request the status of bit 22
ENTER 718;A$
read the status bit
DISP A$
display shows a 0 (dependent on the signal
applied to the input)
Below is a summary of the Status (U0) information.
C# Configuration
C0
All ports are inputs
C1
Port 1 is an output, ports 2 thru 5 are inputs
C2
Ports 1 and 2 are outputs, ports 3 thru 5 are inputs
C3
Ports 1 thru 3 are outputs, ports 4 and 5 are inputs
C4
Ports 1 thru 4 are outputs, port 5 is an input
C5
All ports are outputs
E# Error Message
0
No error
1
Unrecognized command (ex. W3)
2
Illegal command option (ex. F8)
3
Conflict (attempt to output data to an input port)
4
ROM error
5
RAM error
F# Data Format
F0
Hexadecimal
F1
ASCII
F2
Binary
F3
Decimal
F4
High Speed Binary
I### Invert Control Lines
I0
All control and data lines are active high
I1
Inhibit output is active low
I2
Trigger output is active low
I4
Data Strobe output is active low
I8
Clear output is active low
I16
Data is active low
I32
EDR input is falling edge sensitive
I64
Service input is falling edge sensitive
Note: the status indication reflects the sum of all received Invert commands.
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