4.1
Programming Commands
To prompt the Printer for a command sequence, the Printer must first
receive a special character called an "attention getter", which informs the
Printer that it is about to receive a command and the type of command it
will be. Immediate Commands, System Level Commands, and Font
Loading Commands each have their own attention getter. The attention
getter character is followed by a "command character" that tells the
Printer what action to take.
ASCII
Decimal
Char.
SOH
STX
ESC
When the Printer receives an "immediate" command it will stop whatever
it is doing and perform that command. Commands of all types must be in
the following sequence:
1. Attention Getter
2. Command Character
3. Command Parameters, (if any).
Command
Character
#
A
B
C
D
E
F
Prodigy Max Operator's Manual
HEX
Value
Value
1
01
2
02
27
1B
Table 4-1 Attention Getters
Printer
Command
Responds?
Y
Reset
Y
Send ASCII Status String to Host
N
Toggle Pause
N
Cancel
N
SOH Shutdown
Y
Send Batch Quantity
Y
Send Status Byte
Table 4-2 Immediate Commands
DOS
Attention Getter For
Prompt
Ctrl A
Immediate Commands
Ctrl B
System Level Commands
Crtl [
Bitmapped Font Loading Commands
45
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