The Abort Graphic Instruction, Esc . K; The Output Buffer Size Instruction, Esc . L - HP 7470A Interfacing And Programming Manual

SYNTAX _ J
EXPLANAHDNThis instruction aborts any single device control instruc­
tion that may be partially decoded or executed. Unspecified parameters
of aborted instructions are defaulted. All pending or partially trans­
mitted output requests, from either HP—GL or device control instructions,
are immediately terminated, including output responses and handshake
parameters. Intermediate output operations such as turnaround delay
and echo suppression are aborted, and the buffer input is enabled. The
handshake and output mode parameters remain as specified.
The Abort Graphic Instruction, ESC . K
DESCMPHUN The abort graphic instruction, ESC. K, aborts any
partially decoded HP-GL instruction and discards instructions in the
buffer.
NEE The instruction can be used as part of an initialization sequence
when starting a new program or to terminate plotting of HP-GL
instructions in the buffer.
SYNTAX_ K
EXPLANATIONAny partially decoded HP-GL instruction is aborted
and all instructions in the buffer are discarded. A partially executed
instruction is allowed to finish.
The Output Buffer Size Instruction, ESC . L
DESCRIPTION The output buffer size instruction, ESC . L, outputs the
size, in bytes, of the plotter's buffer.
USES The instruction is used to obtain information on the size of the
plotter's buffer. This information might be used to determine parameters
of commands which set up handshaking.
SYNTAX ,1,
EXPLANATIONNo parameters are used. The instruction causes the
7470 to output, in ASCII, a decimal number equal to the number of
bytes in the plotter's buffer.
<DEC> 255
[TERM] Defaults to carriage return, CR, or is as set by ESC . M.
10-32 , RS-232-C/CCITT v.24 INTERFACING