Programmer's Guide; Receiving Characters And Commands - Tektronix 4643 Operator's Manual

Character
BS
HT
LF
The 4643 receives commands as well as characters to
be printed in the form of seven- bit ASCII codes . The
only ASCII control codes recognized by the 4643 are
listed in Table 3-1 .
FF
CR
SO
DC2
Table 3-1
ASCII CONTROL CHARACTERS RECOGNIZED
DEL
010
011
012
Octal
Equivalent
Function
014
015
016
022
Section 3
PROGRAMMER'S GUIDE
RECEIVING CHARACTERS AND COMMANDS
177
4643 PRINTER OPERATOR'S
Backspace.
8 position horizontal tab .
Performs a print cycle and a
carriage return , and advances
paper one line.
Performs a print cycle and a
carriage return and advances
the paper to the first printable
line at the top of the next form .
Causes all characters in the
4643 memory to be printed
and performs a carriage return .
Sets expanded print mode for
present line when in 10 CPI
switched mode.
Sets compressed print mode
for present line when in 10 CPI
switched mode .
Clears memory of all data.
NOTE
Recognized paper motion commands print out the
buffer prior to executing the command .
Table 3-2 will be useful when writing programs that
interface with the 4643. Table 3-2 lists the seven- bit
ASCII codes and indicates the operation performed by
the 4643 with each specific code it receives.
3-1