A&D 191 - Manual (Page 23)

Back Space Back Space Back Space Back Space Back Space
Code 8 Code 8 Code 8 Code 8 Code 8
Line Feed Line Feed Line Feed Line Feed Line Feed
Code 10 Code 10 Code 10 Code 10 Code 10
Upon receipt of this code, the printer erases from its
buffer the previously received character. This is useful in
correcting typing errors for programs that send data both
to a video screen and the hardcopy printer. Remember
that if you type more characters than the printer can print
on a line, the printer will automatically start printing.
The printer handles this control code in exactly the same
manner as carriage return (control code 13) except when a
line feed immediately follows a carriage return. The line
feed code is ignored if it is immediately preceded by a
carriage return. The default setting is 7.6 lines per inch.
Whenever a carriage return code is received, the printer
will print out the current contents of its buffer, then clear
the buffer to get ready for additional data.
This control code tells the printer to switch to the double
height character line. The control code can be sent at any
time on a line; it need not be the first code received by the
printer after a carriage return.
You cannot mix normal and double height characters on
the same line. Once you select the double height, the
printer will remain in that mode until it receives a carriage
return or line feed. A line print caused by a buffer full
condition will not clear the double height command. This
means that the “wrap around” print line will also be
double height if the double height command was sent
before the line buffer was filled.
This control code tells the printer to switch to double
width character printing. The control code should be sent
as the first character on a line. If it is received after half the
maximum characters per line were sent then the printer
will ignore all characters on the last half of the line.
You cannot mix normal and double width characters on
the same line. Once you select the double width, the
printer will remain in that mode until it receives a carriage
return or line feed. A line print caused by a buffer full
condition will not clear the double width command. This
means that the “wrap around” print line will also be
double width if the double width command was sent
before the line buffer was filled.
1 8 1 8 1 8 1 8 1 8
Carriage Return Carriage Return Carriage Return Carriage Return Carriage Return
Code 13 Code 13 Code 13 Code 13 Code 13
Double Width Double Width Double Width Double Width Double Width
Code 15 Code 15 Code 15 Code 15 Code 15
Double Height Double Height Double Height Double Height Double Height
Code Code Code Code Code 14 14 14 14 14