IBM 5150 Hardware Reference Manual page 103

The ESC A code is the command only to store
spacing data into the memory. In other words,
even if spacing data was transferred into the
memory, the Printer does not actually carry out
the line spacing in accordance with the spacing
data. To execute the line spacing in accordance
with the stored data, the ESC 2 code should be
followed. Namely, the ESC 2 code is considered
as the execution command for the line spacing.
[DATA] AAAAAAA ICRI
[LFl
BBBBBBB ICRI
!!£]
IESC A+24 I
CCCCCCC ICR 1
I1I]
DDDDDDD I ESC 21 ICR 1
[ill
EEEEEEE ICRI
ITIJ
FFFFFFF ICRI ILFI
[PRINT] AAAAAAA}
1/6 inch
=
12 steps/72
BBBBBBB
CCCCCCC
DDDDDDD}
1/3 inch
=
24 steps/72
EEEEEEE
FFFFFFF
Note: <How to input "n">
When "n" is actually transferred to the
Printer as data, it is transferred in the form
of a 7-bit binary number.
In case of "ESC A+24", actual output to
the Printer is performed as
<lB>H<41>H<18>H in hexadecimal
code.
2) ESC B+nl +n2+nk+NUL
(1«n>1O<66, 1<k<64, nk<nk+l)
This code specifies the vertical tab stop positions.
The first 64 valid tab stops per page are
recognized in the Printer; subsequent tab stops are
ignored.
A tab stop set at a line exceeding the form length is
ignored. Tab stop numbers must be received in
~
incremental numerical order. To execute pre ­
determined tab stop positions, the VT code should
be input. Once vertical tab stops are established,
the data will be valid until new tab stops are
specified. If no tab stop is set, the VT code
2-84