IBM 5150 Hardware Reference Manual

Note: The form length
of 72 lines per page is applicable to only
the version marked with identifier code
"M72" on the
rear side
of the lower case of the Printer.
This code always initializes the printing
of the data stored in
the print buffer.
(5)
SO (Shift Out)
Whell the SO code is input, all data that follows it in the same
line
will be printed out in enlarged (double width) characters.
This code is cancelled by the printing operation or the input
of
"DC 4" code and can be input at any column position on a line.
Therefore, normal size and enlarged characters can be mixed
on the same line.
1. [DATA]
ABC 1 so 1 DEF 1 DC41 GHI ~ [!;£J
[PRINT] ABCDEFGHI
2. [DATA
ABCD
~ EFGH ~ ~ IJLK 1 SO 1 MNOP ~ ~
[PRINT ABCDEFGH
IJKLMNOP
(6) SI (Shift In)
When the SI code
is input, all data that follows it will be printed
out in condensed characters. This code is cancelled by the input
1""""\
of "DC 2" code. The SI code can be input at any column
position on a line, but all characters/symbols on the line
containing
SI code are printed out in condensed characters.
When printing condensed characters, the data capacity
of the
print buffer will become 132 columns per line.
When the
SO code is received after the input of the SI code,
condensed enlarged characters (double width
of condensed
characters) can be printed. This condition is cancelled by
"DC 4" code, and the character size returns to "condensed".
1. [DATA] ~ ABCDEFGHIJKL ~ ~
[PRINT] ABCDEFGHIJKL
2. [DATA] ABC @] DEF ~ GHIJKL ~ ~
[PRINT] ABCDEFGHIJKL
(7) DC 4 (Device Control 4)
The
DC 4 code cancels the SO mode.
[DATA] ~ ABCDEF ~ GHI 1 DC 41 JKL ~ ~
[PRINT] ABCDEFGHIJKL
2-80

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5