Front Cover - Radio Shack TRS-80 MICRO Hardware Manual

Computer system
Table of Contents

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Front Cover
Interlock
The
front
cover
incorporates
a special interlock
switch
-
-
if
the
cover
is
opened,
the
printer
automatically
will stop.
When
the
cover
is
closed
securely, the printer
will
continue
to
function
as
noted above under
"Notes
regarding ribbon out
error condition".
Control
Codes
According
to
the
American
Standard code
for
Information
Interchange, there
are
32
control
codes
in
addition
to
the
codes
for
the printable
characters.
(Control codes
are sent as data,
but
the receiving
device
interprets
them
as
abbreviated
instructions,
communication-status
messages,
etc.)
The
Daisy
Printer
II
B
recognizes the following control codes
and
ignores
any
others.
Function
Backspace n/120"
(1
<
n
<
255)
Line
feed.
**
Carriage return with
line
feed
*
2
Disables underline
printing
Enables
underline
printing
1/120"
space
2/120"
space
3/120"
space
4/120"
space
5/120"
space
6/120"
space
7/120"
space
8/120"
space
9/120"
space
Reverse
line feed.
*
J
1/12"
space
mode
set
1/10"
space
mode
set
Proportional space
mode
set
Enables
Carriage return only
*
2
Disables Carriage return only
*
2
Enters External
program
mode
*
3
Exits
External
program
mode
*
3
1/48" Line
Feed
Half
line
feed
Reverse
line
feed
(half)
Decimal
Code
Octal
Hex
08,
n
010,
n
08,
n
10
012
0A
13
015
0D
14
016
0E
15
017
OF
27, 01
033,
001
IB, 01
27,
02
033,
002
IB,
02
27,
03
033,
003
IB,
03
27,
04
033,
004
IB,
04
27,
05
033,
005
IB,
05
27,
06
033,
006
IB,
06
27,
07
033,
007
IB,
07
27,08
033,010
IB,
08
27,
09
033,011
IB,
09
27,
10
033,012
IB,
0A
27, 14
033, 106
IB,
0E
27, 15
033,017
IB,
OF
27, 17
033,
021
IB,
11
27, 21
033,
025
IB, 15
27,
22
033,
026
IB, 16
27,
24
033,
030
IB, 18
27,
25
033, 031
IB, 19
27,
26
033,
032
IB,
1A
27,
28
033,
034
IB,
1C
27,
30
033,
036
IB,
IE
16

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