Epson TM-300A Operator's Manual page 51

[Notes] The status to be transmitted is shown below.
•
Bit
0
1
2
3
4
5
6
7
When DTR/DSR control is selected, the printer transmits only 1
l
byte after confirming that the host is ready to receive data (DSR
signal is SPACE). If the host computer is not ready to receive
data (DSR signal is MARK), the printer will keep waiting until the
host is ready. When XON/XOFF control is selected, the printer
transmits only
The status just after processing the data received before this
l
command is transmitted after the data processing is finished.
However, if printing is executed when this command has been
processed, the status just after the current line is printed and fed
is transmitted. There may be a time lag between receiving this
command and transmitting the status, so the user should be
aware of this.
ESC{ n
Select/cancel upside-down character printing
[Name]
[Format] <1B>H<7B>H<n>
O n
[Range]
[Description] Selects or cancels upside-down character printing.
Only the lowest bit of
l
When
is selected.
When
is canceled.
[Notes] The upside-down character specification rotates normal char-
l
acters on the line by 180° and prints them.
Valid only when input at the beginning of a line.
l
n = 0
[Default]
Function
paper
Roll near-end Paper present
Undefined
Roll paper end Paper present
Undefined
Undefined
used
Not
Not used
Not used
byte without checking the DSR signal.
1
255
n
is valid.
n
= < * * * * * * * 1>B, upside-down character printing
n
= < * * * * * * * 0>B, upside-down character printing
4 5
Value
1
0
Near-end
End
-
Fixed to 0