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CBM-920 User’s Manual
34 CITIZEN
(2) SI, SO and US, RS command
In case the 8 bit data is specified (data bit length of serial communication), the function of SI and SO codes
is same as the function of US and RS. But in case 7 bit data is specified, SI, SO works for specifying of SI
side (characters from 20H to 7FH) and for specifying of SO side (characters from A0H to FFH)
1 Standard character specifying (SI, US) command By inputting SI (0FH) and US (1FH) codes, printer
cancels the double wide characters and the data after this command is printed in standard characters.
The characters can be canceled by this command is only double wide character, double wide and
double high character can not be canceled.
2 Double wide character specifying (SO, RS) command By inputting SO (0EH) and RS (1EH) into the
nominated columns, the data after this command is printed in double wide character. This is canceled
by line feed operation or inputting SI or US command. Although both of standard character and double
wide character can exist in one line.
When the total characters goes to 24 (40) columns on the basis of calculation at standard character
basis, printer performs automatic printing (buffer full printing)
<Receive data>
SO 1234567890 CR
SO 1 2 3 SI ABCD CR
SO 1 2 3 SI ABC SO 12 CR
A SO 12345678901B