Citizen Systems Compact desk-top dot matrix printer CBM-910 Type II - Manual (Page 38)

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8.2 Control Code Details
(1) Command for Line Feed After Printing (CR/LF)
By entering CR (0DH)/LF (0AH) codes, data in the print buffer is printed followed
by a line feed. Without data in the print buffer, only a line feed is performed.
This command is ignored just after buffer full in case of 910 emulation.
CR and LF are valid in the following conditions.
910 Emulation
(2) SI/SO and US/RS Commands
SI/SO codes function in the same manner as US/RS as long as 8-bit data are
assigned (serial communication data bit length), which, however, are divided,
under 7-bit assignment, into SI (20H~7FH characters) print assignment and SO
(A0H~FFH characters) print assignment functions.
1. Standard letter assignment (SI/US) command:
With SI (0FH)/US (1FH) codes input, lateral enlargement is cancelled and
the data following are printed in standard letters. This command can cancel
only lateral enlargement, which dose not apply to
×4 enlargement.
DS2-ON DS2-OFF
Serial CR and LF LF only
Parallel CR and LF LF only
3110 Emulation
DS2-ON DS2-OFF
Serial CR only CR only
Parallel LF only CR only