Lexmark T640 Technical Reference page 214

sccbatch
channel sccbatch baud option
returns the user default settings for serial communication parameters.
channel
has the following valid integer values:
9
25
If only one serial interface port is available on the printer, both
the same values. Baud and option values are returned on the stack.
baud
returns the value of the
option
returns an 8 bit value as defined in the following illustration:
7
Stop Bits
Stop Bits
This bit is always set to zero.
Data Style
01
7 data bits
11
8 data bits
Flow Control
000
XON/XOFF
001
DTR/DSR
101
DTR
110
XON/XOFF/DTR
111
XON/XOFF/DTR/DSR
Parity
00
ignore
01
odd
10
even
11
none
Errors: rangecheck, stackoverflow, stackunderflow, typecheck
4-36
menu item.
Baud
6 5 4 3
Flow Control
Data Style
PostScript
9 25
and return
2 1 0
Parity