Apple LaserWriter Select 310 Printer - Manual (Page 46)

C H A P T E R 2
LaserWriter Select 310 Software
34 Setting Compatibility Operators
sccbatch 2
setpacketbackchannel 2
Syntax channel sccbatch baud options
Definition This operator returns the baud rate and options for the specified serial
channel. Channel 9 only is available with this printer.
baud and options affect the following device parameters:
■ Baud, StopBits, and FlowControl
■ DataBits and Parity
■ CheckParity
See “setsccbatch” for further information.
The values for data bits and parity are determined by the bit positions.
See the section “SCC Operator Encoding” in Chapter 3.
Baud, stop bits, and flow control are determined respectively by the
corresponding settings for Baud, StopBits, and FlowControl
device parameters.
Standard value: 57600 68
This value represents an 8-pin serial channel with a baud rate
of 57600, space parity, DTR flow control, 8 data bits, and one stop bit.
(See Table 3-6.)
Errors rangecheck , stackoverflow, stackunderflow, typecheck
Syntax bool setpacketbackchannel –
Definition This operator sets the serial communications back channel packet DTR
protocol to be on if bool is true, or off if bool is false. The packet
protocol is used exclusively by the Apple LaserWriter driver and should
be set by it only.
Errors invalidaccess , stackunderflow, typecheck