C H A P T E R 3
Communication Channels
Figure 3-1 SCC operator encoding
Example
9 19200 2 setsccbatch
sum of decimal values :
Feature | Description | Decimal value |
|
|
|
Parity | Even | 2 |
Flow control | XON/XOFF | 0 |
Data bits | Standard | 0 |
Stop bits | 1 | 0 |
|
|
|
baud rate: 19200
channel type:
Communication Protocols
The LaserWriter Select 310 printer supports both simple and binary communication protocols for serial and parallel channels. Several character codes in both protocols are reserved for communication functions and are not passed through the PostScript interpreter. The default protocol is binary. The section “Setting Device Parameters,” “setsoftwareiomode,” in Chapter 2, describes how to change the default protocol from binary to simple.
Simple Communication Protocol
Table
Table | Reserved characters in simple communication protocol | |
|
|
|
| ASCII |
|
Character | code | Function |
3 | Interrupt. Causes execution of the PostScript language | |
|
| interrupt error. See the PostScript Language Reference |
|
| Manual, Chapter 6, for further information on interrupt. |
4 | End of file. | |
19 | Stop output (XOFF). Functional only if XON/XOFF flow | |
|
| control is in use. |
continued
Communication Protocols | 49 |