User`s guide

serialbuffersize
Syntax: serialbuffersize integer
Function Returns size of the serial communications buffer.
setserialbuffersize
Syntax: integer setserialbuffersize
Function Sets the serial host buffer size. This size is forced to the
nearest larger 2k boundary. Also, you must cycle the
printer off and on for this command to take effect.
Default size = 8192 bytes
Minimum size = 4096 bytes
Maximum size = limited to available memory
parallelbuffersize
Syntax: parallelbuffersize integer
Function Returns size of the parallel communications buffer.
setparallelbuffersize
Syntax: integer setparallelbuffersize
Function Sets the parallel host buffer size. This size is forced to
the nearest larger 2k boundary. Also, you must cycle
the printer off and on for this command to take effect.
Default size = 8192 bytes
Minimum size = 4096 bytes
Maximum size = limited to available memory
Chapter 10
10-22 PostScript: Operator Dictionary