Compaq P5000 Series - Manual (Page 111)

Parallel Submenu
111
Bidirectional Submenu
The IEEE 1284 (Bidirectional) interface is faster and more versatile than
Centronics and supports bidirectional communication. Chapter 5 discusses
the available modes (Compatibility, Nibble, and Byte) in more detail.
Buffer Size in K
This option configures the amount of memory allocated for the 1284 parallel
port buffer. The default is 8 Kbytes, but you can specify between 1 and 16
Kbytes, in 1-Kbyte increments.
Parallel
(from page 103)
Buffer Size in
K
8*
(1-16)
* = Factory Default
Bidirectional