Epson 5000 - Manual (Page 63)

DIP
Switches
Print direction
Printing is normally bidirectional. However, turning DIP switch 1-5
on for unidirectional printing-in which the print head prints in one
direction only-allows for precise vertical printing alignment. This
makes it ideal for printing graphics such as lines or boxes.
If DIP switch 1-5 is on, printing is unidirectional even if you select
bidirectional with the ESC U 0 software command.
High-speed draft
By setting DIP-switch 1-6 off, you can print draft characters at
speeds up to 225 cps (characters per second). The printer reduces
the number of dots in each draft-font character to increase the
printing speed.
If you select emphasized printing or condensed printing during high-
speed draft mode, printing speed temporarily switches to normal
draft speed until the enhancement is turned off. Also, if a line
contains superscript, subscript, dot-graphic, or downloaded
characters, printing speed switches to normal draft speed for that
line only.
Input buffer capacity
The printer stores data sent from your computer in its input buffer.
Keep DIP switch 1-7 off to select an 8KB buffer.
3-10 Using the Printer