Epson EPL-5000 Guide De L'utilisateur page 528

Note:
The IES setting in the above table provides automatic switching
o
between PostScript and another emulation or between LJ4L and
LQ emulation.
If ADD MEMORY appears when you exit SelecType after
o
changing the emulation mode, it means there is not enough
memory in your printer to support the emulation you selected.
When this happens, either use a different emulation or add more
memory to your printer.
INTERFACE
This menu allows you to set the delay between the ACKNLG signal
and the BUSY signal. Available settings are 0, -5, +5 microseconds,
or MIN. The MIN option sets the ACKNLG signal to high.
Menu/submenu
A INTERFACE
When you press r, the parallel submenu appears.
Menu/submenu
BUSY DELAY C 0>SET
RX-BUFFER SIZE
The RX-BUFFER (receive buffer) SIZE menu item lets you change
the size of the printer's input buffer. With an appropriate buffer size,
you can quickly transfer the contents of a file from computer memory
to printer memory. The printer then prints from its own memory,
which frees the computer for other tasks.
After you display the RX-BUFFER SIZE menu item, press r and the
following submenu appears.
Available options
>
Available options
-5, 0, +5, or MIN
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SelecType