Siemens PC 670 - Manual (Page 105)

Configuring the Computing Unit in BIOS Setup Release 04/02
5-17 Panel PC 670 Computing Unit, Equipment Manual
Printer Port Internal LPT1
Mode: Use this setting to set the operating mode of the printer interface. Refer
to the table below to ensure that the setting matches the printer
connected to the printer port.
Settable Mode Features
Output Only
Standard parallel port –
unidirectional (SPP)
S
Standard setting for the 8 bit parallel transfer
according to IEEE1284 specifications
S
Feedback of the output device is only possible via
the control cables
Bidirectional
Standard parallel port –
bidirectional
as for SPP – unidirectional, however:
S
Feedback of the output device is also possible via
the 8 bit data cables
EPP
Enhanced parallel port
S
Enhanced parallel port (data transfer rate from
500kbps up to 2Mbps)
S
Hardware handshake
S
different devices can be addressed
ECP
Extended capability port
as for EPP, however:
S
own DMA channel
S
FIFO backup
S
Data compression