Intermec 6100 Reference Guide

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NPCP  Printer=NOR4800,LPT1.DOS,15,45 tells Windows that there is a printer

named NPCP Printer that uses the NOR4800 printer driver to print, using the

DOS device LPT1 with 15Ćsecond device timeĆout and 45Ćsecond retry timeĆout.

[devices]
NPCP Printer=NOR4800,LPT1.DOS

NPCP Printer=NOR4800, LPT1.DOS tells Windows that there is a printer

named NPCP Printer that uses the NOR4800 printer driver to print, using the

DOS device LPT1.  This section is included for compatibility with older Windows

applications and should match the entry in the 

[PrinterPorts]

 section of the

WIN.INI file (listed above).

[boot] 
drivers=power irda pen penwindows scanner npcp

drivers= tells Windows to load the installable drivers.  This list of drivers is the

standard driver list (in the order that it needs to be).  The significant driver here,

is npcp.  This is just a token name for the driver.  The actual driver name is speĆ

cified in the following [

drivers

] section of the SYSTEM.INI file:

[drivers]
npcp=nornpcp.drv

npcp= tells Windows the actual name of the installable driver named in the

[boot]

 section of the SYSTEM.INI file (listed above).

[NPCP Driver] 
PrtPort= 0
deviceName=LPT1
CommAddress=0x318
CommVector=0x0C
FIFODepth=16

PrtPort= PrtPort specifies the printer port to use; 0=LPT1, 1=LPT2, 2=LPT3.

This option must match the options set in the CONFIG.SYS file and the

WIN.INI file (above).
deviceName= name of printer device to output to (LPT1, LPT2, or LPT3).
ComAddress= Communications port address.
ComVector= Communications IRQ vector.
FIFODepth= Determines FIFO usage on UART.

The NPCP printer driver uses COM1 communication hardware directly.  The

COM1 hardware is initialized and the external RSĆ232 driver hardware is powĆ

ered on, thus allowing the driver a free and clean" data path to the printer.

This makes it necessary to be careful when sharing the COM1 hardware with

any other driver.  Currently, there is no method of arbitrating COM1 access, so

drivers must be enabled and disabled only when they are needed.  This means

that printing in the background and trying to use another driver that talks to

the COM1 hardware causes undetermined problems.