SECTION 5
Communications and Device Support
5-4 PEN*KEY
R
6100 Computer Programmer’s Reference Guide
For NRInet, SERVICES must contain a protocol entry for nrinet" with a
protocol type of tcp." For example:
nrinet 44965/tcp #Norand Inet File Transfer
The fields domain" and domainĆnameĆserver" are not required if the host is
specified by IP address rather than domain name. Also, the fields that specify IP
addresses (nnn.nnn.nnn.nnn) and the domain" field can be omitted if
BOOTP.EXE or DHCP.EXE loads the information from a BOOTP server or a
DHCP server.
Set the environment variable PCTCP to the path of PCTCP.INI. For example, in
AUTOEXEC.BAT:
SET PCTCP=C:\PCTCP.INI
Some computers support two network interfaces for NRInet: Ethernet and
RSĆ485. The network interface is selected in a menu in Norand Utilities during
the IPL sequence. This setting is stored on the RAM drive so it disappears any
time the RAM drive is removed or formatted. For example, applications that
boot from a PC Card often format the RAM drive before installing the
application. In these cases, you must return to the Norand Utilities menu to
reselect the setting in order for NRInet sessions to work correctly.
When the RSĆ485 network interface is used on a computer with an Ethernet
network interface, PSROM0C.EXE powers off the the Ethernet adapter. If the
application uses the Ethernet adapter outside of PSROM0C.EXE, it is
recommended to unload the Ethernet drivers before calling PSROM0C.EXE,
then reload them afterwards.
TCOM Session Overview
Under the NORAND standard file transfer session, the HHC always uploads
first. Once all upload files are sent, the line is turned around and the host then
sends any download files. Each file is preceded by a header record that gives the
receiving computer information about the format used by the file.
The HHC must first send a session control file, which identifies the HHC to the
host computer. The HHC may then send a download request file. This optional
file prepares the host computer to download one or more files to the HHC.
Upload files can then be sent to the host.
Session Control File
To identify itself to the host, the HHC sends the session control file at the
beginning of a TCOM session. The applicationĆdependent HHC ID is used by the
host to determine which files to downloading to the HHC. The format of the
session control file is as follows:
<DSCNTRL00001Xnnn>PPPPPPPPPPPPPPTTTTTTTTTTTTTTTTYYMMDDHHMMSS . . .
where:
< = beginning of file header
D = file type (fixed)
SCNTRL = file name (fixed)
00001 = decimal number of records in file (fixed)
X = data type (ignored by host)
nnn = decimal number of bytes in file record
> = end of file header
PPPPPPPPPPPPPP = program identification
TTTTTTTTTTTTTTTT = hand-held computer ID (determined by application)
YYMMDD = date
HHMMSS = time
. . . = additional HHC information
5. Communications
and Device Support
Summary of Contents for PEN*KEY 6100
Page 1: ...PEN KEYR 6100 Computer PROGRAMMER S REFERENCE GUIDE P N 977 054 001 Revision B December 2000 ...
Page 14: ...CONTENTS xii PEN KEYR 6100 Computer Programmer s Reference Guide ...
Page 22: ...Preface 8 PEN KEYR 6100 Computer Programmer s Reference Guide PREFACE ...
Page 318: ...GENERAL INDEX Index 6 PEN KEYR 6100 Computer Programmer s Reference Guide ...
