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1991-03-08
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NOS/BPQ Link - NODEDRV4.COM
The 'Packet Driver' I wrote to allow NOS to communicate with the switch
has been modified to use the BPQ Host mode interface. One copy of the
packet driver is needed for each radio port to be used by NOS, plus one
for the loopback port if you want NOS to be able to talk to the switch.
I dont have a lot of experience of using NOS, but I suggest that if you
are using TCP/IP over NETROM that you use the lookback port, and let the
switch handle all the radio links. Only if you are using IP in datagram
or ax.25 virtual circuit mode will you need to give NOS direct access to
the radio ports.
Please note that you need at least version 4.03 of BPQCODE.EXE
The following is an extract from my system. You will need to tailor
it to your own requirements.
If using Desqview, NODEDRV4 must be loaded in the same window as NOS -
if you put it under desqview the system will probably crash. It takes
three parameters, the software interrupt number used by NOS to communicate
with it (in the range 60-7f hex), the BPQ Host port to use to talk to the
switch (1 - 63), and the number of the radio port to be accessed.
Please note that NODEDRV4 reads BPQCFG.BIN to find what interrupt to use
to talk to the switch. BPQCFG.BIN must therefore be in the current directory
when NODEDRV4 is loaded.
STARTNOS.BAT
nodedrv4 0x61 33 1 I am using BPQHost ports 33-35, as I use
nodedrv4 0x62 34 2 the first 32 for a PacketCluster Node.
nodedrv4 0x63 35 3 I have given NOS access to 2 radio ports,
nos and a loopback port to the switch.
This is the 'attach' bit of AUTOEXEC.NET. I can't see where the parameter
following the interface name is used, but the code suggests it is the
maximum length of the transmit queue. The next param is the MTU.
#
attach packet 61 ax1 5 256 Radio Port 1
attach packet 62 ax2 5 256 Radio Port 2
attach packet 63 node 5 236 Loopback link to the switch
#
This is a new facility, and there is very little local IP activity for
me to try it with. Any feedback would be most welcome, both on problems
and suggestions on how best to set up the system.
73,
John Wiseman, G8BPQ
76, Haywood Road,
Mapperley,
Nottingham.
NG3 6AE
6th June, 1990
Revised 7 March 91.