Specifications

245
OPARAM Programming/TNPP Networking Using Version 8TNPP8C3
mm Link operation mode for the port.
00 not configured
01 Simplex In (Satellite)
02 Simplex Out (Reserved, not supported)
03 Full Duplex (normal TNPP)
04 Blind Duplex (not recommended)
bb Baud Rate for the port.
00 300
01 1200 this is standard for duplex
02 9600
03 150
04 600
05 2400
06 4800
oo oo Two byte field for a variety of options. These are a set of bit
values ORed together.
0010 BAD_PORT - treatment of “don't accept” packets.
<ACK> “don't accept” packets received at ports
not intended to receive some node ID.
If this bit is zero such packets will get <CAN> as a
response.
0020 BAD_BLOCK - treatment of unknown block
types. <ACK> packets containing unknown TNPP
block types, otherwise <CAN> such packets.
0040 DO_CR - condition link for switched packet net. If
set the port will send a <CR> after ever packet,
packet response <ACK>, <NAK>, <CAN>, <RS>,
or link test character <ENQ> <EOT>.
0080 END_ETB - last block in a packet formatting. If set
end the last block in a packet with <ETB><ETX>,
otherwise end it with just <ETX>.
0100 GATEWAY - handle Gateway Box type of
blocking. Watch for multi-block packets where the
<ETB> after each block has been “escaped” to
<SUB>W. This is the setting for connecting to a
“Gateway” box.
0200 BUFFERBOX - does not decrement inertia count;
for pass-through buffering or multiple TNPP cards
(8c0)