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PK-232 TECHNICAL MANUAL
In Raw HDLC, data is sent from the computer to the PK-232 using a CTL byte of $20 (data
to channel 0); received data from the PK-232 uses $3F (monitored data).
Very little error checking is done in the RAWHDLC mode. Do not send commands such as
CONNECT and DISCONNECT that could possible create problems. Assume that all frames
are being sent in the UNPROTO state.
Enter Raw HDLC from the human or verbose mode by typing the following commands and
parameter values:
AWLEN 8
PARITY 0
RESTART
TRACE OFF
CONMODE TRANS
HID OFF
BEACON EVERY 0
PACKET
RAWHDLC ON
KISS OFF
HOST ON
From the Host mode, send the Host mode equivalents.
For details on implementing AX.25, see the "AX.25 Link Layer Protocol" document, available
from the ARRL Publications Department foe $10.
4.7
"KISS" TNC Asynchronous Packet Protocol
The PK-232 provides a simple, asynchronous, computer-to-TNC protocol for a Raw HDLC or
"KISS" TNC developed by Phil Karn, KA9Q. The computer must again provide all AX.25
headers and timing functions. KISS protocol is similar to the Raw HDLC protocol described
earlier, with a few exception:
o
The frame delimiter characters.
o
The commands available.
o
The method of determining the proper time to transmit.
o
The KISS protocol does not use the Host mode [SOH CTL ... ETB] described earlier.
Host mode commands and responses described before this KISS section do not ap-
ply when KISS is active.
4.7.1
Starting "KISS" TNC Operation
Before entering the KISS mode, set the PK-232 for hardware flow control on the host side
of the RS-232 link.
Type the following parameter values from the human or verbose mode:
PK232TM Rev. A 5/87
CHAPTER 4 – HOST MODE AND SPECIAL APPLICATIONS
4-10
Page 27
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