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HAM Radio 3.2
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Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
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ares3-89
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pk87ded.doc
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1992-08-30
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AX.25 Version 2
Multi-channel
TNC FIRMWARE
(version 2.1)
Copyright 1987, Ronald E. Raikes (WA8DED)
This firmware is identical to the TNC-2 version, with the
exception of an added 'B' command to display and change the HDLC
and RS-232 baud rates. The default HDLC baud rate is 1200, while
the default RS-232 baud rate is 9600. The 'B' command expects a
parameter consisting of one or two digits: the first represents
the HDLC baud rate and the second (if present) respresents the
RS-232 baud rate. The digits used to represent baud rates are:
DIGIT BAUD RATE
----- ---------
0 no change
1 300
2 1200
3 9600
After changing the baud rate parameter with the 'B' command, the
new baud rate(s) will become effective on the next power up. The
'B' command is actually present in the TNC-2 version, but has no
effect on tnc operation.
Two versions of firmware are supplied for the PK-87: one
configured for use with 16K of RAM, the other configured for use
with 32K of RAM. The 16K version assumes a standard cpu clock
speed of 2.4576 Mhz, while the 32K version assumes a cpu clock
speed of 4.9152 Mhz.