Download Software-User-Manual

CONNECTION TO THE COMPUTER
See the hardware manual, which describes how to connect the TNC3 to your computer. There are different cables necessary for TNC3 and TNC31, but they use all the RS232 interface of your computer.
Default settings
When starting with a new TNC3/31, the following settings are valid:
Baudrate:
Parity:
Bits/Character:
Xon/Xoff, Protocol:
RTS/CTS Handshake:
Stopbits:
DIP-Switch (TNC3S):
RS232-Configuration (DIP1.scr)
Autostart-Software (DIP1.scr):
N
19200
(none)
8
off
off
1
DIP1
19200 1 no
TNC3BOXD.apl
How to set these parameters at the PC depends on the software which runs on the PC. In most cases,
the parameters are defined in a configuration file and set automatically when the program starts. The
TNC3S has three DIP-switches on the rear, where you may set the RS232-baudrate. (See the information in the hardware-manuals of TNC3 and TNC31.
INSTALLING A NEW UPDATE
Here we explain how new programs are installed on TNC3.
Copying new Programs into Flash-EPROM
The operating system 3.0 or later is required. If your operating system is before 3.0, you have to update it
first. If the TNC does not start in operating-system mode because (e.g. with TNC31) a packet-radio
program is started automatically at power-on, you have to stop this program firs (e.g. by executing ESC
QUIT).
Basics:
The operating system of TNC3 is stored in a flash-EPROM.
The flash-EPROM's can be used exactly as the known UV-EPROM's, but the difference is that they can
be erased electrically. You can erase only complete blocks. The memory is subdivided in 8 blocks. The
erase process needs some seconds, writing the block needs about the same time.
The TNC3 operating system occupies approx. 32 Kbytes memory-space in flash-EPROM. With TNC3
(two Flash-EPROM's with 8x 16 Kbytes blocks each), the operating system is written to block 0 of both
flashs. The TNC31S with one 128 Kbytes (8 blocks, 16 Kbytes each) uses block 0 and 1 of the flash,
TNC31SX with 512 Kbytes (8 blocks 64 k each) uses only block 0 of flash-EPROM.
The memory blocks in which the operating system is stored, can be erased only by a special command.
When you write unsuitable data into flash, the operating system will be not affected. So, it is make sure
that the TNC always responds and that you can attempt to load the programs again.
TNC3-G-Software
Page 5