[Milsurplus] surplus SINCGARS???

[J. Forster]

The EPROMs in this are smaller. IMO, the complexity goes up as the square of the EPROM
size. Also, I use an interactive approach on the device under test as follows:

1. Make at least a partial schematic to ID the ports and other connected devices like
parameter switches.
2. Put a scope on any serial ports.
3. Hook up any input/output to the DUT (Device Under Test) (e.g. a terminal)
4. Have a PC with the disassembled code in a word processor to make notes
5. Use a logic analyzer with disassembly to watch the thing run. A Tek 7D01 has a
really useful 'map' feature that lets you watch where the things are running in
memory. What you usually see is a series of lines, each a subroutine.
6. Get a cup of coffee and a pile of goodies to eat.
7. Start the analyzers and boot the DUT and watch the boot routines and serial ports.
As you ID various subroutines, annotate on the PC.

It takes a while, but is not impossible by all means. BTW, hand written code is much
easier to take apart than machine assembled stuff, which is far more chopped up and
generally has shorter subroutines.

FWIW,
-John


Peter Gottlieb wrote:

> I found it to be a rather tedious job to disassemble code.  I did the 27256 in
> my RF-590A and it was a bear.
>
> Peter