Xmodem

[Alex Freed <alex_news@alexfreed.com>]

OK, as promised here is the source and the binary and even a .DO image 
with both binaries.

http://alexfreed.com/FPGApple/xmodem.zip

The (almost) original version xmod.a requires the transmitted file to 
have the destination address in the first 2 bytes. This works fine if 
you assemble the source say with ACME and set the output to "cbm" format 
that does exactly that - prepends the address in low endian format.

However to work with arbitrary raw binary files I made a new version - 
xmod1.a

This one asks for the destination address in hex. 4 digits expected, so 
to load to $800 enter "0800".

The SSC is expected to be in slot 2 and is not initialized, so the first 
time do "IN#2".

Have fun.

-Alex.