README.bootloader

There is a boot loader for the nano80. This lets you
upload large files in Intel .hex format from a remote
computer to the nano80.

The proceedure is as follows:

Assemble your source code program. Using the included
assembler asm80:

asm80 cylon.asm

The output will be 2 files:
cylon.prn	assembled output suitable for printing
cylon.com	binary files in CP/M .com format

Now use the ihex program to convert the .com file to 
Intel .hex format:
ihex cylon.com

The output will be cylon.hex and look like the following:
:10000000314E00AFD3003CD30007D300CD2200FE19
:1000100080C209000FD300CD2200FE01C21400C32C
:1000200009000120010DC2250005C22500C90000FC
:1000300000000000000000000000000000000000C0
:0F004000000000000000000000000000000000B1
:00000001FF

This is an ascii file that we will upload to the nano80.

Connect your serial cable between the nano80 and
your computer. Place the nono80 in run mode (RUN/HALT
switch in RUN position).

Now press and hold the LOAD button while momentaraly
pressing the nano80 reset switch (NOT the arduino reset 
button). 

The LCD display will show 'booting'

Now on your computer, run
upload cylon.hex

The LED's will flash on the nano80 and when the data 
is done uploading the last address used will be displayed
on the LCD display. Then the word 'Done' will be displayed
for a second and the nano80 will start running your just
uploaded program.

NOTE:

Because of the way the arduino uploads code, when starting your 
upload, the arduino may reset. It WILL reset the first time you
upload your code using 'upload' and the first time you use a terminal
program to talk to the serial port because of the way the 
arduino senses the DTR line.

If this happens, just restart the boot load process and 
it will run just fine. There are ways to stop this, but
they involve butchering your arduino nano. 

Your choice.