Assembly code for eprom

/rom

Manual Steps

Compile

ca65 source.s

Link

ld65 -C mem.cfg source.o 

View content of the output

hexdump -C a.out 

Write to programmer

minipro -p AT28C256 -w a.out 

Make

Compile, link & view hexdump

make 

Compile, link & write to programmer

make write

to target a file other than main.s use...

make f=tests/1_basic.s 

make write f=tests/1_basic.s

/rom/tests - contains simple assembly programs that allow each part of the circuitry to be tested as it's being put together.

Ardiuno bus monitor

/src

Used to view the contents of the data & address buses along with the cpu r/w flag on each clock pulse.

RS232

minicom -b 19200 -D /dev/ttyUSB0 

or

screen /dev/ttyUSB0 19200

Links

Assembler / Linker - https://cc65.github.io

Rom Flash - https://gitlab.com/DavidGriffith/minipro