program for max232
Hi!
Yes, you can protect your program with a fuse.
Again yes, you can change data in the PIC internal RAM or EPROM.
Is the "ComPort" the winsoft component?
If yes, congratulations! It is very easy to use.
Forget the PIC 16F84. Use 16F628 instead, it is better than 16F84.
You need to put the max232 to convert the RS232 levels to TTL levels at the PIC inputs.
It works fine, I never hear anyone talking about problem using it.
I can send a sample schematic for you.
Let me know more about your project to help better.
Best Regards.