The intent is to have a number of links to useful articles on using the HP65 emulator.

But I’m not there yet.

The most useful tips I can provide for now are:
1. Press the display to get a menu of options
2. You can remove a loaded program card by switching the calculator off and on again
3. Make sure you understand Reverse Polish Notation (RPN)
4. Help for the HP21 is a good primer.

Here’s what I have so far:
The HP65 Emulator Menu
Saving Magnetic Cards
HP65 Manual
Credits
Disclaimer

There’s also:
HP-65 Program Codes
HP-65 Internals Reference
HP-65 Internals Articles
The HP-65 calculator main page