It's impossible to program assembly on the calculator, unless you know the actual hex values, like me. Here's a program for you:
:AsmPrgm
:EF4045210000
:24B344224C84
:21A89DEF0A45
:C9--------00
Put any hex values between the C9 and the 00. Experiment
Just don't put 00 because that exits the program. Try C91122334400.
Then run your program with Asm(PrgmNAME)
AsmPrgm can be found in your catalouge
Also, if you mess up any one of those numbers, it will clear your RAM.
Fun fact: with the APP MirageOS you can permenantly destroy any calculator.
Also, if you press [MODE] [ALPHA] [S] and your version is 1.13, please resond at once so that I can show you fun things to do with a bug in the OS.