My Assembly Notes

I can help a little here:

JSR - Jump to Subroutine - uses the opcode "20", used to "jump" to any address in the same bank. Two bytes needed. Once the jump is done and the code is executed, a "RTS" (return from subroutine) is needed - opcode is "60".

Example: 20 63 53 - go to address 5363.

JSL - Jump to Subroutine LONG - uses the opcode "22". Can jump to any address in the ROM. After jumping and executing the code, needs a "6B" opcode to return.

Example: 22 63 53 C2 - go to address C2/5363.

JMP - "Jump", opcode "4C". I believe you cannot jump to other banks using this command.

Example: 4C 93 22 - go to address 2293.

ASL - opcode "0A", used as arithmetic to multiply a number by power of two each time it's called.

Example: to multiply a variable by 16, you would need to use 4 consecutive 0A commands.