Thanks for the clarification on the M/L monitors. I tend to use the assembler terms interchangeably.

For short and quick codes, I usually use "Monitor$C000" directly, since it assembles and runs on the spot. For longer ones, I use the full set...Editor64, Assembler 64, LoLoader64, and Monitor$C000 ...

To all,

Thank you for the informative information! I struggled with ASLA and ASL A, neither of which were recognized by the C64 Macro Assembler Development System (CBM 1982).- MADS.

I did return to the simple ASL with no Operand, and it worked running Monitor$C000.

.A 033C LDA #$01
.A ASL
.A BRK ...

What is the operand for use with ASL when shifting bits in the accumulator?

The Programmers Reference Guide (CBM) shows "ASL A", but there seems to be no way to write the "A" which the C64 Assembler recognizes??

Any help would be appreciated!

Anthony G