One of the first things I am writing for my 6800 machine is a S-Record loading routine. I need something (a register pherhaps) to store the origion of the S-Record. All my registers will be used (AA, AB, X) , and it would get confusing to save the origion on the stack, because I will have to pop it a good amount of times to acess it. Is there something else I can do to solve this problem

James_Parsons:

Like the 6502, the 6800 does not have a lot of registers. Thus, you will need to define a small number of memory locations to hold the working store of your program. Ideally, you will keep most of the important values in processor registers since accessing them is much faster. However, in the case of the 6800, you will need to use memory for holding your "variables", and reserve the processor registers for loops, pointers, etc.