How it All Starts
Execution will begin with the first line of code
in the assembler file you produce. When this line is executed, the
stack pointer will be set but no register will be pre-loaded with the
address of the global variable area. To make it possible for you to
load this value into a register (probably A5), the assembler puts the
address of the first unused word in memory (the word after the last
instruction in your code) in word 1 of memory. Thus, the instruction
MOVE 1,A5
is probably the first line of code your compiler should output on any
input program.
Computer Science 434
Department of Computer Science
Williams College
