What does pass one of sic assembler do?

Pass one of a SIC (Simplified Instructional Computer) assembler is responsible for reading the source code and creating a symbol table. During this pass, the assembler translates labels into memory addresses and determines the size of instructions and data. It does not generate machine code yet; instead, it lays the groundwork for pass two, where the actual machine code is produced. Essentially, pass one establishes the structure and organization needed for the final assembly.