LANGUAGE PROCESSING SYSTEM FOR CONVERTING A SOURCE PROGRAM INTO A COMPUTER EXECUTABLE MACHINE LANGUAGE

A language processing system for converting a source program described by a program language into a computer executable machine language for a computer system which has a data memory space divided into a plurality of banks. The system includes a bank information storage portion for storing information of the banks, a bank information setting portion for identifying the bank switching instruction and for storing a bank number designated by the bank switching instruction, a bank information discriminating portion for reading out the content of the bank information and making a comparison between the bank number identified by the content of the bank information storage portion and the bank number designated by an instruction statement when the statement is to operate with the content of the data memory, a bank switching instruction generating portion for generating a bank switching instruction to switch the bank number to the bank number designated by the instruction statement when an inconsistency between bank numbers is identified, and a converting portion for converting the statement of the source program and the generated bank switching instruction into machine language.