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The Structure of I-Code

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The 'I' in I-Code stands for Intermediate. Intermediate code is code that is a step between interpreted source statements and fully compiled machine code. Typically, intermediate code uses tokens to represent the instructions to be executed. Basic09 I-Code goes a step further by re-arranging the source code instructions in post-fix notation (also known as Reverse Polish Notation) order.

The tokens used by Basic09 are a single byte ranging from $00 to $FF. See I-Code Token List

Terms Used

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1. The terms Vector, Table and Matrix, as used to describe the arrays, is defined in the Microware OS-9 Basic User Manual (for OS-9/68000, (c)1991), Chapter 3: Program Construction: Complex Data Types and Subroutines on page 3-1.

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