16 bit Assembly

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My Compiler

My compiler is written in MS C++ and is specifally 16bit only, although I can use the 32bit register names they are always treated as 16bit.

A quick overview

When compiling it undertakes:

• A basic syntax check
• Verifies the Commands entered
• Checks the existance of any Sub Routines
• Reports any errors it finds in the status window

If no errors are found it starts compiling making two passes of the Code.
The first pass:

• Checks the syntax
• Calculates the EXE size and prepares the Code
• Verifies the Sub Routines and records their location in the code
• Updates the Sub Routine list if new routines are found

The second pass is mainly concerned with insertion of the Sub Routine addresses.

On completion of the the Compiled EXE it is saved with a number of additional files:

• A stage backup copy of the ASM code file
• A debug file, that can used to check jumps and other addressng issues.
• A list of all Sub Routine in the ASM code file, with the Address location in the EXE.

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Last Update 27/12/2022