How do I write letter-initiated hexadecimal numbers in masm code?

Question

I am currently editing several macros consisting of MASM code. They all look similar to this:

Primary MACRO
Key 0Bh,\'0\'
Key 29h,15h
Key 03h,\'2\'
Key 06h,\'5\'         


        

Answer 1

The correct format for hex AB is 0ABh.

The reason you need to start it with a digit is so the assembler can easily distinguish it from a label or symbol such as ABh.

And don't worry about the fact it has three digits. It doesn't magically turn into a twelve-bit number because of that, the number of bits used will depend on the addressing modes you're using.