opcode question

[MajorDill]

When I code :   ADD    BX,10h
and compile, I get :    81 C3 10 00   (as viewed in debug)

What do I need to code to get:    83 C3 10

Thank-you

[Frank Kotler]

If you really care what the opcodes are:

Code: [Select]

db 83h, 0C3h, 10h

Or, if you semi-care:

Code: [Select]

add bx, byte 10h

Or, if you just want it short:

Code: [Select]

add bx, 10h

... just like you've got, and give Nasm the "-O" switch - there is little point to using anything but "-Ox".

Best,
Frank

[MajorDill]

byte worked great!
thanks