This is what an 8086 assmebly language program looks like

.model small
.stack
.data
message db "Hello world, I'm learning Assembly !!!", "$"

.code

main proc ...

This is not machine code this is BIANRY it is what assembly code is turned into, you need to be looking at how to learn ASSEMBLY LANGUAGE.

This can be written using a simple text editor like...

Does anyone know if there is a way to connect a server which has previously been set up as a DOMAIN CONTROLLER, (by someone else) to an existing WORKGROUP of 3 or 4 PC's running XP.

DOMAIN...