Changes
/* What assembly is */Fixed typo.
# CPC specifics (memory map, firmware (i.e. OS) and hardware)
By saying "assembly", "assembler" or "asm" (for short) 1. and 2. get intermixed and sometimes confuse people. By saying "assembly" the connotations point more to the z80 assembly language (it's its commands, a.k.a. "mnemonics". This is source code.); this is a mirror of the z80 architecture as every mnemonic has a direct machine code equivalent (i.e. object code). "Assembler" is a term more properly used for a full-blown program that gets the work done of converting source code into machine code and adds its own made-up commands (which are words that look like z80 mnemonics, but are actually only offered for convenience by the assembler) or directives (words that set up and take care of various things) in the syntax for ease of programming. "asm" may mean both.
Also how a CPC does something, like printing a character on the screen depends on its firmware and hardware and how its memory is organized and used by the firmware, hardware and user-programs. The MSX has totally different hardware so here's where your code starts to differentiate. Since most of the asm code is general purpose, this is why Spectrum ports were so easy to make; just use different screen, sound and keyboard drivers and voila... Of course code that is specifically written for the CPC will take more advantage of its hardware (it will be less portable/general-purpose but the programme/game has the potential to run faster and have more features).
