FIRST STEPS IN MACHINE CODE

An introduction to Z80 Machine Code
by David Nowotnik.

The BASIC programs used in this article are available in text form so that they can be typed into a Spectrum or Spectrum emulator.

 DOWNLOAD BASIC PROGRAMS TEXT FILE 

 Part 1: BASIC CONCEPTS 

 Part 2: WORKING WITH REGISTERS 

 Part 3: USING FLAGS 

 Part 4: BITS AND STACKS 

 Part 5: ROM ROUTINES 

 Part 6: INDEX REGISTERS, IN/OUT, INTERRUPTS 

From
ZX Computing 1985