Live Coding in ASM80: run your assembly without leaving the editor
Here's a Z80 loop. Open ASM80, paste it in, and just watch.
; <LIVESTART maxT=500000>
; <SEED A=0x00, B=10, HL=0x4000>
loop:
add a, b
djnz loop ; <TRACE A, B>
blog.asm80.com10 min read