Z80 For Loop

WHILE - FOR:

We usually use B as counter. The main trick here is that DJNZ decrements the counter in B and then checks, so that you don’t need to do two operations.

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LD C, 5
LD A, 0
LD B, 100

.NEXT2:
push BC
LD B, 10
  
.NEXT:
ADD A, C
DJNZ .NEXT
pop BC
      
DJNZ .NEXT2