First bit of assembler

Standard
Z80 architecture

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According to my diary for 22 March 1981 – this is the first piece of working assembler (actually it was Z80 machine code as there was no assembler program) I wrote:

LD IX(400Ch)
INC IX
LD HL, 402Bh
LD B, 0Ah
LD A (HL)
LD (IX + 0), A
INC HL
INC IX
DJNZ
RET

I think it became part of a bigger “Hexmon” program to display chunks of internal memory on screen.

2 thoughts on “First bit of assembler

  1. That triggered a flashback. I played with Z80 machine code once upon a time (can’t recall the machine, but it might have been a Heathkit), and I recognize the commands in your fragment. Seems to me that I used an assembler program, but maybe not until I graduated from the Z80 to an 8086 chip (woo-hoo, the big time!).

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