piclist 2017\09\23\205959a >
Thread: Lost Souls
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picon face BY : David Strumpf email (remove spam text)



And then there was CP/M for 8080 and Z80.  Oh, the good days...

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-----Original Message-----
From: smplx <STOPspamsmplxKILLspamspamallotrope.net>
To: Microcontroller discussion list - Public. <spamBeGonepiclistspammit.edu>
Sent: Sat, Sep 23, 2017 07:57 PM
Subject: Re: [PIC] Lost Souls




On Sun, 24 Sep 2017, RussellMc wrote:

> I still remember quite a few of the MC6800 assembler mnemonics.
> Mental relative figuring would probably approach it's original ease fairly
> rapidly, I think/hope.
> 6800 family was a serendipitously good choice for raw machine language
> programming as the instructions group the operator and data bits far more
> logically for manual construction than does the 8080 family.

look at the 8080 opcodes again but in octal :-)

The Z80 opcodes were mostly 8080 with prefix opcodes that replaced HL with
IX or IY

Regards
Sergio Masci
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