Search found 34 matches

by dat-alex
Wed Dec 05, 2018 12:34 pm
Forum: Hardware
Topic: [MZ-80 K] Serial interface through I/O ports $F8-$FF
Replies: 9
Views: 10824

Re: [MZ-80 K] Serial interface through I/O ports $F8-$FF

I had been informed about this decoding scheme but with your clear explanation I finally understand it. Thank you. But , as I want to use only expansion port without the need of soldering inside I can use the MREQ with the following address decoding acording the new schematic below: mz-serial_MREQ.j...
by dat-alex
Wed Dec 05, 2018 6:43 am
Forum: Hardware
Topic: [MZ-80 K] Serial interface through I/O ports $F8-$FF
Replies: 9
Views: 10824

Re: [MZ-80 K] Serial interface through I/O ports $F8-$FF

Thank you hlide for your quick response. A detailed i/o map usage and memory map would be usefull . I have not find a complete list yet. About my experiment: I understand that you can only access IORQ trough IN & OUT commands only not with POKE & PEEK. As I would also prefer to access serial...
by dat-alex
Tue Dec 04, 2018 12:01 pm
Forum: Hardware
Topic: [MZ-80 K] Serial interface through I/O ports $F8-$FF
Replies: 9
Views: 10824

[MZ-80 K] Serial interface through I/O ports $F8-$FF

Hi to all you out there! I have a question about MZ I/O address range: I want to experiment with a DIY serial interface using 167c550 for MZ80K. I have examined carefully the MZ80k service manual and designed the folloing schematic : schema.jpg ΝΟΤΕ: this circuit HAS NOT been tested yet! My question...
by dat-alex
Tue Dec 04, 2018 11:40 am
Forum: Off-topic
Topic: Introduction
Replies: 59
Views: 72316

Re: Introduction

Hello

-male
-1969
-Greece

my first computer was (is) Commdore 64
recentrly bacame a proud owner of an MZ80K and trying all kind of DIY projects with it!