Search found 520 matches

by hlide
Wed Apr 21, 2021 12:47 am
Forum: Demoscene
Topic: Futuro MZ by Genesis Project
Replies: 14
Views: 1722

Re: Futuro MZ by Genesis Project

The /WAIT facility is for any device which needs to supply it and it is a common Z80 signal: for instance, when you plug you own PCB in the expansion bus (/EXWAIT signal) and want to make the CPU able to adjust to slow chips (/EXWAIT signal is connected to Z80 /WAIT signal). MZ-80 K has no LSI to ha...
by hlide
Sun Apr 18, 2021 10:19 am
Forum: Hardware
Topic: MZ-80A RFS Board / MZ-700 tranzputer Board
Replies: 2
Views: 83

Re: MZ-80A RFS Board / MZ-700 tranzputer Board

I would be interested in MZ-80A upgrade board with a 40/80 columns card. Few years ago, I acquired an ill-working MZ-80A with 40/80 modding but I may restore it in its original hardware as it is not stable.

MZ-2500 in the FPGA emulator will be the summum as I think it is the last of the B series.
by hlide
Fri Apr 16, 2021 6:33 pm
Forum: Demoscene
Topic: Futuro MZ by Genesis Project
Replies: 14
Views: 1722

Re: Futuro MZ by Genesis Project

Also, the snow effects on MZ-80 K is merely due the fact that Z80 is reading/writing in VRAM while video circuit is reading bytes from VRAM precisely because there is no setting /WAIT to 0 when drawing during horizontal rasterline.
by hlide
Fri Apr 16, 2021 6:02 pm
Forum: Demoscene
Topic: Futuro MZ by Genesis Project
Replies: 14
Views: 1722

Re: Futuro MZ by Genesis Project

yes, it looks MZ-80 A has a similar scheme but I didn't see it clearly in the service manual. If true, MZ-80 A may benefit of the same tricks to make fast display.
by hlide
Thu Apr 15, 2021 6:43 pm
Forum: Demoscene
Topic: Futuro MZ by Genesis Project
Replies: 14
Views: 1722

Re: Futuro MZ by Genesis Project

When Z80 tries to access memory or I/O port, there is a moment when you drive a chip to read/write a byte, you need the Z80 to be paused because that chip may need more time to handle the operation. For that purpose, a chip may set the Z80 /WAIT input pin to make the Z80 inserting more cycles (idlin...
by hlide
Sun Apr 11, 2021 12:48 pm
Forum: Games
Topic: Beyond
Replies: 23
Views: 3762

Re: Beyond

Ah quand même !
by hlide
Sun Apr 11, 2021 12:43 pm
Forum: Demoscene
Topic: Futuro MZ by Genesis Project
Replies: 14
Views: 1722

Re: Futuro MZ by Genesis Project

You need my PAL version of EmuZ-700 (https://github.com/SHARPENTIERS/EmuZ-700-1500/releases) or the last version of mz800emu. The video timing was problematic on every emulator because they were not respectful about the wait states cycles accuracy that demo demands.
by hlide
Sun Mar 28, 2021 9:43 am
Forum: Buy/sell
Topic: MZ-5600 for sale
Replies: 2
Views: 241

Re: MZ-5600 for sale

Ah là là, je n'ai vraiment pas de place pours ces mastodontes :(.
by hlide
Mon Mar 22, 2021 10:30 pm
Forum: Hardware
Topic: MZ80K keytops
Replies: 6
Views: 1135

Re: MZ80K keytops

You mean the stickers were not over the plastic but under? I had once tried to find but the only one I could find was Japanese.
by hlide
Mon Mar 22, 2021 10:25 pm
Forum: Other
Topic: JAPANESE DISPLAY CG-ROM
Replies: 1
Views: 264

Re: JAPANESE DISPLAY CG-ROM

They are phoneme alphabets : katakana in the first set and hiragana in the second set from columns 8 to B and their ponctuations. I believe there are some kanji symbols in column B. For instance "2020年03月22日". 年 (nen), 月 (gatsu) and 日 (nichi) respectively meaning “year”, “month” et “day”.