Search found 337 matches

by McKlaud
Tue Apr 25, 2023 8:19 am
Forum: Hardware
Topic: 128k 6U sound issue
Replies: 1
Views: 1240

Re: 128k 6U sound issue

Check if 1.79MHz clock coming to the PSG.
by McKlaud
Sat Apr 08, 2023 8:08 pm
Forum: Z88
Topic: Diagram for making your own cartridges?
Replies: 15
Views: 14392

Re: Diagram for making your own cartridges?

Well done!
by McKlaud
Wed Feb 22, 2023 11:57 am
Forum: Hardware
Topic: Romantic Robot Videoface Digitiser (clone)
Replies: 5
Views: 1851

Re: Romantic Robot Videoface Digitiser (clone)

Hi,

Have a look at my GitHub here: https://github.com/McKlaud76/VideoFace

I have got some spare PCBs. So if you are interested, feel free and send me a PM.

Cheers,
by McKlaud
Fri Feb 17, 2023 8:11 am
Forum: Development
Topic: ZX81 audio.
Replies: 31
Views: 4308

Re: ZX81 audio.

It might be an overkill but AD makes/made some interesting D-A converters like: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7228a.pdf or https://www.analog.com/media/en/technical-documentation/data-sheets/AD7801.pdf The second one might be an alternative to the ancient ZN42...
by McKlaud
Wed Dec 07, 2022 7:08 am
Forum: Hardware
Topic: zx spectrum omni
Replies: 2
Views: 1518

Re: zx spectrum omni

And a pinch of salt:

https://www-speccy-pl.translate.goog/fo ... p#msg69632

I have got also the newest Issue 4 but just the board. I can say that the assemble quality improved.
by McKlaud
Wed Dec 07, 2022 6:59 am
Forum: Hardware
Topic: ¿A Jupiter Ace clone kickstarter?
Replies: 6
Views: 3083

Re: ¿A Jupiter Ace clone kickstarter?

@wilco2009: nice one and replied to your queries in the survey.
by McKlaud
Fri Sep 30, 2022 9:45 pm
Forum: Hardware
Topic: ZX81 kit assembly
Replies: 28
Views: 15213

Re: ZX81 kit assembly

Lardo Boffin wrote: Fri Sep 30, 2022 9:40 pm I only bought three this time!
But please be precise, the quantity was "fully loaded three 40-foot shipping containers" :mrgreen:
by McKlaud
Wed Sep 21, 2022 2:58 pm
Forum: Hardware
Topic: Romantic Robot Videoface Digitiser (clone)
Replies: 5
Views: 1851

Romantic Robot Videoface Digitiser (clone)

Hi All, Just wanted to let you know that completed testing my clone of Romantic Robot Videoface Digitiser for ZX Spectrum. It works as it should, can capture PAL or SECAM composite signals and can save up to 6 capture screens on tape, microdrive or disk. Interesting toy and ti was a fun with recreat...
by McKlaud
Thu Jul 14, 2022 3:47 pm
Forum: Hardware
Topic: Timex 2048 only 16k
Replies: 49
Views: 10005

Re: Timex 2048 only 16k

This is the Timex 2068 'homebrew' ic kit I saw, but it doesn't bear any resemblance to the Timmy project and I couldn't find out any details about which PCB it uses; https://www.ebay.com/itm/114968713354?hash=item1ac4ab588a:g:musAAOSwjZ9hMif~ The seller offers in the kit: Z80 CPU .....DIP40....2pcs...
by McKlaud
Thu Jul 14, 2022 6:38 am
Forum: Hardware
Topic: Timex 2048 only 16k
Replies: 49
Views: 10005

Re: Timex 2048 only 16k

All DRAM used in any TC2048 or TC2068 is a single voltage and 4-bit type. TC2048 with PCB rev 5 can have the upper RAM built in two variants: 1. 4416 DRAM x 4 chips = 2 x 16K 2. 4464/41464 DRAM x 2 chips = 1 x 64K On the rev 5 board there are places for additional two diodes and resistor forming OR ...