Search found 295 matches

by McKlaud
Fri Jan 08, 2021 9:10 am
Forum: Hardware
Topic: ZX Nuvo 48 Help
Replies: 8
Views: 657

Re: ZX Nuvo 48 Help

Happy 2021,

Where are you based?
by McKlaud
Sat Dec 19, 2020 10:24 pm
Forum: Hardware
Topic: ZX Nuvo 48 Help
Replies: 8
Views: 657

Re: ZX Nuvo 48 Help

Hi, Are able to solder missing components? Do you have any experience with reading circuit diagrams? Do you have basic tools like a multimeter? If you need any documentation you can contact @superfo, and he is registered on this forum. Don designed this board and he will be able to give you a hand. ...
by McKlaud
Fri Dec 18, 2020 2:06 pm
Forum: Sinclair Misc
Topic: Quirky nerdy hardware quiz time
Replies: 9
Views: 585

Re: Quirky nerdy hardware quiz time

1. 5 but if ULA is 5C112 or later type + 1. 3. 8x5 4. ZX Spectrum 128K +2 (with Issue 3 motherboard) 5. Combined Cycle Gas Turbine 7. ZX81 Issue 2 does not exist in the wild 8. ACIS chips in Enterprise 128K 10. 1.4A @ 9Vdc = 12.6W 11. Light-Emitting Diode ; blue LED Vf is in range between 2.5V to 3....
by McKlaud
Wed Dec 16, 2020 9:31 am
Forum: Software
Topic: ZX81 Demos 2020
Replies: 0
Views: 179

ZX81 Demos 2020

Four brand new and fresh demos for Zeddy presented last night: https://www.youtube.com/playlist?list=P ... v6o0LV46a7

.p files will available for download at https://www.pouet.net soon.
by McKlaud
Fri Oct 23, 2020 2:09 pm
Forum: Hardware
Topic: Spectrum +3 Keyboard issues
Replies: 7
Views: 1866

Re: Spectrum +3 Keyboard issues

Have a look around 40077 chip (ULA). I would not be surprised if some of soldering joints are cracked. It might be a good idea to re-flow the chip.
by McKlaud
Thu Oct 22, 2020 10:49 pm
Forum: SALES
Topic: Lambda 8300 on eBay
Replies: 5
Views: 3279

Re: Lambda 8300 on eBay

Thanks for info, but postage limited to Germany only.
by McKlaud
Tue Sep 29, 2020 12:58 pm
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 123
Views: 72839

Re: Jupiter ACE (again)

Hi Andy,

It is a very good idea :) I've got a silly question. All buffered lines have pull-ups. Do you want to keep them HIGH when they are nor used? In my understanding they should be LOW if they are not used/active.
by McKlaud
Mon Sep 28, 2020 7:37 am
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 123
Views: 72839

Re: Jupiter ACE (again)

I have never tried to load any WAV files, only TAPs from JAA websites. If you have TZXduino I could share a few files that works and you try with them.

Bear in mind that Jupiter ACE TZX files should be converted to ZX Spectrum timings if you would like to use a bulk standard TZXduino firmware.
by McKlaud
Sun Sep 27, 2020 6:26 pm
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 123
Views: 72839

Re: Jupiter ACE (again)

Pin 13 of Z14 is directly connected to the data line D5 and you can see all data flowing there. Take pin 13 of Z14 out of the socket and then see what you have there during the LOAD execution. If you would like to separate LOAD signal only, the oscilloscope should be triggered by the 0xFE read pulses.