Search found 337 matches

by McKlaud
Wed Feb 17, 2021 8:39 am
Forum: Hardware
Topic: ZX Nuvo 48
Replies: 4
Views: 1615

Re: ZX Nuvo 48

Hi, you are after two parts of Altera/Intel Windows based software : 1/ Quartus II 13.0sp1 2/ MAX7000 library BUT, if the Altera that you have there is from one of cheap sources in China I would not be surprised if the JTAG is locked out and you would not be able to re-programme the chip with Altera...
by McKlaud
Tue Feb 02, 2021 8:59 am
Forum: Hardware
Topic: CZ1500 ( TS1500 ) composite video mod done
Replies: 8
Views: 6249

Re: CZ1500 ( TS1500 ) composite video mod done

Hi All,

Please accept my apology in regards of my JA Video Buffer board. I've never claimed that the circuit's design was mine. I did the PCB layout and clearly stated on the schematic diagram who should get credits for it.
by McKlaud
Fri Jan 08, 2021 9:10 am
Forum: Hardware
Topic: ZX Nuvo 48 Help
Replies: 8
Views: 3520

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: 3520

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: 3331

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: 1865

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: 4707

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: 11
Views: 10119

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: 105403

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.