Search found 299 matches

by McKlaud
Sat Mar 06, 2021 4:56 pm
Forum: Software
Topic: PT3 Player for ZX81 with ZXPand+
Replies: 6
Views: 267

Re: PT3 Player for ZX81 with ZXPand+

Nice and looking very good!
by McKlaud
Sat Feb 27, 2021 7:30 am
Forum: Hardware
Topic: TC 2068 weird colors
Replies: 4
Views: 438

Re: TC 2068 weird colors

Hi, Nice board and all IC's socked. Anyway, when you finish re-cap, all colours should be back to normal. If not, check continuity of traces between the SCLD (ULA) and 22uF capacitors and between these capacitors and the PAL encoder (MC1377 type) inputs. I would suggest cleaning both RCA connectors ...
by McKlaud
Wed Feb 17, 2021 8:39 am
Forum: Hardware
Topic: ZX Nuvo 48
Replies: 4
Views: 274

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: 3624

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: 927

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: 927

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: 804

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: 622

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: 2019

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.