Search found 12 matches

by shadow338
Sat Sep 18, 2021 8:15 pm
Forum: Hardware
Topic: Harlequin 128K 2D not showing any video signal
Replies: 4
Views: 1868

Re: Harlequin 128K 2D not showing any video signal

It was a dry pin on U24. After soldering it the computer started working. Thanks!
by shadow338
Fri Sep 17, 2021 3:07 pm
Forum: Hardware
Topic: Harlequin 128K 2D not showing any video signal
Replies: 4
Views: 1868

Harlequin 128K 2D not showing any video signal

Hello, I built the 48K version a few years ago and it worked like a charm. Now it was time to build the 128K version but strange enough I get no video through the composite output. (I have no RGB cable to test). I checked the voltage of the Z80 and it looks fine (5v) but it seems more related to the...
by shadow338
Sat Jun 10, 2017 9:16 pm
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum Harlequin kit (48K). How to add AY-3-8912 ?
Replies: 6
Views: 14853

Re: ZX Spectrum Harlequin kit (48K). How to add AY-3-8912 ?

thanks superfo!

I was looking at the pdf provide and I have a few questions:

1 - is that Ok if we don't include the Kempson part of the circuit? (U5 + U6)

2 - How we hook up the AUDIO out of the AY to the harlequin original speaker or/and original EAR?


thanks!
by shadow338
Tue May 09, 2017 6:51 pm
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum Harlequin kit (48K). How to add AY-3-8912 ?
Replies: 6
Views: 14853

ZX Spectrum Harlequin kit (48K). How to add AY-3-8912 ?

Hello,

Can I use the following schematic (attachment) that was taken from the 128K ZX Spectrum Harlequin and adapt on the 48K version?Or do I need to pay attention to anything in special?

Thanks!
by shadow338
Tue May 24, 2016 8:26 pm
Forum: ZX Spectrum Lounge
Topic: zx harlequin + Interface 1bis = not working?
Replies: 1
Views: 2851

zx harlequin + Interface 1bis = not working?

hello, Did anyone had luck on getting these two to work together? I just got my Interface 1bis, but I'm wondering if the one I got is faulty or there is some incompatibility between harlequin and this interface. The 1bis turns ON but then when I run 'RUN' it does not show the menu that is suppose to...
by shadow338
Sat May 07, 2016 6:31 pm
Forum: ZX Spectrum Lounge
Topic: Harlequin video modifications
Replies: 40
Views: 41062

Re: Harlequin video modifications

just noticed that RGB != Component.

Not sure if there is any RGB to HDMI converter...
by shadow338
Sat May 07, 2016 6:26 pm
Forum: ZX Spectrum Lounge
Topic: Harlequin video modifications
Replies: 40
Views: 41062

Re: Harlequin video modifications

thanks PokeMon, I will probably try one of your mods.

My goal is to move away from s-video in favor to HDMI, so I will try your RGB mode and then use a converter from RGB (component) to HDMI.

Hopefully it will work.
by shadow338
Sat May 07, 2016 2:55 pm
Forum: ZX Spectrum Lounge
Topic: Harlequin video modifications
Replies: 40
Views: 41062

Re: Harlequin video modifications

Hello all, I know that this thread is been quiet old but I would like to ask a few questions. 1 - Pokemon says: "The Harlequin uses the AD724R circuit to create a composite video signal and I wonder why the signals Chroma und Luma are not used as it offers a S-Video (Y/C video) output for free which...
by shadow338
Fri Apr 01, 2016 8:11 pm
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum Harlequin rev. G problem
Replies: 9
Views: 10161

Re: ZX Spectrum Harlequin rev. G problem

that worked. thanks!
by shadow338
Fri Apr 01, 2016 4:54 pm
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum Harlequin rev. G problem
Replies: 9
Views: 10161

Re: ZX Spectrum Harlequin rev. G problem

One thing I noticed is I'm not getting any sound from the tiny speaker. I swapped the tiny and fragile speaker that came with the kit and installed one from an original ZX spectrum board but I still don't get any sound. I tested the speaker and it is in good working order. Does anyone knows the purp...