ZX81CCP

ZX80 / ZX81 hardware and software offered for sale or swapping
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PokeMon
Posts: 2225
Joined: Sat Sep 17, 2011 6:48 pm

Re: ZX81CCP

Post by PokeMon » Tue Jul 04, 2017 12:25 pm

sirmorris wrote:
Tue Jul 04, 2017 12:21 pm
PokeMon wrote:
Tue Jul 04, 2017 11:50 am
... taking risk of unsold boards ...
As if ;) :lol:
Maybe they will be sold but if so, I have to do the next batch and need to collect for that batch too in the meanwhile ...
And there will be an end of this, but nobody exactly knows when. :shock:

Lardo Boffin
Posts: 859
Joined: Sat Nov 26, 2016 2:42 am

Re: ZX81CCP

Post by Lardo Boffin » Tue Jul 04, 2017 12:37 pm

PokeMon wrote:
Tue Jul 04, 2017 12:25 pm
And there will be an end of this, but nobody exactly knows when. :shock:
I nearly hit the 'Report Post' button when I saw that!
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

Lardo Boffin
Posts: 859
Joined: Sat Nov 26, 2016 2:42 am

Re: ZX81CCP

Post by Lardo Boffin » Sat Jul 08, 2017 9:24 pm

I just got my version 1.2 ZX8's. Very nice! 8-)
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

sirmorris
Posts: 2813
Joined: Thu May 08, 2008 5:45 pm

Re: ZX81CCP

Post by sirmorris » Wed Aug 30, 2017 7:08 pm

I'm having trouble tuning a 1.2 board using a TS1000 host. The K is razor sharp but I can't get the ZXpand banner text to display properly. If I tickle the pot I can just about get vaguely formed characters but the background is grey and noisy. Has anyone had success getting a TS1000 working with a 1.2?

Do I need to mod the board for NTSC? Going PAL isn't an option.

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PokeMon
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Joined: Sat Sep 17, 2011 6:48 pm

Re: ZX81CCP

Post by PokeMon » Wed Aug 30, 2017 7:23 pm

No the board works with NTSC or PAL same.
What if you invert the picture (jumper J7) ?
Does it work properly without ZXpand connected and when writing the screen full with a program ?

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PokeMon
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Re: ZX81CCP

Post by PokeMon » Thu Sep 21, 2017 12:55 am

So the new ZX8-CCB-SYNC is available at sellmyretro.
It offers a sync generator which avoid black screens with ZX80 or ZX81 using FAST mode.
There is no display contents but a blank picture shown with a small line in the top of screen.
It does support stripe patterns for LOAD/SAVE as well.

See the video published here with ZX8-CCB-SYNC in action. ;)
https://www.youtube.com/watch?v=1Re-nbXdKeg&t=3s

The price for the ZX8-CCB-SYNC is EUR 14.90 and there is also an upgrade kit available with just the micro controller to be soldered on existing ZX8-CCB. This requires the latest ZX8-CCB version V1.2 and medium soldering experience to handle the smaller pitch with 1.27mm or 1/20 inches.

https://www.sellmyretro.com/user/profile/PokeMon/


Here are the pics of ZX8-CCB-SYNC:
20170920_162801k.jpg
20170920_162801k.jpg (150.65 KiB) Viewed 2106 times
20170920_162811k.jpg
20170920_162811k.jpg (192.69 KiB) Viewed 2106 times

Lardo Boffin
Posts: 859
Joined: Sat Nov 26, 2016 2:42 am

Re: ZX81CCP

Post by Lardo Boffin » Thu Sep 21, 2017 5:38 pm

I have mine ordered for my everyday zeddy! :D
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

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PokeMon
Posts: 2225
Joined: Sat Sep 17, 2011 6:48 pm

Re: ZX81CCP

Post by PokeMon » Sun Dec 03, 2017 11:23 pm

Well some people told me, that LOAD and SAVE does not work with the current release of ZX8-CCB-SYNC. And that was correct, I tested LOAD/SAVE with a CRT monitor here and that didn't have sync problems.

So now LOAD and SAVE are supported as well on LCD or Plasma TV and the screen pattern is mixed with valid sync signals. This was a bit work, especially as LOAD and SAVE is very different. During LOAD short sync pulses are sent every 10-15us instead of every 64us. And during SAVE the timing is correct with sync pulses but there are missing lines.

All ZX8-CCB-SYNC ordered from around mid of november do support LOAD already and all orders from end of november do support SAVE, too. PAL and NTSC is supported and the inverted signal when used the J7 jumper from ZX8-CCB-SYNC. If somebody need an upgrade the easiest way is to remove the controller on the backside and order a new one via sellmyretro. I am sorry for this inconvenience.

Removing can be done best while heating the 4 pins on one side together, bend the chip with a small screw driver and remove while heating the other 4 pins. Then cleaning pads with solder wick. Just in case someone really uses LOAD and SAVE from audio (EAR/MIC). There is also a release marker shown during startup for about 1 second with a line pattern. Latest release is 1.2 - shown with 2 lines during startup. ;)

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PokeMon
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Joined: Sat Sep 17, 2011 6:48 pm

Re: ZX81CCP

Post by PokeMon » Tue May 08, 2018 12:23 am

ZX8-CCB is temporarily sold out but planned to be come back in a few weeks. ;)

dr beep
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Location: Boxmeer

Re: ZX81CCP

Post by dr beep » Fri May 11, 2018 2:42 pm


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