Chroma 81 - SCART and Colour interface for the ZX81

Discussions about Sinclair ZX80 and ZX81 Hardware
zx4ever
Posts: 4
Joined: Wed Jun 27, 2018 10:58 pm

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by zx4ever » Thu Jun 28, 2018 11:04 am

These days I tried some colorized games for the Chroma 81 interface from here http://www.fruitcake.plus.com/Sinclair/ ... urised.htm and I have some questions about it.
Most of these games come with color files (.col) and must be created with a utility such as Chroma Program Enhancement Creator.
My problem is that this utility will not work on my pc with windows 7 32bit, just gives a splash screen at launch with error message "Unhandled exception has occured ..." as in this picture.
Image

Does anyone know how to fix this or maybe someone can share a link with prepared colorized .p files, ready for use on the Chroma interface?
I would like to try all the colorized games like 3d Monster maze, Quack, Ant Attack, Flight simulator etc, but for now I have only a few already converted, which I found on youtube.
Thanks in advance. :)

zx4ever
Posts: 4
Joined: Wed Jun 27, 2018 10:58 pm

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by zx4ever » Sat Jun 30, 2018 3:43 pm

I solved the problem by reinstalling windows.
Now everything works well. :)

Fruitcake
Posts: 113
Joined: Wed Sep 01, 2010 10:53 pm
Contact:

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by Fruitcake » Sat Jun 30, 2018 10:16 pm

zx4ever wrote:
Sat Jun 30, 2018 3:43 pm
I solved the problem by reinstalling windows.
Now everything works well. :)
Good news!! :)

zx4ever
Posts: 4
Joined: Wed Jun 27, 2018 10:58 pm

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by zx4ever » Sun Jul 01, 2018 5:47 pm

Yes, exactly. ;)
In fact, I have found now, the exact reason why this error occurs.
For some reason, this happens only if the global font size in windows 7 has increased from smaller 100% to eg. medium 125%, as I did because the default font size was always very small.
These settings are located in the Control Panel / Display and can be easily reproduced.
Could you possibly fix this issue?
Google says that a very small number of applications suffer from this problem, which can be very frustrating until we realize what is the real cause of it.

Fruitcake
Posts: 113
Joined: Wed Sep 01, 2010 10:53 pm
Contact:

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by Fruitcake » Mon Jul 02, 2018 11:32 pm

Good find!

I've had a look and there isn't a quick fix to this with the current code base. The program will need some reworking to properly support auto-scaling to the selected font size. I'll add it to my list of things to be do. Unfortunately for now you'll now to keep the font size at 100%. :(

Fruitcake
Posts: 113
Joined: Wed Sep 01, 2010 10:53 pm
Contact:

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by Fruitcake » Fri Sep 14, 2018 2:20 am

A plastic case for the Chroma interface is now available. It is 3D printed and coloured black, with a red reset button to match the red logo of the ZX81's case. All sockets of the interface are exposed, with a hinged cover over the ROM cartridge socket.

ChromaInterfaceCase.png

The case is composed of two parts that are held together with screws. Fitting the case is therefore just a matter of screwing the top and bottom halves together (using a small cross head screwdriver).

An optional logic update is available that adds support for CHR$128 UDG graphic mode and also widens the tolerance for more extreme video displays generated by custom driver routines. All boards shipped in 2018 have the updated logic programmed into them by default. It is possible to update the board yourself if you have the necessary CPLD programming equipment, or else it can be returned to me for updating.

You can contact me via www.fruitcake.plus.com if you wish to obtain a case for your Chroma board and/or to return your board for updating with CHR$128 UDG mode support. If you are not sure whether your board has the latest logic then contact me and I can let you know.

Lardo Boffin
Posts: 799
Joined: Sat Nov 26, 2016 2:42 am

Re: Chroma 81 - SCART and Colour interface for the ZX81

Post by Lardo Boffin » Fri Sep 14, 2018 1:12 pm

Heres mine with my own custom sticker! Top stuff.

6A58FD13-13D5-455A-B129-9857ECC0E58E.jpeg
ZX81 iss 1 (bugged ROM, kludge fix, normal)
Iss 3 with ZXVid, another in nearly perfect box
TS 1000 iss 3, ZXPand AY, ZX8-CCB & ZX-KDLX
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Spectrum 48k
Toastrack + DIVMMC future

Post Reply