Topic: Chip ??????

[C5 ENTHUSIAST + RESTORER]

Hi there do you Know what this is




more to follow

[radiomarty]

Could this be another one of your Prototypes Chas ?

[PLOD11]

in side of the ula chip ??

[C5 ENTHUSIAST + RESTORER]

yes you are both right its a proto type ula chip for the C5 ..
more to follow

[C5 ENTHUSIAST + RESTORER]

HERE IS ANOTHER PHOTO OF THE ULA CHIP THAT WAS A PROTOTYPE MADE IN CERAMIC AND DATED 1984 AND THE OTHER ONE AS WE KNOW IT . MORE CLOSE UPS TO FOLLOW



ALL THE CLOSE UPS WERE POSSABLE BY USING A VERY EXPENSIVE STEREOMICROSCOPE 
AND TAKEN BY DAVID BRYSON FROM THE UNIVERSITY of DERBY AND I WOULD LIKE TO THANK HIM FOR TAKING THE TROUBLE TO TAKE THEM FOR US ..(ps PLEASE CHECK OUT HIS WEB SITE    http://www.cladonia.co.uk)

Scientific, Medical and Technical Photography
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Accessible Web Design

Hi there Mike take a look at the inside of the c5 ULA Chip ....







More to photos follow

[radiomarty]

Fascinating  stuff Chas and good to see - thanks for posting them - any idea if this was the prototype for the ULA chip we all know and love ! or a new improved version of it ? (have you dared to power it up ?)

[C5 ENTHUSIAST + RESTORER]

Hi there it was a prototype for the ula chip as we know .The one that is here is a dud but i do have a working ceramic one ..

[Karl]

Superb piccies mate 

[C5 ENTHUSIAST + RESTORER]

Here are some more photos














More to follow Chas

[csmith]

Hi there,
Mike Green pointed me your way, as I've just completed the reverse engineering of the ZX Spectrum ULA.

Seeing these images reminds me of the excitement I felt when I got those of the 6C001E ULA...

I've got some information on the 'G' Digilin ULA, bit not much as there is little technical information in the Ferranti archives held by the Museum of Science and Industry in Manchester. Mostly their files are marketing and accounts info...

I had to work out the structure of the 6000 series ULA, and calculate the resistor values from the images. I will gladly help in this respect, having already gone through he process.

I am still trying to get as much ULA info as possible to compile a useful ULA knowledge base. My Spectrum ULA book contains much of what I know so far.

Let me know if you want me to outline my back-annotation proceedure, and how I verified my schematics (all very manual but fun!)

Chris
http://www.zxdesign.info

[C5 ENTHUSIAST + RESTORER]

Hi there Your help and advice would help more than you know ..Please ring me on 01159306030
  bye thanks Chas