https://www.oric.org/ftp/ceo/ceomag/dow ... -09ocr.pdf
When I was browsing the old magazines on Oric.org, I came across an interesting article in a magazine. In the 1985 issue of Microric magazine, an extension called "Multicoloric" was mentioned. As far as I understand, this device allows 16 of the available 4096 colors to be programmed and used on the HIRES screen at the same time.
I was really surprised. Such a device that was conceived and made for Oric in 1985 could actually make a very important breakthrough for Oric. Perhaps I did not fully understand the project because my French is much worse than my English. Do you have any information about this hardware?
Extension Multicoloric?
Re: Extension Multicoloric?
Hi Peacer,
I think Jede tried to build it, but I seem to recall it had many miskates or lack of details so I'm not sure he managed to make it work.
Jede will tell you better than I do when he comes around.
I think Jede tried to build it, but I seem to recall it had many miskates or lack of details so I'm not sure he managed to make it work.
Jede will tell you better than I do when he comes around.
Re: Extension Multicoloric?
The principle is not very complex:
- The ORIC outputs 1 bit RGB colors, which can be counted as a color value index from 0 to 7
- The card intercept this output and use the index to control the Thomson DAC/palette chip to replace the input value by another value using a small array internally.
That's it really
What makes the card complex is all the part for programming the videochip (including the additional register to indicate a vertical position where the card will use the second set of 8 colors).
With what the ULA decapping told us and the few experiments we did, it would be kind of cool to redesign a simpler version of this card, and use it with multiple Oric outputs at the same time
- The ORIC outputs 1 bit RGB colors, which can be counted as a color value index from 0 to 7
- The card intercept this output and use the index to control the Thomson DAC/palette chip to replace the input value by another value using a small array internally.
That's it really
What makes the card complex is all the part for programming the videochip (including the additional register to indicate a vertical position where the card will use the second set of 8 colors).
With what the ULA decapping told us and the few experiments we did, it would be kind of cool to redesign a simpler version of this card, and use it with multiple Oric outputs at the same time