Yes, nearly 1 year after the release of the Issue 6.1, I finally made the Issue 7 that would fix the VSYNC problem the previous release had!
What’s new in the Issue 7:
- There is now a 2 pin header to plug a reset button
- The hardware VSYNC should now work correctly
- One of the two ROM socket has been removed to reduce the schematic complexity, but it is now possible to use the original ROM, or any EPROM without the need to change anything on the PCB, because the /ROMDIS signal has been changed!
- Better, it is now possible, and easily to use a 32K EPROM with the addition of a switch (there are pin on the PCB for this) to select the memory bank.
The licence is still a CC BY-NC-ND ( 
), I will keep it until the PCB layout has been finished. I will anyway open a repository on github for the project.
Please use a link to this article instead of the PDF file when you want to share this schematic, as a direct link wont tell the user if a new version would be available.
So here is the Oric Schematic Issue 7
Very Nice 🙂
there is also pcb with only two 4464 (64Kx4bit dram chips)
Are the kicad schematics available anywhere?
I would love to create one board that proper TTL RGB, (s)video output over AD725, sram, selectable 4xrom and
without rf modulator and video prom 256×4.
It will at some point, I’m just not fully happy with the quality of it, and never finished the PCB layout, this project was originally done in the prehistory of KiCad, and routing such a board was a really pain at the time. I’ll post an update when it is done 🙂