If you want to ask questions about how the machine works, peculiar details, the differences between models, here it is !
How to program the oric hardware (VIA, FDC, ...) is also welcome.
Its reference is R26 and its value is 2k2... It pulls down to ground the line between ULA and 74LS365 / Prom 256x4....
Is it an help / a need for generating the Red color ? Why is there nothing like that with the Green and the Blue colors ?
Or is it only used with the PROM ?
I don't understand why there is such a single resistor just there...
Does anybody have information about it ?
Thanks for teaching me !
It's been sat there looking out-of-place, and yet completely innocent, all these years, and its purpose is to stop that video "output" line accidentally floating up to +5v. Spoiler Alert: This pin is also an input, but its not documented, until I fell over it while doing this ...