Re: CPLD replacement for ZX8301
Posted: Mon Jan 30, 2023 1:28 pm
Tested it with (but with R4=330)
and got
(This small LCD TV I use just for testing is bad and darker on top than bottom so camera can't adjust brightness correctly, result is better live)
The only thing that remains to be determined is what to use for blanking signal, using just the csync works but it has some rare random very short periods of blank screen at the TV I tested it. Could be this stupid tv.
Use what QL scart cables use.
Maybe better change R88 to 47 Ohm in the above
One can also use a resistor mixer like the one on the pcb, more components but they 'll fit in the scart cable connector.
So if one doesn't need the BW video of pin 3 this is a solution, thanks tofro
and got
(This small LCD TV I use just for testing is bad and darker on top than bottom so camera can't adjust brightness correctly, result is better live)
The only thing that remains to be determined is what to use for blanking signal, using just the csync works but it has some rare random very short periods of blank screen at the TV I tested it. Could be this stupid tv.
Use what QL scart cables use.
Maybe better change R88 to 47 Ohm in the above
One can also use a resistor mixer like the one on the pcb, more components but they 'll fit in the scart cable connector.
So if one doesn't need the BW video of pin 3 this is a solution, thanks tofro