Re: Video driver thoughts
Posted: 27 Nov 2018 21:05
Be interesting to see if yours has the same issue. Just checked the mail and nothing.. :mad: :mad: To bad we don't have transporters.. Can't wait. :cry: :cry: :cry:
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Be interesting to see if yours has the same issue. Just checked the mail and nothing.. :mad: :mad: To bad we don't have transporters.. Can't wait. :cry: :cry: :cry:
Its not a pull up as such, just series resistor with Vcc to power the analoge section of the chip... True 10R may be better, but I wouldn't have expected to be this much chaos without it.Icky wrote: 27 Nov 2018 21:05 First item between Falcon and board schematic
Falcon has pull up R503 on pins 15 & 26. Board schematic goes straight to Vcc
Other interesting item is DVCC1 & DVCC2 plus DGND1 and DGND2 don’t seem to feature in the Falcon schematic.exxos wrote: 27 Nov 2018 21:08Its not a pull up as such, just series resistor with Vcc to power the analoge section of the chip... True 10R may be better, but I wouldn't have expected to be this much chaos without it.Icky wrote: 27 Nov 2018 21:05 First item between Falcon and board schematic
Falcon has pull up R503 on pins 15 & 26. Board schematic goes straight to Vcc
Odd... must be there somewhere... its a the digital power supply to the chip, so doubt it would work without it.Icky wrote: 27 Nov 2018 21:13 Other interesting item is DVCC1 & DVCC2 plus DGND1 and DGND2 don’t seem to feature in the Falcon schematic.
Yes. The data sheet has 75R in series after the large caps and also a 75R pull down.exxos wrote: 27 Nov 2018 21:22 I guess you could swap out those 33R's in the RGB driver lines for 75R (or 68 or something around that value).. Maybe the colours are saturating causing the false colours :shrug:
The 75R pull down is inside the monitor (after the cable)Icky wrote: 27 Nov 2018 21:29 Yes. The data sheet has 75R in series after the large caps and also a 75R pull down.
Sounds promisingForgottenmyname wrote: 27 Nov 2018 21:40 Ok, so I have a few dodgy sockets on my STF, which is not helping, so I get to the TOS ver screen and it's white with b;ack writing as it should be.
Will try and get it to boot to desktop asap.
75R just makes it even more darker and the border is still blackIcky wrote: 27 Nov 2018 21:29Yes. The data sheet has 75R in series after the large caps and also a 75R pull down.exxos wrote: 27 Nov 2018 21:22 I guess you could swap out those 33R's in the RGB driver lines for 75R (or 68 or something around that value).. Maybe the colours are saturating causing the false colours :shrug: