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Video driver thoughts

All information relating to the Alpha plus all the WIP threads etc.
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rpineau
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Re: Video driver thoughts

Post by rpineau »

Yes, that's a good idea, probably only needed for the bit 3 and 4 as after that the increase will be very small.
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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PhilC
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Re: Video driver thoughts

Post by PhilC »

At last, an opportunity for a triple decker. Now do I put it over or under the ram board :D
If it ain't broke, test it to Destruction.
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exxos
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Re: Video driver thoughts

Post by exxos »

Forgottenmyname wrote: 19 Oct 2018 21:26 At last, an opportunity for a triple decker. Now do I put it over or under the ram board :D
Don't follow what you mean ?
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PhilC
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Re: Video driver thoughts

Post by PhilC »

exxos wrote: 19 Oct 2018 21:30
Forgottenmyname wrote: 19 Oct 2018 21:26 At last, an opportunity for a triple decker. Now do I put it over or under the ram board :D
Don't follow what you mean ?
Well I already have the shifter in the adaptor board for your ram expansion.
If it ain't broke, test it to Destruction.
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exxos
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Re: Video driver thoughts

Post by exxos »

Forgottenmyname wrote: 19 Oct 2018 21:37 Well I already have the shifter in the adaptor board for your ram expansion.
oh yep :lol:
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exxos
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Re: Video driver thoughts

Post by exxos »

More of a final draft...

s2.png


..with something like this...

p1.jpg
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rpineau
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Re: Video driver thoughts

Post by rpineau »

I'm not sure about C1, C2 and C3 inline with RGB, the Falcon has 75 ohm resistors inline to match standard line impedance for video signals.
Are you doing this to eliminate any potential DC in the signal ?
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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exxos
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Re: Video driver thoughts

Post by exxos »

rpineau wrote: 19 Oct 2018 21:56 I'm not sure about C1, C2 and C3 inline with RGB, the Falcon has 75 ohm resistors inline to match standard line impedance for video signals.
Are you doing this to eliminate any potential DC in the signal ?
I'm doing it because that what it says in the datasheet.... I to am not sure why the falcon is wired up differently..
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rpineau
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Re: Video driver thoughts

Post by rpineau »

Works for me .. I think the datasheet is probable more accurate than what was done on the falcon :)
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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exxos
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Re: Video driver thoughts

Post by exxos »

rpineau wrote: 19 Oct 2018 22:12 Works for me .. I think the datasheet is probable more accurate than what was done on the falcon :)
Hopefully :) Easy to bridge them over if needs be anyway.

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