Video driver thoughts

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rpineau
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Re: Video driver thoughts

Post by rpineau » Fri Oct 19, 2018 9:25 pm

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 » Fri Oct 19, 2018 9:26 pm

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 » Fri Oct 19, 2018 9:30 pm

Forgottenmyname wrote:
Fri Oct 19, 2018 9:26 pm
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 ?
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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PhilC
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Re: Video driver thoughts

Post by PhilC » Fri Oct 19, 2018 9:37 pm

exxos wrote:
Fri Oct 19, 2018 9:30 pm
Forgottenmyname wrote:
Fri Oct 19, 2018 9:26 pm
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 » Fri Oct 19, 2018 9:40 pm

Forgottenmyname wrote:
Fri Oct 19, 2018 9:37 pm
Well I already have the shifter in the adaptor board for your ram expansion.
oh yep :lol:
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: Video driver thoughts

Post by exxos » Fri Oct 19, 2018 9:44 pm

More of a final draft...

s2.png
s2.png (60.73 KiB) Viewed 960 times


..with something like this...

p1.jpg
p1.jpg (136.62 KiB) Viewed 955 times
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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rpineau
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Re: Video driver thoughts

Post by rpineau » Fri Oct 19, 2018 9:56 pm

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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Re: Video driver thoughts

Post by exxos » Fri Oct 19, 2018 10:02 pm

rpineau wrote:
Fri Oct 19, 2018 9:56 pm
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..
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: Video driver thoughts

Post by rpineau » Fri Oct 19, 2018 10:12 pm

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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Re: Video driver thoughts

Post by exxos » Fri Oct 19, 2018 10:18 pm

rpineau wrote:
Fri Oct 19, 2018 10:12 pm
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.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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