Video driver thoughts

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PhilC
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Re: Video driver thoughts

Post by PhilC » Fri Nov 30, 2018 12:39 pm

Well done Chris, Is there any further testing you'd like us to carry out with the current board? or should we now wait for the next revision?
If it ain't broke, test it to Destruction.

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Re: Video driver thoughts

Post by exxos » Fri Nov 30, 2018 12:45 pm

Forgottenmyname wrote:
Fri Nov 30, 2018 12:39 pm
Well done Chris, Is there any further testing you'd like us to carry out with the current board? or should we now wait for the next revision?
I don't think there is anything much else to try currently...

You could try adding the 75R resistors in series with the RGB lines and the 47pF caps to see if it makes any difference in video quality at all. ( Note that you may well have 33R already in series).
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

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Re: Video driver thoughts

Post by exxos » Fri Nov 30, 2018 1:59 pm

V3 board if anyone wants to get one made.

VIDEO_DACv3.zip
(11.1 KiB) Downloaded 33 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

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Re: Video driver thoughts

Post by kodak80 » Fri Nov 30, 2018 9:56 pm

v3 boards ordered from OSH Park. :D

Is there a component list available?
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Re: Video driver thoughts

Post by exxos » Fri Nov 30, 2018 10:15 pm

kodak80 wrote:
Fri Nov 30, 2018 9:56 pm
v3 boards ordered from OSH Park. :D

Is there a component list available?

Code: Select all

Part     Value                Device               Package      Library              Sheet

BLANK                         1,6/0,8              1,6/0,8      wirepad              1
C1       2.2uf                C-EUC0805            C0805        rcl                  1
C2       2.2uf                C-EUC0805            C0805        rcl                  1
C3       50pF                 C-EUC0805            C0805        rcl                  1
C4       50pF                 C-EUC0805            C0805        rcl                  1
C5       50pF                 C-EUC0805            C0805        rcl                  1
C6       2.2uf                C-EUC0805            C0805        rcl                  1
C8       10uf                 C-EUC1206            C1206        rcl                  1
C10      2.2uf                C-EUC0805            C0805        rcl                  1
CN1                           HDR-1X3-MTA-100      MTA-100-3V   con-hdrs40           1
IC1      STV8438CVQFP44_LARGE STV8438CVQFP44_LARGE PQFP44_LARGE Atari_MB_fixed2018v2 1
JP1                           JP2E                 JP2          jumper               1
R1       75                   R-EU_R1206           R1206        rcl                  1
R2       75                   R-EU_R1206           R1206        rcl                  1
R3       75                   R-EU_R1206           R1206        rcl                  1
SHIFTER  SHIFTER              SHIFTER              DIL40        Atari_MB_fixed2018v2 1
STF      SHIFTER              SHIFTER              DIL40        Atari_MB_fixed2018v2 1
v3.png
v3.png (157.15 KiB) Viewed 863 times

BTW - I already sent your V2 PCB + chip :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 kodak80 » Fri Nov 30, 2018 10:25 pm

Cool, thank you. I will wait for these to arrive :D
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
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Re: Video driver thoughts

Post by exxos » Fri Nov 30, 2018 10:39 pm

BTW - 50pF can also be 47pF is the value is hard to find. I've not looked for any of the parts yet...
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 kodak80 » Sat Dec 01, 2018 12:13 am

The STV8438CV chip does seem to be very hard to find with Google and non-existent on Mouser.
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
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Re: Video driver thoughts

Post by PaulJ » Sat Dec 01, 2018 2:04 am

kodak80 wrote:
Sat Dec 01, 2018 12:13 am
The STV8438CV chip does seem to be very hard to find with Google and non-existent on Mouser.
Here ya go Kodak..
https://www.exdwh.com/data/STV8438CV.pdf

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Re: Video driver thoughts

Post by Icky » Sat Dec 01, 2018 9:16 am

exxos wrote:
Fri Nov 30, 2018 1:59 pm
V3 board if anyone wants to get one made.
I take it this is just a neater version of the V2.patch board without the large caps.

V2.patch board :)
IMG_3353.png
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