Project PCB for a VOFA ET4000 Graphiccard Adapter ...

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frank.lukas
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

No

Ask Till for the source Files !?!

I have such an Adapter -> http://forum.atari-home.de/index.php?topic=12789.0

The Address range is differently and the I/O transfer from the VOFA is in 8bit mode and the Ram access is in 16bit mode.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by joska »

frank.lukas wrote:Ask Till for the source Files !?!
The sources are available, and I can see that it tries to autodetect if it's running on a STGA or VOFA adapter. I'll look into this in a few days.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by joska »

I'm painting my house these days so very little time left for fun, but I spent some minutes last night debugging this. The VOFA register base address is correctly detected, but the VGA init code runs in an endless loop waiting for a VBL. So I guess Till's init code does not work with my ET4000 card. I have some code that correctly initializes my ET4000, it's based on a register dump and I originally intended to use this in EmuTOS but I fear that it will only work with some cards.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

I have 9 PCB Sets left at the moment. I can assemble/build up the hole Adapter too, ask for a Price ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by IRIOS »

Hello Frank,
Will the ET4000AX work with your interface ?
Thx
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by joska »

IRIOS wrote:Will the ET4000AX work with your interface ?
It does, I have one.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

ET4000 cards that work will have ...

- Clockgenerator chip 2494 or compatible with a 14,xxx Quarz
- 1MB Ram
- TSENG ET4000 Chip
- 80Mhz RAMDAC (1024x768/256 Colours at 60Hz will also work with a 66Mhz RamDAC)

SynDAC or GenDAC cards with a buildin Clockgenerator in the RAMDAC and cards with PAL or GAL chips do not work.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by IRIOS »

Ok thanks for your answers !!
Possible to order an adapter ? And How much with shipping cost to France ?
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by ccarl84 »

Good Evening Franck,


I might be interested in an adapter.
How much does it cost for France?
Is it easy to install?
What card do you advise me?

Thank you.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by IRIOS »

Hi ccarl84 !!

I see that you are interested too. ;)
We can do the tests together. :)
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

PM send ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by ccarl84 »

IRIOS wrote:Hi ccarl84 !!

I see that you are interested too. ;)
We can do the tests together. :)
Yes, I'm. :D

But it's too expensive for me. And I don't know how it's work.

I call you in a few ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by ccarl84 »

frank.lukas wrote:PM send ...

Thank you for the answer.
I think about what I can do ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

Hello ccarl84, buy for 20,- Euro a PCB Set and solder the Adapter by your self. It is simple and I can help with advices ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by ccarl84 »

Hello,

I thank you for your proposal.
I am looking around for an ET4000 ISA card and I discuss with Irios for editing.
I come back to you as soon as ...

Thank you.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

Most ET4000 cards will work in the VOFA Adapter. Cards with control PAL/GAL Chips will not work. Also problems there with cards that have a Gen/SyncDAC ...

Nova Driver for VOFA -> https://silicon-heaven.org/atari/nova/

Also look at atari-home for the VOFA Thread ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

Adapter build up and tested ...
Adapter_VOFA_klein.jpg

NVDI ET4000 Version 3 Benchmark on a stock Atari Mega ST4 (800x600/256 Color) ...
VOFA_NVDI_Benchmark.gif
Nova Driver Benchmark on a stock Atari Mega ST4 (800x600/256 Color) ...
VOFA_Nova_Benchmark.gif
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by crashman »

Hi frank.lukas,
I have this card, would it be compatible?
Thanks.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

The picture are not big enough. Try it with the Nova Driver T0 or T8 -> https://www.silicon-heaven.com/atari/nova/VOFA/

bootorder is 1. emulator.prg, 2. menu.prg, 3. sta_vdi.prg and the BIB Files ...

When the ISA Pad B7 is connected on the card you must connect -12V from the Mega ST Mainboard (Serial Port Circuit, see the schematics) ...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by matej »

Can you make STGA too?I have just STFM...
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

Hello matej, I make a VOFA Layout for the 68k CPU ...

Next month I order PCBs.
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by TheNameOfTheGame »

Looking forward to it. :cheers:
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by matej »

Nice!Will take 2x VOFA CPU ST version!
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by gwinter »

Frank,
Perhaps you still have pcb for this interface ( mega st ) ?

JZ
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Re: Project PCB for a VOFA ET4000 Graphiccard Adapter ...

Post by frank.lukas »

at this Time I have only Mega ST Bus Versions. Send me a PM if you will have one ...
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