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 ...

Postby frank.lukas » Mon Aug 15, 2016 12:36 pm

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 ...

Postby joska » Mon Aug 15, 2016 1:09 pm

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 ...

Postby joska » Thu Aug 18, 2016 7:57 am

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 ...

Postby frank.lukas » Mon Oct 10, 2016 6:01 pm

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 ...

Postby IRIOS » Sun Jan 29, 2017 11:13 am

Hello Frank,
Will the ET4000AX work with your interface ?
Thx

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

Postby joska » Sun Jan 29, 2017 2:15 pm

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 ...

Postby frank.lukas » Sun Jan 29, 2017 2:52 pm

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 ...

Postby IRIOS » Sat Feb 04, 2017 1:46 pm

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 ...

Postby ccarl84 » Wed Apr 19, 2017 9:18 pm

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 ...

Postby IRIOS » Sat Apr 22, 2017 7:49 pm

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 ...

Postby frank.lukas » Sat Apr 22, 2017 8:52 pm

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

Postby ccarl84 » Sun Apr 23, 2017 9:29 am

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 ...

Postby ccarl84 » Sun Apr 23, 2017 9:33 am

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 ...

Postby frank.lukas » Sun Apr 23, 2017 10:14 am

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 ...

Postby ccarl84 » Sun Apr 23, 2017 11:34 am

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 ...

Postby frank.lukas » Sun Apr 23, 2017 11:39 am

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 ...

Postby frank.lukas » Thu Apr 27, 2017 5:39 pm

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 ...

Postby crashman » Mon May 08, 2017 4:57 pm

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 ...

Postby frank.lukas » Sat May 13, 2017 12:30 pm

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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