Cybervision 64/3d repair (macro pr0n for Z and others)

chiark · 07 May 2009, 15:07

I bought a faulty CV64/3d from Jiffydos on amiga.org. It had been buchered by someone packaging it back to back with another card, so had scratches on the PCB...

From a quick inspection, 3 pins on the s3 chip were also duffed in: they were shorting to other pins, and they were disconnected from their pads.

These were *damned* fiddly!! Scalpel and a fine pointer thingy (technical workshop term there) were employed.

Then the PCB... Two bits were easy. The last one was a complete sod!

About 5mm was missing completely, and running close to 2 other traces. By close, I mean that all 3 were within 1mm which is right at the tolerance of my eyesight, skill and patience!

The scandoubler works, but only when it is being physically bent in a particular way suggesting a dry joint or similar. I've removed the VGA connector and checked everything: one SMD device has no continuity over it. Other similar devices show <1ohm resistance.

The one in question is on the bottom of the board, just to the right and above the right edge of the edge connector...

I'm guessing that this is a ferrite bead, but any ideas how to find out what its impedance at a certain frequency is?

Chain · 07 May 2009, 17:31

looks more like plain fuse to me

chiark · 07 May 2009, 17:38

Thanks Chain. It's currently replaced by a strand of wire

- probably not the right approach, but I'll see if it works once I get another PCB mountable VGA connector!

alexh · 07 May 2009, 18:29

Is it now fully repaired?

If you live anywhere in the Oxford area I could arrange for some help.

chiark · 07 May 2009, 21:19

Thanks Alex. The main board is now perfect, but the scandoubler is needing a new VGA PCB connector... And possibly the right SMD component, but I've simply put a wire across the 2 terminals

. Possibly not great for RF or noise.

I'm in West Yorkshire, not really near Oxford... But thanks for the thoughts!

alexh · 07 May 2009, 21:58

Can any games on the Amiga use the 3D deceleration of the S3 Dirge on the CV64/3D?

Are there 68k versions of software that uses Warp3D or are they all PPC?

ADescent68k : Amiga Descent for 68k & Warp3D
BlitzQuake_68k : GLquake & GLqwcl for 68K & Warp3D

These were the only two I could find, 5fps no doubt?

Oooo

Vague Diskmag for 68k Warp3D

AND

Payback Warp3D also... I wonder what that's like?

chiark · 08 May 2009, 21:36

I realise there's two threads going on here, so apologies for that. This is for the pictures

Anyhow, I've soldered my new VGA connector on and simply bridged the bead...

SUCCESS!

Happy Chiark here

TheCorfiot · 08 May 2009, 21:51

Nice one my friend

Told you it would be OK to just short it...

TC

alexh · 08 May 2009, 22:11

Install the latest Warp3D and see if anything is worth running

DoogUK · 08 May 2009, 23:03

Nice result mate

AmigaFriend · 08 May 2009, 23:23

No butter fingers for you for sure! Excellent job and hope that you can enjoy your Cybervision fully!

chiark · 08 May 2009, 23:33

Thanks for the kind words

Yes, I'll see what I Can find for Warp3d, however I don't have a PPC, merely a warpengine 40

alexh · 09 May 2009, 01:58

There are 68k versions of the demos and games I mentioned linked above. You should see some hardware 3D screens if you're lucky.

chiark · 09 May 2009, 18:25

Cor

Thanks, I'll take a look!

zipper · 09 May 2009, 19:11

Probably Descent at 320x400 is the only one that works somewhat well when on over 320x200/240 screens.

07 May 2009, 15:07	#1
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	Cybervision 64/3d repair (macro pr0n for Z and others) I bought a faulty CV64/3d from Jiffydos on amiga.org. It had been buchered by someone packaging it back to back with another card, so had scratches on the PCB... From a quick inspection, 3 pins on the s3 chip were also duffed in: they were shorting to other pins, and they were disconnected from their pads. These were damned fiddly!! Scalpel and a fine pointer thingy (technical workshop term there) were employed. Then the PCB... Two bits were easy. The last one was a complete sod! About 5mm was missing completely, and running close to 2 other traces. By close, I mean that all 3 were within 1mm which is right at the tolerance of my eyesight, skill and patience! The scandoubler works, but only when it is being physically bent in a particular way suggesting a dry joint or similar. I've removed the VGA connector and checked everything: one SMD device has no continuity over it. Other similar devices show <1ohm resistance. The one in question is on the bottom of the board, just to the right and above the right edge of the edge connector... I'm guessing that this is a ferrite bead, but any ideas how to find out what its impedance at a certain frequency is?

07 May 2009, 21:58	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,473	Can any games on the Amiga use the 3D deceleration of the S3 Dirge on the CV64/3D? Are there 68k versions of software that uses Warp3D or are they all PPC? ADescent68k : Amiga Descent for 68k & Warp3D BlitzQuake_68k : GLquake & GLqwcl for 68K & Warp3D These were the only two I could find, 5fps no doubt? Oooo Vague Diskmag for 68k Warp3D AND Payback Warp3D also... I wonder what that's like? Last edited by alexh; 07 May 2009 at 22:29.

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07 May 2009, 17:31	#2
Chain A-Collector, repairments Join Date: Jul 2001 Location: Czech Rep. Age: 50 Posts: 1,536	looks more like plain fuse to me

07 May 2009, 17:38	#3
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	Thanks Chain. It's currently replaced by a strand of wire - probably not the right approach, but I'll see if it works once I get another PCB mountable VGA connector!

07 May 2009, 18:29	#4
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,473	Is it now fully repaired? If you live anywhere in the Oxford area I could arrange for some help.

07 May 2009, 21:19	#5
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	Thanks Alex. The main board is now perfect, but the scandoubler is needing a new VGA PCB connector... And possibly the right SMD component, but I've simply put a wire across the 2 terminals . Possibly not great for RF or noise. I'm in West Yorkshire, not really near Oxford... But thanks for the thoughts!

08 May 2009, 21:36	#7
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	I realise there's two threads going on here, so apologies for that. This is for the pictures Anyhow, I've soldered my new VGA connector on and simply bridged the bead... SUCCESS! Happy Chiark here

08 May 2009, 21:51	#8
TheCorfiot Amibay Senior Staff Join Date: Feb 2008 Location: Cardiff / Wales Posts: 1,302	Nice one my friend Told you it would be OK to just short it... TC

08 May 2009, 22:11	#9
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,473	Install the latest Warp3D and see if anything is worth running

08 May 2009, 23:03	#10
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	Nice result mate

08 May 2009, 23:23	#11
AmigaFriend Registered User Join Date: Sep 2008 Location: Sesimbra/Portugal Posts: 1,462	No butter fingers for you for sure! Excellent job and hope that you can enjoy your Cybervision fully!

08 May 2009, 23:33	#12
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	Thanks for the kind words Yes, I'll see what I Can find for Warp3d, however I don't have a PPC, merely a warpengine 40

09 May 2009, 01:58	#13
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,473	There are 68k versions of the demos and games I mentioned linked above. You should see some hardware 3D screens if you're lucky.

09 May 2009, 18:25	#14
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	Cor Thanks, I'll take a look!

09 May 2009, 19:11	#15
zipper Registered User Join Date: Mar 2004 Location: finland Posts: 1,844	Probably Descent at 320x400 is the only one that works somewhat well when on over 320x200/240 screens.

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