Can you identify this scandoubler?

[Zetr0]

ahhh yes the classic GPS,

I thought it was the DAC though.... you can get one from a dead A1200 can you not?

[Zetr0]

Originally Posted by alexh

...I worked on the team that developed that chip ...

now I have to get you to sign my chip!!

[DDNI]

Hmmm Toastscan seems like an external unit...

[DDNI]

Originally Posted by Zetr0

ahhh yes the classic GPS,

I thought it was the DAC though.... you can get one from a dead A1200 can you not?

alexh said " GPS Triple DAC"
zetr0 said "DAC"

are they not one and the same chip?

[DDNI]

Is this the chip?
http://cesop.zarlink.com/zarlink/vp1...et-jan2001.pdf

http://www.rocelec.com/about/searchresults/

Seem to have 943 of the VP101-3BA instock.
Sent for a quote... Lets wait and see how many indivisions I can buy for what they want for one chip!!

[alexh]

Originally Posted by Zetr0

ahhh yes the classic GPS

GPS is the manufacturer not a chip name, GEC Plessy Semicondutor

Originally Posted by Zetr0

I thought it was the DAC though....

It is. Three, 10-bit DAC's in one chip.

Originally Posted by Zetr0

you can get one from a dead A1200 can you not?

Yeah, I think the A1200, A4000 and CDTV all use VP101 or pin-compatible clones.

Originally Posted by DDNI

Hmmm Toastscan seems like an external unit...

Yeah, my mistake. ToastScan is actually SoftHut not EyeTech. I think eyetech's range were called EZ-VGA and there were internal and external units, but I could be wrong. The external EZ-VGA / ToastScan is a design re-used by lots of companies, including the original Indivision.

Originally Posted by DDNI

Is this the chip?
http://cesop.zarlink.com/zarlink/vp1...et-jan2001.pdf

Erm, yeah see my link above.

[rkauer]

DAC means "Digital to Analog Converter". A triple DAC is just a DAC with 3 different channels, but it is still a DAC.

[alexh]

Originally Posted by rkauer

A triple DAC is just a DAC with 3 different channels, but it is still a DAC.

I think Zetro knew that. Didn't think I'd have to explain it :P

[DDNI]

Originally Posted by alexh

Erm, yeah see my link above.

lol your link was dead when i first tried it...

[DDNI]

I got a reply from Rochester... Minimum order value $50.
A bit pricey for one chip. Not bad for 18 but what to do with 17 spares

[Photon]

Originally Posted by alexh

Erm, yeah right. It doesn't work like that. The least significant bits of the colour bus are missing. Meaning fine detail in two very similar colours are merged into one solid block of colour. I very much doubt that you've not seen it. It's more that the loss is so subtle that you do not notice because you're not really looking.

To get a feel for what I mean:



Switch your gfx card to 16-bit and look at the image.

It should look something like this



You can see that in 16-bit mode several colours have been lost and look like solid colour bands

Then again, all LCDs are 18-bit, except maybe 5 in the whole world... maybe the TN flicker makes the 16-bit problem go away.

[djkoelkast]

Hi all,

I happen to have this chip (FlickerMagic), but the cable was soldered to the Cybergraphx directly, so I don't have the cable from the FlickerMagic to the VGA connector. I already tried making such cable but with no success, I think I had the pinouts wrong (found a pinout of a similair product).

Could anybody give me the correct pinout for this product?

The board has 8 pins, the VGA obviously has 15.

Here some pictures I made years ago:

[alexh]

Wow you've been trying to fix this a LONG time!

http://www.amiga.org/forums/showthread.php?t=21879

You probably get a better picture soldering directly to Cybergfx board like that.

Anyone who has one of these boards should be able to buzz out the pins with a multi-meter to get the pinout.

[djkoelkast]

Originally Posted by alexh

Wow you've been trying to fix this a LONG time!

http://www.amiga.org/forums/showthread.php?t=21879

You probably get a better picture soldering directly to Cybergfx board like that.

Anyone who has one of these boards should be able to buzz out the pins with a multi-meter to get the pinout.

Correct. Although I have another scandoubler now, I'd rather have this one working again. Also is the A4000 something I put away for a while and then I want to do something with it again, so this has taken some years

[djkoelkast]

Still looking for the pinout though, anybody who can help me out and use a multimeter on their DCE and tell me what goes where? Thanks!

[djkoelkast]

Sent an email to DCE, no answer unfortunatly.
Any success on the pins for me?

[djkoelkast]

Maybe there is anybody who can make me a picture of the VGA connector board so I can see the circuits, that will help too.
Thanks!

[xraynorm]

Hi. I have one of these. I made a temporary VGA connector because one of the tracks on the VGA board had burn out. I did have all the pin outs, but im not sure if I still have them. I had the original VGA board repaired, and I now use that. The Amiga is in storage at the moment what exactly do you need?

[djkoelkast]

Originally Posted by xraynorm

Hi. I have one of these. I made a temporary VGA connector because one of the tracks on the VGA board had burn out. I did have all the pin outs, but im sure if I still have them. I had the original VGA board repaired, and I now use that. The Amiga is in storage at the moment what exactly do you need?

Hi,

As I have no VGA board at all I need to rebuild it from scratch (or just a cable) so I need to know which pin of the scandoubler connects to which pin of the VGA connector.

[xraynorm]

Ok I have a bmon which I am not using. http://amiga.erkan.se/wp-content/upl...on-150x150.jpg With a straight through cable it will work. I could post this to you and you could buzz out the pins yourself, and send it back... will this help?