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AuthorTopic: Amiga 500 to 1084S-P1 VGA Cable Schematics  (Read 3180 times)

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Offline zombi

Amiga 500 to 1084S-P1 VGA Cable Schematics
« on: November 16, 2014, 10:30:12 PM »
Looking for a diagram of VGA cable to use with my A500 and 1080S-P1. I am confused with goggle search results. I found three different cables. Which is the correct one?

First i found a diagram with 2 caps.


Then the same diagram without caps.


Then the third one which is completely different


Maybe I should find Anemos.
Only Amiga Makes It Possible!
 

Offline mechy

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #1 on: November 17, 2014, 01:58:30 AM »
The second picture in the middle is correct. Not sure why the first has caps but i have not run into a cable with caps. the third is wrong since it combined the grounds. they are separate for a reason.

i thought the 1084s-p1 used a round din on the monitor side btw?
 

Offline Oldsmobile_Mike

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #2 on: November 17, 2014, 04:52:22 AM »
Looks like the P1 used the D-sub connector. AFAIK there are still places that sell that cable new?  Have you tried ebay?

This website might help for future reference:

http://gona.mactar.hu/Commodore/monitor/Commodore_monitors_by_model_number.html
Amiga 500: 2MB Chip|16MB Fast|30MHz 68030+68882|3.9|Indivision ECS|GVP A500HD+|Mechware card reader + 8GB CF|Cocolino|SCSI DVD-RAM
Amiga 2000: 2MB Chip|136MB Fast|50MHz 68060|3.9|Indivision ECS + GVP Spectrum|Mechware card reader + 8GB CF|AD516|X-Surf 100|RapidRoad|Cocolino|SCSI CD-RW
 Amiga videos and other misc. stuff at https://www.youtube.com/CompTechMike/videos
 

Offline zombi

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #3 on: November 17, 2014, 05:56:39 AM »
I think i will go with the second diagram but I still wonder why there are caps in the first one?

Oldsmobile_Mike you are correct mine has D-sub connector. I already have the original cable. But I'm building an arcade cabinet with Amiga 500 inside and the original cable is not flexible enough to fit in.
Only Amiga Makes It Possible!
 

Offline gertsy

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Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #4 on: November 17, 2014, 06:09:54 AM »
Quote from: zombi;777687
I think i will go with the second diagram but I still wonder why there are caps in the first one?

Oldsmobile_Mike you are correct mine has D-sub connector. I already have the original cable. But I'm building an arcade cabinet with Amiga 500 inside and the original cable is not flexible enough to fit in.


Could the caps be to filter a noisy signal?
 

Offline zombi

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #5 on: November 17, 2014, 07:48:40 AM »
Quote from: gertsy;777689
Could the caps be to filter a noisy signal?


Do you mean there is no harm in putting two not so necessary caps? Would I get only a better cable with noise filtered sync signals?
Only Amiga Makes It Possible!
 

Offline Calimeiro

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #6 on: November 18, 2014, 07:38:43 PM »
Those capacitors are no filters, they just prevent the loss of the signal if refresh don't come timely.
You might encounter some flicker without caps.

Third picture isn't completely different, it's just mirrored horizontally and ground signals are painted black. It's same as #2 built for 1984s-D which can sync on composite signal. Thats what green is used for.
 

Offline Oldsmobile_Mike

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #7 on: November 18, 2014, 08:13:09 PM »
Would your original cable work coupled with a straight-through 9-pin extension cable?  Just a thought, probably still better to make your own.  I recall someone selling 23-pin connectors a while back on ebay, or you could get a 25-pin parallel port one and lop the end off.  But you probably know that already.  ;)
Amiga 500: 2MB Chip|16MB Fast|30MHz 68030+68882|3.9|Indivision ECS|GVP A500HD+|Mechware card reader + 8GB CF|Cocolino|SCSI DVD-RAM
Amiga 2000: 2MB Chip|136MB Fast|50MHz 68060|3.9|Indivision ECS + GVP Spectrum|Mechware card reader + 8GB CF|AD516|X-Surf 100|RapidRoad|Cocolino|SCSI CD-RW
 Amiga videos and other misc. stuff at https://www.youtube.com/CompTechMike/videos
 

Offline zombi

Re: Amiga 500 to 1084S-P1 VGA Cable Schematics
« Reply #8 on: May 20, 2015, 09:39:35 AM »
Just an update. I built the third cable and it is working perfectly. As I couldn't find dsub-23 for a reasonable price. I've bought dsub-25 and cut off 2 pins.
Only Amiga Makes It Possible!