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Indy Internal VGA

Posted: Sat Apr 09, 2011 7:53 pm
by pentium
Was bored today and was fed up looking for a 13W3 adapter so pulled out the iron and a few things around the shop.






Means I can only use one GIO slot but oh well, it's not like I don't have three more of the damn systems. :roll:

awesome_choice.png (20.25 KiB) Viewed 182 times

Re: Indy Internal VGA

Posted: Sat Apr 09, 2011 10:43 pm
by sgifanatic
Very cool Pentium! I have seen couple of Wiki postings on this, but not based on the numbered pins on the Indy's mainboard. If you don't mind, could you please post the wiring diagram you used to get this to work?

Re: Indy Internal VGA

Posted: Sat Apr 09, 2011 11:07 pm
by pentium

Code: Select all

VGA                          13W3
1 ----------------------------R
5-----------------------------8 (it's ground, so wherever)
6-----------------------------R shield
7-----------------------------G shield
8-----------------------------B shield
9-----------------------------NOT USED (key)

13w3f.gif (729 Bytes) Viewed 1150 times

VGA Pinout
SGI 13W3 Pinout

Re: Indy Internal VGA

Posted: Sun Apr 10, 2011 3:53 am
by sgifanatic
Thank you very much!

Re: Indy Internal VGA

Posted: Sun Apr 10, 2011 5:14 am
by PymbleSoftware
Wiki'd here


Re: Indy Internal VGA

Posted: Sun Apr 10, 2011 12:01 pm
by milatchi
Impressive, most impressive. --paraphrased from Darth Vader

Re: Indy Internal VGA

Posted: Mon Apr 11, 2011 10:30 am
by duck
Very nice work!


(Yes, I just wasted an hour or so sketching that thing in inkscape :-P )

Re: Indy Internal VGA

Posted: Thu Feb 25, 2016 8:15 pm
by pentium
Five years later I want to point out that I really badly screwed up the 13W3 pinout and never saw sgifanatic's suggestion to fix that. :oops:
The one several posts above applies to other machines like the Onyx or Octane which use almost none of the extra pins on the 13W3 connector. Indy Newport Graphics however are a lot more monitor friendly and also supply a horizontal and vertical sync. The pinout is listed on page 201 of the Indy Owners guide but here's the proper wiring chart.

Code: Select all

      13W3                                         VGA
1 (Monitor Type 3) ------------------------- 15 (ID Bit 3)
2 (Monitor Type 0) ------------------------- 11 (ID Bit 0)
3 (Composite Sync) ------------------------- N/C
4 (Horiz. Sync) ---------------------------- 13 (Horiz. Sync)
5 (Vert. Sync) ----------------------------- 14 (Vert. Sync)
6 (Monitor Type 1) ------------------------- 12 (ID Bit 1)
7 (Monitor Type 2 -------------------------- 4 (ID Bit 2)
8 (Ground) --------------------------------- 6 (Red Shield)
9 (Ground)---------------------------------- 7 (Green Shield)
10 (Ground) -------------------------------- 8 (Blue Shield)
A1 (Red) ----------------------------------- 1 (Red)
A2 (Green) --------------------------------- 2 (Green)
A3 (Blue) ---------------------------------- 3 (Blue)
9 (Ground)* -------------------------------- 5 (Ground)
N/C ---------------------------------------- 9 (KEY/DDC +5v)

*All grounds are common, so it doesn't matter if you use pin 8, 9 or 10.

Re: Indy Internal VGA

Posted: Fri Feb 26, 2016 5:07 am
by dexter1
I changed the wiki to reflect this. Let me know if it needs more work.

Re: Indy Internal VGA

Posted: Tue Oct 10, 2017 8:33 pm
by uridium
Only just discovered this. Really like your work. Well done.

Re: Indy Internal VGA

Posted: Thu Oct 12, 2017 5:51 pm
by necron2600
Any interest in making some to sell? I would buy a couple if you do have an interest.