Re: need vga cable for second sight card

["Michael J. Mahon" <mjmahon@aol.com>]

David Wilson wrote:
> David Wilson wrote:
>
> > Judging by the picture in the manual you just need a female DE-15 crimp
> > connector, a 16 pin female IDC  and a length of 16 core ribbon cable.
>
>
> Ignore my pervious post. While the Apple RGB monitor cable is
> constructed using a crimp DA-15, the VGA cable uses a solder type
> DE-15F.
>
> I have metered the connections and they do not make perfect sense.
> There appear to be a couple of errors in my cable.

I've adjusted your table slightly...

> IDC-16F    DE-15F   VGA function
> ------------------------------------------
>   1          3       blue
>   2          4       (monitor ID 2)
>   3          2       green
>   4          7       green gnd
>   5          1       red
>   6          6       red gnd
>   7         NC
>   8         NC
>   9          5       gnd
>  10         13       Hsync (or composite sync)
>  11         11       (monitor ID 0)
>  12         14       Vsync

I get the same wiring (except that my IDC 9 connects to DE-15 5),
and it doesn't make sense--particularly when compared with the
"straight-through" IIgs RGB monitor cable:

IDC-16F    DA-15F  IIgs function
-----------------------------------
   1         1      red gnd
   2         9      blue
   3         2      red
   4        10
   5         3      composite sync
   6        11      (audio from IIgs)
   7         4
   8        12
   9         5      green
  10        13      blue gnd
  11         6      green gnd
  12        14
  13         7      (-5v from IIgs)
  14        15
  15         8      (+12v from IIgs)
  16  (not connected)

Does Apple use a non-standard connector numbering, or what?

-michael

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