Re: Request for info on Apple II Video Overlay Card

[Lukazi <lukazi@hotmail.com>]

On Jan 14, 11:35 pm, roughana <andrew.roug...@writeme.com> wrote:
> On Jan 14, 2:48 am, Lukazi <luk...@hotmail.com> wrote:
>
> > I purchased an Apple II Video Overlay Card recently but it did not
> > come with any of the cables.
>
> > Does anyone know where I may be able to find information such as the
> > cable lengths and pictures of the cable ends? Schematics maybe?
>
> > Does the manual "Apple II Video Overlay Card Owner's Guide" have all
> > of this information in it?
>
> No it does not. Neither does the "Apple II Video Overlay Card
> Developer Notes" - Although it does provide a functional block diagram
> of the VOC and a pinout for the Video Expansion Bus connector on the
> front edge of the card.
>
> For posterity (nothing uses it that I know about) the AVEB pinouts
> are:
> 1 /SQRFILTERENA
> 2 NC
> 3 /RGBENA
> 4 NC
> 5 RIN
> 6 NC
> 7 GIN
> 8 Gnd
> 9 BIN
> 10 Gnd
> 11 KEYIN
> 12 Gnd
> 13 /HSYNC
> 14 /VSYNC
>
> However, "Apple II Video Overlay Card Developer Notes" does say
> "The RGB output connector on the Apple II VOC corresponds to the
> standard Apple IIgs DB-15 pinout converted to a ribbon block
> connector. Consult Chapter 4 of the Apple IIgs Hardware Reference
> Manual for details on the DB-15 connector."
>
> The RGB cable is 16cm long including the pin block and db-15 block.
> The Video cable is also a similar length. It goes to two RCA jacks.
> The top jack is In and the bottom is Out. There appears to be only
> three wires in this cable. It is a ribbon style cable but there is
> extra plastic between each wire and the cable itself is stiffer than a
> regular ribbon cable. My attempt to determine which pin went where was
> inconclusive, but I will try an alternate method if necessary.
>
> My card has numbers 820-0236-03 and 670-0236 A. I hope that's a PAL
> card, but I don't know for sure.
>
> Regards,
> Andrew

Perfect.

This information and the only picture that I could find on the net
(Using google images came up with http://altern8.envy.nu/alt8/apple2/index2.html)
is all that I need now.

I should be able to work out the RCA jacks by trial and error.

Thank you very much Andrew. Greatly appreciated.



Alex.