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- Newsgroups: sci.electronics
- Path: sparky!uunet!munnari.oz.au!metro!sunb!macadam!johnh
- From: johnh@macadam.mpce.mq.edu.au (John Haddy)
- Subject: Re: VGA feature connector pinout
- Message-ID: <1992Nov18.065147.8701@mailhost.ocs.mq.edu.au>
- Sender: johnh@macadam (John Haddy)
- Nntp-Posting-Host: macadam.mpce.mq.edu.au
- Organization: Macquarie University, Sydney
- References: <truben.721928059@vipunen.hut.fi>
- Date: Wed, 18 Nov 1992 06:51:47 GMT
- Lines: 113
-
- In article <truben.721928059@vipunen.hut.fi>, truben@vipunen.hut.fi (Trygve Nyman) writes:
- |> Anybody got the pinout of the feature connector
- |> found on most VGA-cards? Complete specifications
- |> and points to litterature would be even better...
- |>
- |> Thanks,
- |> truben
- |>
-
- Before it got nicked, I had a good book "The programmers guide to the EGA/VGA" -
- published by Brady (I think). This, from recollection, had all you needed to know.
-
- I _think_ that the VGA feature connector may be the same as the EGA one. If so,
- here is the data (from the IBM EGA Technical Reference):
-
- GND 1 2 -12V
- +12V . . J1
- J2 . . G'OUT
- R'OUT . . B'OUT
- ATRS/L . . BOUT
- GOUT . . G
- R' . . B
- R . . ROUT
- FEAT1 . . BLANK
- FEAT0 . . FC1
- FC0 . . G'/I
- B'/V . . HIN
- VIN . . 14MHz
- Int. . . EXT OSC
- VOUT . . HOUT
- GND 31 32 +5V
-
- Signal Description:
-
- ("inputs" are signals coming _from_ the EGA, "outputs" are signals going _to_ the
- EGA via the feature connector. (typical IBM :-))
-
- J2 this pin is connected to auxiliary jack 2 on the rear panel. (Obviously
- not applicable to the VGA)
-
- R'OUT secondary red output
-
- ATRS/L attribute shift load. This signal controls the serialisation of the video
- information. The shift register parallel loads at the dot clock leading edge when
- this signal is low.
-
- GOUT primary green output
-
- R' secondary red input
-
- R primary red input
-
- FC1 this signal is input from bit 1 (Feature Control Bit 1) of the feature
- control register.
-
- FC0 this signal is input from bit 0 (Feature Control Bit 0) of the feature
- control register.
-
- FEAT0 this signal is output to bit 5 (Feature Code 0) of Input Status Register 0
-
- B'/V secondary blue input/monochrome video
-
- VIN vertical retrace input
-
- Int. this signal is output to bit 4 (Disable Internal Video Drivers) of the
- Miscellaneous Output Register.
-
- VOUT vertical retrace output
-
- J1 this pin is connected to auxiliary jack 1 on the rear panel.
-
- G'OUT secondary green output
-
- B'OUT secondary blue output
-
- BOUT blue output
-
- G green input
-
- B blue input
-
- ROUT red output
-
- BLANK this is a composite horizontal and vertical blanking signal from the CRTC
-
- FEAT1 this signal is output to bit 6 (Feature Code 1) of Input Status Register 0
-
- G'/I secondary green/intensity input
-
- HIN horizontal retrace input from the CRTC
-
- 14MHz clock from the system board
-
- EXT OSC external dot clock output
-
- HOUT horizontal retrace output
-
- CRTC = CRT Controller
-
- Hope this helps.
-
- JohnH
-
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- Sydney, AUSTRALIA 2109
-
- Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983
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