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Article #2274

Re: Powerbook <--> Multiscan Adaptor

#2274
From: Paul Durrant
Date: Wed, 26 Nov 1997 00:00
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In article <Frogoz-2411972237450001@xplt.demon.co.uk>,
Frogoz@xplt.demon.co.uk (Tom Berriman) wrote:

> Can anyone help me find info on an adaptor that Apple claim exists which
> allows me to plug my PB 160's monitor out port into a 16" RGB Monitor
> (1710 without AppleVision hardware), not the powerbook tail thing, but an
> actual adaptor as my PB can only handle 640x480, and the monitor only
> displays 832x624. I guess it cuts some size down somewhere. Either way I
> don't care what it does, so long as it does it. I need that monitor

The PB160 can output video at up to 832x624. Unfortunately, it doesn't
recognise the new multi-scan monitors as anything other than 640x480
monitors. (This is because the monitor sense pins are used in a new way on
Multi-scan monitors which the older circuitry on the PB160 interprets as a
640x480 display.)

You need a simple adapter that passes through all the signals except the
three sense pins. Then, inside the adapter you need to wire a connection
between SENSE0 and SENSE2. This identifies the monitor as a 16'

regards,

Paul Durrant


  Video Pin-outs for the 15-pin Macintosh video connector:
  Pin No. Signal Name  Description
  1       RED.GND      Red ground
  2       RED.VID      Red video signal
  3       /CSYNC       Composite synchronization signal
  4       SENSE0       Monitor sense signal 0
  5       GRN.VID      Green video signal (with sync on some models)
  6       GRN.GND      Green ground
  7       SENSE1       Monitor sense signal 1
  8       n.c.         Not connected
  9       BLU.VID      Blue video signal
  10      SENSE2       Monitor sense signal 2
  11      C&VSYNC.GND  Ground for CSYNC and VSYNC
  12      /VSYNC       Vertical synchronization signal
  13      BLU.GND      Blue ground
  14      HSYNC.GND    HSYNC ground
  15      /HSYNC       Horizontal synchronization signal
  Shell   CHASSIS.GND  Chassis ground
Technical Details
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Path: arc1-ca.pugleaf.net!unknown!not-for-mail
References: <Frogoz-2411972237450001@xplt.demon.co.uk>

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From: pdurrant@durrant.demon.co.uk (Paul Durrant)
Subject: Re: Powerbook <--> Multiscan Adaptor
Date: 1997/11/26
Message-ID: <B0A1E7C09668B1805E@192.168.1.1>
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References: <Frogoz-2411972237450001@xplt.demon.co.uk>
Organization: Durrant Software Limited
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