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Apple II Computer Info

David Empson

[email protected]

Snail mail: P.O. Box 27-103, Wellington, New Zealand

Newsgroups: comp.sys.apple2

Path:

blue.weeg.uiowa.edu!news.uiowa.edu!uunet!gatech!howland.reston.ans.net!wupost!waik

ato!comp.vuw.ac.nz!actrix.gen.nz!dempson

From: [email protected] (David Empson)

Subject: Re: RGB-connection question??

Message-ID: <[email protected]>

Nntp-Posting-Host: atlantis.actrix.gen.nz

Sender: [email protected] (News Administrator)

Organization: Actrix - New Zealand Internet Service Providers

Date: Fri, 9 Dec 1994 12:42:56 GMT

References: <[email protected]>

Lines: 73

In article <[email protected]>,

eugene welcome <[email protected]> wrote:

> >Hello, I have a friend with an Apple 2c+. I asked me what the pin

> >configuration is,but I honestly have no idea.

> Hi Joe: Here is what I have on the IIc and Laser128 as they were the

> same. [snip]

The information in your post about the IIc video port is WRONG!

It may be correct for the Laser 128. The IIc's video port has a set

of internal signals. The pins listed here might be correct for an RGB

adaptor attached to the IIc video port, but the video port itself does

NOT have any of the signals expected by an RGB monitor (they have to be

generated by an adaptor).

The following table (from your post) is correct for the IIgs, but most

of the listed signals for the IIc are wrong.

> Apple IIgs RGB Apple IIc and Laser-128 RGB

> Pin Signal Pin Signal

> === ====== === ======

> 1 Ground 1 Intensity signal

> 2 Red analog video 2 F14M - 14 MHz

> 3 Composite sync 3 Red - signal

> 4 Not connected 4 Blue - signal

> 5 Green analog video 5 Spkr sound output

> 6 Ground 6 Load Pulse for LCD

> 7 -5 volts 7 Dispen for LCD

> 8 +12 volts 8 +12 volts DC

> 9 Blue analog video 9 Horizontal Sync Signal

> 10 Not connected 10 Composite Video Sync Signal

> 11 Sound 11 Serial out - Data for LCD

> 12 Composite video (NTSC, PAL, 12 Composite Video Output

> or SECAM ) 13 Ground

> 13 Ground 14 Vertical Sync Signal

> 14 Not connected 15 Green - Signal

> 15 Not connected Note LCD = Liquid Crystal Display

The actual functions of the IIc video port are as follows:

1 TEXT Indicates text mode is active (special function in DHR mode)

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 420 of 572

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