Re: IIc RGB port pinouts...

[Rubywand <rubywand@swbell.net>]

Tony Cianfaglione writes ...
> 
> Could someone please post the pinouts for the raw signal port (db15) RGB
> on a IIc?
> 
> Thanks...


     Here is a snip from the newsgroup FAQs (ref: Csa2MONITOR.txt on Ground):


>>

From: David Empson 

022- I have a friend with an Apple IIc+ who wants to connect 
     an RGB monitor. What is the IIc+ video pin configuration? 

     First, I should correct a misconception: the video port on the back of
the IIc+ is _not_ an RGB port.  It is a video expansion port, which provides
all of the internal video generation signals used by the IIc/IIc+ which can
be used to generate an alternative video output signal. 

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

1   TEXT     Indicates text mode is active (spcl fn in DHR mode) 
2   14M      14 MHz clock sigal 
3   SYNC     Horizontal and vertical sync 
4   SEGB     Vertical counter signal from IOU, or lo-res indication 
5   1VSOUND  Sound output (one volt peak-to-peak) 
6   LDPS     Video shift load enable 
7   WNDW     Active area display blanking 
8   +12V     +12 volts DC 
9   PRAS     RAM row address strobe 
10  GR       Graphics mode enable 
11  SEROUT   Serialized character generator output 
12  NTSC     Composite NTSC video output 
13  GND      Ground reference 
14  VIDD7    Bit 7 of video shift latch (hires mode col shifting) 
15  CREF     Colour reference timing signal 

These come from the IIc Technical Reference, both first and second editions. 
  

     You cannot connect a monitor directly to the IIc video port (with the
possible exception of the the LCD display, or an NTSC monitor). To produce
RGB output (or anything else) from this port, you need an external adaptor
box. 

<<



Rubywand