Re: Trying to set up an portable IIc+

[Anonymous <x.y@tennis.net>]

The following was cut from mates' faq:


1- TEXT Video text signal from TMG; set to inverse of GR, except in double
high-resolution mode.
2- 14M 14M master timing signal from the system oscillator.
3- SYNC* Displays horizontal and vertical synchronization signal from IOU
pin 39.
4- SEGB Displays vertical counter bit from IOU pin 4; in text mode,
indicates second low-order vertical counter; in graphics mode, indicates
low-resolution.
5- 1VSOUND One-volt sound signal from pin 5 of the audio hybrid circuit
(AUD).
6- LDPS* Video shift-register load enable from pin 12 of TMG.
7- WNDW* Active area display blanking; includes both horizontal and
vertical blanking.
8- +12V Regulated +12 volts DC; can drive 300mA.
9- PRAS* RAM row-address strobe from TMG pin 19.
10- GR Graphics mode enable from IOU pin 2.
11- SEROUT* Serialized character generator output from pin 1 of the 
74LS166
shift register.
12- NTSC Composite NTSC video signal from VID hybrid chip.
13- GND Ground reference and supply.
14- VIDD7 From 74LS374 video latch; causes half-dot shift high.
15- CREF Color reference signal from TMG pin 3; 3.58 MHz.
Note: The signals at the DB-15 on the Apple IIc are not the same as those 
at the DB-15 end of the Apple III, Apple IIGS, and Macintosh II. Do not 
attempt to plug a cable intended for one into the other.
Several of these signals, such as the 14 MHz, must be buffered within 
about 4 inches of the back panel connector--preferably inside a container 
directly connected to the back panel.