What is the //c/IIc+ video port 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
