Apple Macintosh Portrait Display
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Features, Specs
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* 640x870 Pixel (1/2 megapixel) "full page display"
* Monochrome/Grayscale
* CRT
* 14.2 inch visible screen
* 80 dpi
* Model M1031
* 3 port Apple Desktop Bus (ADB) hub
* 13w3 connector towards computer/video card

* 75 Hz vertical
* 68.85 kHz horizontal
* 57.283 2MHz dot clock rate
* 16 kg weight
* 75 watts maximum power requirement

* Voltage operating range 90 to 270 V rms, self-configuring
  * Frequency 47 to 63 Hz
* Operating ambient temperature 10° to 35° C (50° to 95° F)
* Operating humidity 90% maximum, noncondensing
* Operating altitude 3,000 meters (10,000 feet) maximum

Compatible with
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* Apple Macintosh II Portrait Display Video Card M0119
  NuBus 820-5037-B
  Toshiba 344S0077 chip
  13w3 connector
* Apple Macintosh IIsi
* Apple Macintosh IIci
* Apple Performa 475, LC475
* Apple 1st gen PCI PowerMacs (7500, 8500, 9500)

Cable
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* Apple Macintosh Portrait video cable 590-0615-A
  DB-15 two rows male, to 13W3

Option
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* Macintosh II Video Card Expansion Kit, M0213

13w3 pinout
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___________________________
\  A1   1 2 3 4 5  A2 A3  /
 \  O  6 7 8 9 10  O  O  /
  \_____________________/
  
A1: Monochrome video
A2: 75 Ohm
A3: 75 Ohm
1: Hsync return
2: Vsync
3: Sense #3
4: Sense ground
5: Csync (not used)
6: Hsync
7: Vsync return
8: Sense #2
9: Sense #1
10: Csync return (not used)
Shell: ground

Input signal
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Video: Analog RS-343
Sync: Separate sync, negative going, TTL

URLs:
* Apple Macintosh Portrait Display Owner's Guide:
  https://vintageapple.org/macmanuals/pdf/Apple_Macintosh_Potrait_Display_Owners_Guide1989.pdf