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18 pins connector
CGA=Color Graphics adapter
Pin Description
A01 TV vertical drive (not for display)
A02 Ground
A03 TV horizontal drive (not for display)
A04 Blue (CGA pin 5)
A05 Red (CGA pin3)
A06 Intensity (CGA pin 6)
A07 Green (CGA pin 4)
A08 Comp Sync Drive (not for display)
A09 Audio
B01 + Vertical drive (CGA pin 9)
B02 Ground
B03 + Horizontal drive (CGA pin 8)
B04 Ground
B05 Ground
B06 Ground
B07 Ground
B08 Ground
B09 Frame ground ('CGA pin 1')

 

 

Pinout status: +2 -1
According to 3 reports in our database (2 positive and 1 negative) the IBM PCjr CGA pinout should be correct.

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