88 lines
3.6 KiB
Plaintext
88 lines
3.6 KiB
Plaintext
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Instructions to Convert IBM PCjr Color Monitor
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to Standard DB 9 Connector
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Pin out for the IBM PCjr Color Monitor cable is:
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A1 EMPTY -Vertical Sync
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A2 Violet Logic Ground
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A3 EMPTY -Horizontal Sync
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A4 Dark Blue Blue (color)
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A5 Dark Red Red (color)
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A6 Orange Intensity
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A7 Green Green (color)
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A8 EMPTY Composite Sync
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A9 Gray Shielded Audio (white audio - high)
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B1 Yellow +Vertical Sync
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B2 EMPTY Logic Ground
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B3 Brown +Horizontal Sync
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B4 Lt.Red & Clear Reserved
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B5 Lt.Blue Logic Ground
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Black &
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Lt.Grey
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B6 EMPTY
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B7 EMPTY
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B8 Shield from A9 Audio (shielded ground)
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B9 Bare Wire Shielded Ground
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(Braided down entire cable)
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Refer to pages 2-82, 3-83, 3-93, and B-29 in the IBM PCjr
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Technical Reference Manual. Please note that on page 3-83,
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the view is from the rear of the connector. The pictorial
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appears to be viewing from the front. Please note: The
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schematic for the IBM Color Display on page B-29 is NOT the
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IBM PCjr Color Monitor. It is the IBM Color Display. There is
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a difference! This is just for reference.
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Cut the end of the cable off the IBM PCjr Monitor. Carefully
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remove the outer insulation and pre-tin these wires:
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Lt. Blue, Black, Lt. Grey, Dk. Red, Green, Dk. Blue, Orange,
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Brown, and Yellow. Tin the outer braided jacket close to the
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cable. Cut the braided wire close to the cable, leaving about
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1/4". Solder a short length of insulated wire to it. This is
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to keep the large braided cable from causing shorts in the
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connector. You will have four wire that you do not connect.
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These are a Grey shielded Audio cable, a Lt. Red or Pink
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wire, a Violet or Purple wire, and a Clear wire. Fold the
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four wires back along the cable and place a piece of heat
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shrink tubing on them.
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Purchase a DB-9 Male plug with a shielded hood. Solder the
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wires as follows:
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DB-9 Male Color of the PCjr Monitor cable From
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1 Bare wire or shielded jacket B9
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2 Lt. Blue, Black, & Lt. Grey B5
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3 Dk. Red A5
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4 Green A7
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5 Dk. Blue A4
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6 Orange A6
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7 No Connection
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8 Brown B3
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9 Yellow B1
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Place the hood on the DB-9 connector. You are now ready to
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test the monitor. No warranty is given to these instructions.
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This has been done to 3 IBM PCjr monitors with success. If
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you do not feel competent enough to solder the connections,
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contact Ron Brown or Ron McClanahan. We will perform the
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modification for a fee.
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Ron Brown Ron McClanahan
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1706 Aberdeen Dr. 4710 Barbara Road
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Arlington, TX 76015 Fort Worth, TX 76114
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817-265-9488 817-731-4930
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