Embedded Files
This DEC GT-40, S/N 185. was donated by John Wilson on 1/27/19.
The Digital Equipment GT40 Graphics Terminal was introduced in 1972 at a price of about $11,000. It consists of the VR17 Display Assembly that can have an attached LK40 keyboard and 375 light pen, and the VT40 Computer. The VT40 computer is a PDP-11/05 that contains the VT11 Display Processor, and a DL11 Asynchronous Line Interface. The VT40 can have either 4k (GT40-AA) or 8k (GT40-BA) of core.
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The GT40 consists of the VR17 Display Assembly and the PDP-11/05 that contains the VT11 Display Processor.
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The left side of the PDP-11/05 processor with the covers removed.
The top board that is visible is the A320 Light Board.
To Do:
Check the operation of the console lock switch
Check the DCOK signal from the power supply
Replace the broken resistor on the M7014 Bus Control & Bootstrap board
Find a DL11-W serial console board and two cables
Buy spare AC KBPC25-02-5 diode bridges for the power supply
Find a G840 FlipChip to go with the 375 Light Pen that Mattis could donate.
Make sure that there is an M930 Unibus terminator in slot AB05.
Done:
Replace the AC diode bridge (D14) in the power supply with one borrowed from a spare broken power supply
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This PDP-11/05 was assembled in San German Puerto Rico.
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This VR14L monitor was assembled in Westminister, MA.
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The A320 Light Board Component Side.
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The A320 Light Board Solder Side.
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The M7013 VT11 Display Control & Character Generator Component Side.
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The M7013 VT11 Display Control & Character Generator Solder Side.
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The VT11 Bus Control & Bootstraps Component Side.
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The VT11 Bus Control & Bootstraps Solder Side.
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