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A Digital Comparator for Use with Computer Displays
March 1969 (vol. 18 no. 3)
pp. 269-270
A digital comparator has been attached to a PDP-4/340 display terminal. This comparator is used to detect the presence of the CRT beam within a specified portion of the display screen.
Index Terms:
Computer displays, computer graphics, digital comparator, light pen.
Citation:
N.A. Farmer, "A Digital Comparator for Use with Computer Displays," IEEE Transactions on Computers, vol. 18, no. 3, pp. 269-270, March 1969, doi:10.1109/T-C.1969.222641
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