A UNIX Based Device Driver for the Vector General 3404 Graphics Display System (1982)
Defense Technical Information Center · leaf 69
is within the "near" zone ahove the tablet. The PRS bit in¬ dicates the stylus switch is depressed. The IEN bit is set to enable interrupts generated by a change in the XOS, YOS, PNN, or PSS bits. It is set by the device driver program when a user program requests use of the VG data tablet.…
Stewart,Bradley Ray · Air force inst of tech wright-patterson afb oh school of engineering · Display systems · Drives(Electronics) · Computer graphics · Subroutines · Input output devices · High level languages · Registers(Circuits) · Specifications · Compatibility · Paths · Interfaces · User needs · Interruption · Installation · Modification · Theses
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