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Dos Tables
Interrupts
DOS functions
DOS List formats
DOS Error codes
DOS Data Structures
Ports, EMS
I/O ports
EMS Error codes
Ansi control sequences
ASCII Chart
Line-Drawing Chars
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Color Chart
Keyboard Codes
Hardware
8237A-5 DMA Controller
8259A Interrupt Controller
8253-5 Programmable Interval Timer
8255A-5 Programmable Peripheral Interface
Serial Communication (RS-232)
Net Bios
Video
Credits
Port 3DB - Color Clear Light Pen latch
Write anything to this port to clear the Light Pen latch.
See Also:
3BB