Interrupt 0Bh Communications Controller (serial port) hdw. entry(0:002Ch) (IRQ3) Serial Port 2 (com2)
note 1) IRQ 3 may be used by SDLC (synchronous data-link control) or
bisynchronous communications cards instead of a serial port.
2) The TOPS and PCnet adapters use this interrupt request line as an
alternate
(internal) not present (80286 protected-mode)
Generated when loading a segment register if the segment descriptor
indicates that the segment is not currently in memory. May be used to
implement virtual memory.
file: /Techref/int/0B.htm, 0KB, , updated: 1999/2/20 10:27, local time: 2024/11/16 16:54,
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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