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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: 2024/11/8 16:00,
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Quick, Easy and CHEAP! RCL-1 RS232 Level Converter in a DB9 backshell
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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