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Article #43323Info on DOS COM Interrupt software please
From: Bob Drotleff
Date: Fri, 02 Mar 1990 02:28
Date: Fri, 02 Mar 1990 02:28
16 lines
1017 bytes
1017 bytes
Hello, I am trying to write a DOS stand alone program to do serial I/O out the COM1 port. I've written several subroutines in ASM to do polled COM1 stuff to interface to my Lattice "C" compiler but I want to get a program (in assembler) to install itself to handle IRQ requests to and from the COM1 port. I can successfully get it installed in the DOS ISR table but I have questions as to how you tell the interrupt controller that a character is ready to transmit. Any help or source listing's showing how this is done would be greatly appreciated. Please Email me any suggestions or comments. Thanx in advance. R.J. Drotleff
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!telxon!bobd From: bobd@telxon.UUCP (Bob Drotleff) Newsgroups: comp.sys.ibm.pc,comp.sys.ibm.pc.programmer Subject: Info on DOS COM Interrupt software please Keywords: DOS COM interrupts Message-ID: <478@telxon.UUCP> Date: 2 Mar 90 02:28:55 GMT Organization: Telxon Corporation, Akron OH Lines: 16