66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
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/*****************************************************************************\
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* *
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* comdev.h -
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* *
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* Version 1.0 *
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* *
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* Copyright (c) 1994, Microsoft Corp. All rights reserved. *
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* *
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\*****************************************************************************/
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/*************************************************************************
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**
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** Miscelaneous definitions.
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*/
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typedef unsigned short ushort;
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typedef unsigned char uchar;
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#define NULL 0
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#define FALSE 0
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#define TRUE 1
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#define LPTx 0x80 /* Mask to indicate cid is for LPT device */ /*081985*/
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#define LPTxMask 0x7F /* Mask to get cid for LPT device */ /*081985*/
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#define PIOMAX 3 /* Max number of LPTx devices in high level */ /*081985*/
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#define CDEVMAX 10 /* Max number of COMx devices in high level */
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#define DEVMAX 13 /* Max number of devices in high level */ /*081985*/
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/*************************************************************************
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**
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** Extended Functions
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**
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** SETXOFF - Causes transmit to behave as if an X-OFF character had
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** been received. Valid only if transmit X-ON/X-OFF specified
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** in the dcb.
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** SETXON - Causes transmit to behave as if an X-ON character had
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** been received. Valid only if transmit X-ON/X-OFF specified
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** in the dcb.
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*************************************************************************/
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#define SETXOFF 1 /* Set X-Off for output control */
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#define SETXON 2 /* Set X-ON for output control */
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#define SETRTS 3 /* Set RTS high */
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#define CLRRTS 4 /* Set RTS low */
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#define SETDTR 5 /* Set DTR high */
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#define CLRDTR 6 /* Set DTR low */
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#define RESETDEV 7 /* Reset device if possible */ /*081985*/
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/*=========================================================================
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;
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; qdb
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; Queue definition block. Passed to setqueue, defines the location and
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; size of the transmit and receive circular queue's used for interrupt
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; transmit and recieve processing.
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;
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;=========================================================================*/
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typedef struct tagQDB
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{
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char _far *QueueRxAddr; //Pointer to RX Queue, Offset
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unsigned QueueRxSize; //Size of RX Queue in bytes
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char _far *QueueTxAddr; //Pointer to TX Queue, Offset
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unsigned QueueTxSize; //Size of TX Queue in bytes
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} QDB;
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