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/* mc68681reg.h -- Motorola mc68681 DUART register offsets.

 * Copyright (c) 1995 Cygnus Support

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

#define DUART_MR1A      0x00            /* Mode Register A */

#define DUART_MR1A      0x00            /* Mode Register A */

#define DUART_SRA       0x01            /* Status Register A */

#define DUART_CSRA      0x01            /* Clock-Select Register A */

#define DUART_CRA       0x02            /* Command Register A */

#define DUART_RBA       0x03            /* Receive Buffer A */

#define DUART_TBA       0x03            /* Transmit Buffer A */

#define DUART_IPCR      0x04            /* Input Port Change Register */

#define DUART_ACR       0x04            /* Auxiliary Control Register */

#define DUART_ISR       0x05            /* Interrupt Status Register */

#define DUART_IMR       0x05            /* Interrupt Mask Register */

#define DUART_CUR       0x06            /* Counter Mode: current MSB */

#define DUART_CTUR      0x06            /* Counter/Timer upper reg */

#define DUART_CLR       0x07            /* Counter Mode: current LSB */

#define DUART_CTLR      0x07            /* Counter/Timer lower reg */

#define DUART_MR1B      0x08            /* Mode Register B */

#define DUART_MR2B      0x08            /* Mode Register B */

#define DUART_SRB       0x09            /* Status Register B */

#define DUART_CSRB      0x09            /* Clock-Select Register B */

#define DUART_CRB       0x0A            /* Command Register B */

#define DUART_RBB       0x0B            /* Receive Buffer B */

#define DUART_TBB       0x0B            /* Transmit Buffer A */

#define DUART_IVR       0x0C            /* Interrupt Vector Register */

#define DUART_IP        0x0D            /* Input Port */

#define DUART_OPCR      0x0D            /* Output Port Configuration Reg. */

#define DUART_STRTCC    0x0E            /* Start-Counter command */

#define DUART_OPRSET    0x0E            /* Output Port Reg, SET bits */

#define DUART_STOPCC    0x0F            /* Stop-Counter command */

#define DUART_OPRRST    0x0F            /* Output Port Reg, ReSeT bits */