mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
1a63d7e08e
- better 8250 emulation; - fake vertical retrace bit in Input Status #1 register (this was lost in the VGA emu rewrite). Submitted by: Igor Serikov <bt@turtle.pangeatech.com>
135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
/*
|
|
* Copyright (c) 1992, 1993, 1996
|
|
* Berkeley Software Design, Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Berkeley Software
|
|
* Design, Inc.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* BSDI com.h,v 2.2 1996/04/08 19:32:21 bostic Exp
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/* com.h for doscmd int14.c */
|
|
|
|
/* NS16550A register definitions */
|
|
|
|
/* interrupt enable register */
|
|
|
|
#define IE_NOP 0xF0 /* Not used */
|
|
#define IE_MODEM_STAT 0x08 /* modem status int. */
|
|
#define IE_LINE_STAT 0x04 /* receiver-line status int. */
|
|
#define IE_TRANS_HLD 0x02 /* transmitter holding register empty int. */
|
|
#define IE_RCV_DATA 0x01 /* received data available int. */
|
|
|
|
/* interrupt identification register */
|
|
|
|
#define II_FIFOS_EN 0xC0 /* if FIFOs are enabled */
|
|
#define II_NOP 0x30 /* not used */
|
|
#define II_INT_ID 0x0E /* mask: bits see below */
|
|
#define II_PEND_INT 0x01 /* 1=no interrupt pending */
|
|
|
|
/* bit masks for II_INT_ID */
|
|
|
|
#define II_TO 0x0C
|
|
#define II_LINE_STAT 0x06
|
|
#define II_RCV_DATA 0x04
|
|
#define II_TRANS_HLD 0x02
|
|
#define II_MODEM_STAT 0x00
|
|
|
|
/* FIFO control reg */
|
|
|
|
#define FC_FIFO_SZ_MASK 0xC0
|
|
#define FC_FIFO_1B 0x80
|
|
#define FC_FIFO_4B 0x40
|
|
#define FC_FIFO_8B 0x80
|
|
#define FC_FIFO_14B 0xC0
|
|
#define FC_FIFO_CTR 0x04
|
|
#define FC_FIFO_CRV 0x02
|
|
#define FC_FIFO_EN 0x01
|
|
|
|
/* line control register */
|
|
|
|
#define LC_DIV_ACC 0x80 /* divisor latch access bit */
|
|
#define LC_BRK_CTRL 0x40 /* set break control */
|
|
#define LC_S_PAR 0x20 /* stick parity */
|
|
#define LC_EVEN_P 0x10 /* even parity select */
|
|
#define LC_PAR_E 0x08 /* parity enable */
|
|
#define LC_STOP_B 0x04 /* number of stop bits (0 - 1 bit) */
|
|
#define LC_W_LEN 0x03 /* unsigned short length (00 - 5, 01 - 6 etc.) */
|
|
|
|
/* line status register */
|
|
|
|
#define LS_NOP 0x80 /* not used */
|
|
#define LS_X_DATA_E 0x40 /* 1=empty */
|
|
#define LS_X_HOLD_E 0x20 /* 1=empty */
|
|
#define LS_BREAK 0x10 /* break received */
|
|
#define LS_FRM_ERR 0x08 /* framing error */
|
|
#define LS_PAR_ERR 0x04 /* parity error */
|
|
#define LS_OVRN_ERR 0x02 /* overrun error */
|
|
#define LS_RCV_DATA_RD 0x01 /* data received */
|
|
|
|
/* modem status register */
|
|
|
|
#define MS_DCD 0x80 /* Data Carrier Detect in */
|
|
#define MS_RI 0x40 /* Ring Indicator in */
|
|
#define MS_DSR 0x20 /* Data Set Ready in */
|
|
#define MS_CTS 0x10 /* Clear To Send in */
|
|
#define MS_DELTA_DCD 0x08 /* Data Carrier Detect changed state */
|
|
#define MS_DELTA_RI 0x04 /* Ring Indicator changed state */
|
|
#define MS_DELTA_DSR 0x02 /* Data Set Ready changed state */
|
|
#define MS_DELTA_CTS 0x01 /* Clear To Send changed state */
|
|
|
|
/* DOS definitions -- parameters */
|
|
|
|
#define BITRATE_110 0x00
|
|
#define BITRATE_150 0x20
|
|
#define BITRATE_300 0x40
|
|
#define BITRATE_600 0x60
|
|
#define BITRATE_1200 0x80
|
|
#define BITRATE_2400 0xA0
|
|
#define BITRATE_4800 0xC0
|
|
#define BITRATE_9600 0xE0
|
|
#define PARITY_NONE 0x00
|
|
#define PARITY_ODD 0x08
|
|
#define PARITY_EVEN 0x18
|
|
#define STOPBIT_1 0x00
|
|
#define STOPBIT_2 0x04
|
|
#define TXLEN_7BITS 0x02
|
|
#define TXLEN_8BITS 0x03
|
|
|
|
#define N_OF_COM_REGS 8
|
|
|
|
/* DOS definitions -- return codes */
|
|
|
|
#define LS_SW_TIME_OUT LS_NOP /* return value used by DOS */
|
|
|
|
/* routine declarations */
|
|
|
|
void int14(regcontext_t *REGS);
|
|
void init_com(int, char *, int, unsigned char);
|
|
|
|
/* end of file com.h */
|