b80ee741e4
- 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
/*
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI com.h,v 2.2 1996/04/08 19:32:21 bostic Exp
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*
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* $FreeBSD$
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*/
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/* com.h for doscmd int14.c */
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/* NS16550A register definitions */
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/* interrupt enable register */
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#define IE_NOP 0xF0 /* Not used */
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#define IE_MODEM_STAT 0x08 /* modem status int. */
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#define IE_LINE_STAT 0x04 /* receiver-line status int. */
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#define IE_TRANS_HLD 0x02 /* transmitter holding register empty int. */
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#define IE_RCV_DATA 0x01 /* received data available int. */
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/* interrupt identification register */
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#define II_FIFOS_EN 0xC0 /* if FIFOs are enabled */
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#define II_NOP 0x30 /* not used */
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#define II_INT_ID 0x0E /* mask: bits see below */
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#define II_PEND_INT 0x01 /* 1=no interrupt pending */
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/* bit masks for II_INT_ID */
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#define II_TO 0x0C
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#define II_LINE_STAT 0x06
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#define II_RCV_DATA 0x04
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#define II_TRANS_HLD 0x02
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#define II_MODEM_STAT 0x00
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/* FIFO control reg */
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#define FC_FIFO_SZ_MASK 0xC0
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#define FC_FIFO_1B 0x80
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#define FC_FIFO_4B 0x40
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#define FC_FIFO_8B 0x80
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#define FC_FIFO_14B 0xC0
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#define FC_FIFO_CTR 0x04
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#define FC_FIFO_CRV 0x02
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#define FC_FIFO_EN 0x01
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/* line control register */
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#define LC_DIV_ACC 0x80 /* divisor latch access bit */
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#define LC_BRK_CTRL 0x40 /* set break control */
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#define LC_S_PAR 0x20 /* stick parity */
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#define LC_EVEN_P 0x10 /* even parity select */
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#define LC_PAR_E 0x08 /* parity enable */
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#define LC_STOP_B 0x04 /* number of stop bits (0 - 1 bit) */
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#define LC_W_LEN 0x03 /* unsigned short length (00 - 5, 01 - 6 etc.) */
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/* line status register */
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#define LS_NOP 0x80 /* not used */
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#define LS_X_DATA_E 0x40 /* 1=empty */
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#define LS_X_HOLD_E 0x20 /* 1=empty */
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#define LS_BREAK 0x10 /* break received */
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#define LS_FRM_ERR 0x08 /* framing error */
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#define LS_PAR_ERR 0x04 /* parity error */
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#define LS_OVRN_ERR 0x02 /* overrun error */
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#define LS_RCV_DATA_RD 0x01 /* data received */
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/* modem status register */
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#define MS_DCD 0x80 /* Data Carrier Detect in */
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#define MS_RI 0x40 /* Ring Indicator in */
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#define MS_DSR 0x20 /* Data Set Ready in */
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#define MS_CTS 0x10 /* Clear To Send in */
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#define MS_DELTA_DCD 0x08 /* Data Carrier Detect changed state */
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#define MS_DELTA_RI 0x04 /* Ring Indicator changed state */
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#define MS_DELTA_DSR 0x02 /* Data Set Ready changed state */
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#define MS_DELTA_CTS 0x01 /* Clear To Send changed state */
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/* DOS definitions -- parameters */
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#define BITRATE_110 0x00
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#define BITRATE_150 0x20
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#define BITRATE_300 0x40
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#define BITRATE_600 0x60
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#define BITRATE_1200 0x80
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#define BITRATE_2400 0xA0
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#define BITRATE_4800 0xC0
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#define BITRATE_9600 0xE0
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#define PARITY_NONE 0x00
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#define PARITY_ODD 0x08
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#define PARITY_EVEN 0x18
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#define STOPBIT_1 0x00
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#define STOPBIT_2 0x04
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#define TXLEN_7BITS 0x02
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#define TXLEN_8BITS 0x03
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#define N_OF_COM_REGS 8
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/* DOS definitions -- return codes */
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#define LS_SW_TIME_OUT LS_NOP /* return value used by DOS */
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/* routine declarations */
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void int14(regcontext_t *REGS);
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void init_com(int, char *, int, unsigned char);
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/* end of file com.h */
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