90c38ed200
a group of dos emulator developers. Submitted by: Jonathan Lemon <jlemon@americantv.com> Obtained from: BSDI
168 lines
5.7 KiB
C
168 lines
5.7 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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* $Id: com.h,v 1.3 1996/09/22 15:42:48 miff Exp $
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*/
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/* com.h for doscmd int14.c */
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#define BUFSIZE 1024
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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 0x38 /* not used */
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#define II_INT_ID 0x06 /* 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_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_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_SHFT_E 0x40 /* 0=data transfer, 1=transmitter idle */
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#define LS_X_HOLD_E 0x20 /* 0=ready, 1=transferring character */
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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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/* data structure definitions */
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#define N_OF_COM_REGS 8
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struct com_data_struct {
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int fd; /* BSD/386 file descriptor */
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char *path; /* BSD/386 pathname */
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int addr; /* ISA I/O address */
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unsigned char irq; /* ISA IRQ */
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unsigned char flags; /* some general software flags */
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struct queue *com_queue; /* XXX DEBUG obsolete MCL? */
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unsigned char div_latch[2]; /* mirror of 16550 R0':R1' read/write */
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unsigned char last_char_read; /* mirror of 16550 R0 read only */
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unsigned char int_enable; /* mirror of 16550 R1 read/write */
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unsigned char int_id; /* mirror of 16550 R2 read only */
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unsigned char fifo_ctrl; /* mirror of 16550 R2 write only */
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unsigned char line_ctrl; /* mirror of 16550 R3 read/write */
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unsigned char modem_ctrl; /* mirror of 16550 R4 read/write */
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unsigned char line_stat; /* mirror of 16550 R5 read/write */
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unsigned char modem_stat; /* mirror of 16550 R6 read/write */
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unsigned char uart_spare; /* mirror of 16550 R7 read/write */
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};
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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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/* DOS definitions -- return codes */
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#define LS_SW_TIME_OUT LS_NOP /* return value used by DOS */
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/* miscellaneous definitions */
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#define DIV_LATCH_LOW 0
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#define DIV_LATCH_HIGH 1
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#define DIV_LATCH_LOW_WRITTEN 0x01
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#define DIV_LATCH_HIGH_WRITTEN 0x02
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#define DIV_LATCH_BOTH_WRITTEN 0x03
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/* variable declarations */
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extern int errno;
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/* routine declarations */
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extern void int14(regcontext_t *REGS);
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extern void com_set_line(struct com_data_struct *, unsigned char, unsigned char);
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extern void init_com(int, char *, int, unsigned char);
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extern u_char com_port_in(int);
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extern void com_port_out(int, unsigned char);
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/* end of file com.h */
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