1 /* Remote serial interface for GO32
2 Copyright 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25 #define SIGNATURE 0x4154
31 #define dprintf if(0)printf
35 #define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
49 static ASYNC_STRUCT far *async;
62 static int mono_pos=0;
66 void mono_put(char byte, char attr)
68 ScreenSecondary[320+mono_pos+80] = 0x0720;
69 ScreenSecondary[320+mono_pos] = (attr<<8) | (byte&0xff);
70 mono_pos = (mono_pos+1) % 1200;
75 static char far *aptr(short p)
78 return (char *)((unsigned)async - OFFSET + p);
80 return (char far *)MK_FP(FP_SEG(async), p);
84 static ASYNC_STRUCT far *getivec(int which)
88 if (peek(0, which*4) != OFFSET)
91 a = (ASYNC_STRUCT *)(0xe0000000 + peek(0, which*4+2)*16 + peek(0, which*4));
94 a = (ASYNC_STRUCT far *)MK_FP(peek(0,which*4+2),peek(0,which*4));
96 if (a->signature != SIGNATURE)
98 if (a->version != VERSION)
106 ASYNC_STRUCT far *a1;
107 ASYNC_STRUCT far *a2;
124 error("GDB can not connect to asynctsr program, check that it is installed\n\
125 and that serial I/O is not being redirected (perhaps by NFS)\n\n\
126 example configuration:\n\
127 C> mode com2:9600,n,8,1,p\n\
133 outportb(com_ier, 0x0f);
134 outportb(com_bfr, 0x03);
135 outportb(com_mcr, 0x0b);
136 async->getp = async->putp = async->buffer_start;
139 for (i=0; i<1200; i++)
140 ScreenSecondary[320+i] = 0x0720;
150 dprintf("dos_async_tx: enter %x - with IOV %x", c, com_lsr);
152 while (~inportb(com_lsr) & 0x20);
155 mono_put(c, mono_tx);
160 int dos_async_ready()
162 return (async->getp != async->putp);
168 dprintf("dos_async_rx: enter - ");
170 while (!dos_async_ready())
176 dprintf("async=%x getp=%x\n", async, async->getp);
178 rv = *aptr(async->getp++);
180 mono_put(rv, mono_rx);
182 if (async->getp >= async->buffer_end)
183 async->getp = async->buffer_start;
184 dprintf("exit %x\n", rv);
190 return (peek(0x40,0x1a) != peek(0x40,0x1c));
202 int dosasync_read(int fd, char *buffer, int length, int timeout)
208 dprintf("dosasync_read: enter(%d,%d)\n", length, timeout);
213 while (!dos_async_ready())
218 dprintf("dosasync_read: timeout(%d)\n", length-l-1);
223 *buffer++ = dos_async_rx();
225 dprintf("dosasync_read: exit %d\n", length);
229 int dosasync_write(int fd, CONST char *buffer, int length)
233 dos_async_tx(*buffer++);
239 char *strlwr(char *s)
244 if ((*s >= 'A') && (*s <= 'Z'))
259 DEFUN_VOID(serial_default_name)
266 DEFUN_VOID(serial_raw)
268 /* Always in raw mode */
273 DEFUN(serial_open,(name),
276 fd = dos_async_init();
282 DEFUN(serial_timedreadchar,(to, ok),
287 if ( dosasync_read(fd, &buf, 1, to))
299 DEFUN(serial_setbaudrate,(rate),
306 DEFUN(serial_nextbaudrate,(rate),
313 DEFUN(serial_write,(str, len),
317 dosasync_write(fd, str, len);
321 DEFUN_VOID(serial_close)