3 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/i8254.h>
28 #define TIMER2_VALUE 0x0a8e /* 440Hz */
30 int pcat_timer_init(void)
33 * initialize 2, used to drive the speaker
34 * (to start a beep: write 3 to port 0x61,
35 * to stop it again: write 0)
37 outb(PIT_CMD_CTR2 | PIT_CMD_BOTH | PIT_CMD_MODE3,
38 PIT_BASE + PIT_COMMAND);
39 outb(TIMER2_VALUE & 0xff, PIT_BASE + PIT_T2);
40 outb(TIMER2_VALUE >> 8, PIT_BASE + PIT_T2);