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Clear all registers before starting to play.

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Subversion-branch: /research
Subversion-revision: 1483
This commit is contained in:
Simon Howard 2009-03-15 21:55:10 +00:00
parent a880926d22
commit a0973c9ef7
1 changed files with 19 additions and 5 deletions
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24
opl/droplay/droplay.c
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@ -13,17 +13,28 @@ void write_reg(unsigned int reg, unsigned int val)
outb(reg, ADLIB_PORT); outb(reg, ADLIB_PORT);
for (i=0; i<6; ++i) { for (i=0; i<6; ++i)
{
inb(ADLIB_PORT); inb(ADLIB_PORT);
} }
outb(val, ADLIB_PORT + 1); outb(val, ADLIB_PORT + 1);
for (i=0; i<35; ++i) { for (i=0; i<35; ++i)
{
inb(ADLIB_PORT); inb(ADLIB_PORT);
} }
} }
void clear_all_regs(void)
{
int i;
for (i=0; i<=0xff; ++i)
{
write_reg(i, 0x00);
}
}
void init(void) void init(void)
{ {
@ -38,7 +49,7 @@ void init(void)
int val1 = inb(ADLIB_PORT) & 0xe0; int val1 = inb(ADLIB_PORT) & 0xe0;
write_reg(2, 0xff); write_reg(2, 0xff);
write_reg(4, 0x21); write_reg(4, 0x21);
sleep(1); usleep(50);
int val2 = inb(ADLIB_PORT) & 0xe0; int val2 = inb(ADLIB_PORT) & 0xe0;
write_reg(4, 0x60); write_reg(4, 0x60);
write_reg(4, 0x80); write_reg(4, 0x80);
@ -96,15 +107,18 @@ void play_file(char *filename)
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
init();
if (argc < 2) if (argc < 2)
{ {
printf("Usage: %s <filename>\n", argv[0]); printf("Usage: %s <filename>\n", argv[0]);
exit(-1); exit(-1);
} }
init();
clear_all_regs();
sleep(1);
play_file(argv[1]); play_file(argv[1]);
clear_all_regs();
} }