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Shareware Overload Trio 2
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Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
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dir31
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tnypl211.zip
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EX2.C
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C/C++ Source or Header
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1994-06-21
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4KB
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146 lines
/* ex2.c - example #2 */
#include <stdio.h>
#include <conio.h>
#include "modplay.h"
#ifdef __BORLANDC__
void waitvr(void)
{
asm mov dx,0x3da
l0: asm in al,dx
asm test al,8
asm jne l0
l1: asm in al,dx
asm test al,8
asm je l1
l2: asm in al,dx
asm test al,1
asm jne l2
}
void setborder(char n)
{
asm mov dx,0x3c0
asm mov al,0x31
asm out dx,al
asm mov al,[n]
asm out dx,al
}
void starttimer(void)
{
asm in al,0x61
asm or al,0x01
asm out 0x61,al
asm mov al,0xb4
asm out 0x43,al
asm mov al,0xff
asm out 0x42,al
asm out 0x42,al
}
unsigned short readtimer(void)
{
asm mov al,0xb0
asm out 0x43,al
asm in al,0x42
asm mov ah,al
asm in al,0x42
asm xchg al,ah
asm neg ax
return _AX;
}
#else
#pragma aux waitvr = " mov dx,3dah "\
"L0: "\
" in al,dx "\
" test al,8 "\
" jne L0 "\
"L1: "\
" in al,dx "\
" test al,8 "\
" je L1 "\
"L2: "\
" in al,dx "\
" test al,1 "\
" jne L2 " parm caller [] modify [ax dx];
#pragma aux setborder = " mov dx,3c0h "\
" mov al,31h "\
" out dx,al "\
" mov al,ah "\
" out dx,al " parm caller [ah] modify [ax dx];
#pragma aux starttimer= " in al,61h "\
" or al,01h "\
" out 61h,al "\
" mov al,0b4h "\
" out 43h,al "\
" mov al,0ffh "\
" out 42h,al "\
" out 42h,al " parm caller [] modify [ax];
#pragma aux readtimer = " mov al,0b0h "\
" out 43h,al "\
" in al,42h "\
" mov ah,al "\
" in al,42h "\
" xchg al,ah "\
" neg ax " parm caller [] modify [ax];
void waitvr(void);
void setborder(char n);
void starttimer(void);
unsigned short readtimer(void);
#endif
void main(void)
{
Module *Song;
word Port;
byte IRQ,DRQ;
unsigned long counter,frames;
unsigned short ticks;
if (MODDetectCard(&Port,&IRQ,&DRQ)) {
printf("Sound Blaster not found.\n");
return;
}
printf("Sound Blaster found at Addr:%03x IRQ:%d DMA:%d\n",Port,IRQ,DRQ);
if ((Song = MODLoadModule("TUNE.MOD")) != NULL) {
if (MODPlayModule(Song,8,22222,Port,IRQ,DRQ,PM_MANUAL))
printf("Error initializing the sound system.\n");
else {
printf("Press any key to stop ...\n");
for (frames = counter = 0; !kbhit(); frames++) {
waitvr();
setborder(1);
starttimer();
MODPoll();
ticks = readtimer();
setborder(0);
counter += (unsigned long)ticks;
printf("%5u ticks\r", ticks);
}
MODStopModule();
if (frames) {
printf("%10lu frames\n%10lu ticks per frame (average)\n",
frames, counter/frames);
printf("%4.5f microseconds per frame (average)\n",
(((float)counter/(float)frames) / 1193182.0) * 1000000.0);
printf("\nNOTE: In my 386DX-40 i got 1150us per frame for the 8 channels module.\n");
}
}
MODFreeModule(Song);
}
else {
printf("Error loading modulefile.\n");
}
return;
}