36 lines
746 B
C
36 lines
746 B
C
#include <stdio.h>
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#include <dos.h>
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int delays = 0;
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volatile int clock_ticks;
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void (__interrupt __far *prev_int_1c)( void );
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#define BLIP_COUNT (5*18) /* 5 seconds */
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void __interrupt __far timer_rtn( void )
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{
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++clock_ticks;
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_chain_intr( prev_int_1c );
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}
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int compile_a_line( void )
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{
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if( delays > 15 ) return( 0 );
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delay( 1000 ); /* delay for 1 second */
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printf( "Delayed for 1 second\n" );
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delays++;
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return( 1 );
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}
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void main( void )
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{
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prev_int_1c = _dos_getvect( 0x1c );
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_dos_setvect( 0x1c, timer_rtn );
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while( compile_a_line() ) {
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if( clock_ticks >= BLIP_COUNT ) {
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putchar( '.' );
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clock_ticks -= BLIP_COUNT;
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}
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}
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_dos_setvect( 0x1c, prev_int_1c );
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}
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