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51 lines
912 B
C
51 lines
912 B
C
/*
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** No copyright?!
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**
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** $FreeBSD$
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*/
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#include "doscmd.h"
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static void
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int08(regcontext_t *REGS)
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{
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softint(0x1c);
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}
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static void
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int1c(regcontext_t *REGS)
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{
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}
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unsigned char timer;
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static u_char
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inb_timer(int port)
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{
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return (--timer);
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}
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void
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timer_init(void)
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{
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u_long vec;
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struct itimerval itv;
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vec = insert_hardint_trampoline();
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ivec[0x08] = vec;
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register_callback(vec, int08, "int 08");
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vec = insert_softint_trampoline();
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ivec[0x1c] = vec;
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register_callback(vec, int1c, "int 1c");
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define_input_port_handler(0x42, inb_timer);
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define_input_port_handler(0x40, inb_timer);
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itv.it_interval.tv_sec = 0;
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itv.it_interval.tv_usec = 54925; /* 1193182/65536 times per second */
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itv.it_value.tv_sec = 0;
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itv.it_value.tv_usec = 54925; /* 1193182/65536 times per second */
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if (! timer_disable)
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setitimer(ITIMER_REAL, &itv, 0);
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}
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