132 lines
2.0 KiB
C
132 lines
2.0 KiB
C
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#include <stdio.h>
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#include <time.h>
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#include "defs.h"
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#include "mem.h"
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#include "rtc.h"
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#include "rc.h"
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struct rtc rtc;
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static int syncrtc = 1;
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rcvar_t rtc_exports[] =
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{
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RCV_BOOL("syncrtc", &syncrtc),
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RCV_END
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};
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void rtc_latch(byte b)
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{
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if ((rtc.latch ^ b) & b & 1)
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{
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rtc.regs[0] = rtc.s;
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rtc.regs[1] = rtc.m;
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rtc.regs[2] = rtc.h;
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rtc.regs[3] = rtc.d;
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rtc.regs[4] = (rtc.d>>9) | (rtc.stop<<6) | (rtc.carry<<7);
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rtc.regs[5] = 0xff;
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rtc.regs[6] = 0xff;
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rtc.regs[7] = 0xff;
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}
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rtc.latch = b;
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}
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void rtc_write(byte b)
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{
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/* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */
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if (!(rtc.sel & 8)) return;
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switch (rtc.sel & 7)
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{
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case 0:
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rtc.s = rtc.regs[0] = b;
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while (rtc.s >= 60) rtc.s -= 60;
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break;
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case 1:
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rtc.m = rtc.regs[1] = b;
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while (rtc.m >= 60) rtc.m -= 60;
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break;
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case 2:
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rtc.h = rtc.regs[2] = b;
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while (rtc.h >= 24) rtc.h -= 24;
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break;
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case 3:
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rtc.regs[3] = b;
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rtc.d = (rtc.d & 0x100) | b;
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break;
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case 4:
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rtc.regs[4] = b;
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rtc.d = (rtc.d & 0xff) | ((b&1)<<9);
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rtc.stop = (b>>6)&1;
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rtc.carry = (b>>7)&1;
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break;
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}
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}
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void rtc_tick()
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{
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if (rtc.stop) return;
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if (++rtc.t == 60)
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{
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if (++rtc.s == 60)
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{
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if (++rtc.m == 60)
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{
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if (++rtc.h == 24)
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{
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if (++rtc.d == 365)
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{
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rtc.d = 0;
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rtc.carry = 1;
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}
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rtc.h = 0;
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}
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rtc.m = 0;
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}
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rtc.s = 0;
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}
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rtc.t = 0;
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}
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}
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void rtc_save_internal(FILE *f)
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{
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fprintf(f, "%d %d %d %02d %02d %02d %02d\n%d\n",
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rtc.carry, rtc.stop, rtc.d, rtc.h, rtc.m, rtc.s, rtc.t,
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time(0));
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}
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void rtc_load_internal(FILE *f)
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{
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int rt = 0;
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fscanf(
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f, "%d %d %d %02d %02d %02d %02d\n%d\n",
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&rtc.carry, &rtc.stop, &rtc.d,
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&rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt);
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while (rtc.t >= 60) rtc.t -= 60;
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while (rtc.s >= 60) rtc.s -= 60;
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while (rtc.m >= 60) rtc.m -= 60;
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while (rtc.h >= 24) rtc.h -= 24;
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while (rtc.d >= 365) rtc.d -= 365;
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rtc.stop &= 1;
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rtc.carry &= 1;
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if (rt) rt = (time(0) - rt) * 60;
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if (syncrtc) while (rt-- > 0) rtc_tick();
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}
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