490 lines
16 KiB
C
490 lines
16 KiB
C
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#include <stdio.h>
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#include "ibm.h"
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#include "io.h"
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#include "nvr.h"
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#include "pic.h"
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#include "timer.h"
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int oldromset;
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int nvrmask=63;
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uint8_t nvrram[128];
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int nvraddr;
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int nvr_dosave = 0;
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static int nvr_onesec_time = 0, nvr_onesec_cnt = 0;
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int enable_sync = 0;
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#define second internal_time[0]
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#define minute internal_time[1]
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#define hour internal_time[2]
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#define day internal_time[3]
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#define month internal_time[4]
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#define year internal_time[5]
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int internal_time[6];
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int days_in_month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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static int is_leap(int org_year)
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{
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if (org_year % 400 == 0) return 1;
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if (org_year % 100 == 0) return 0;
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if (org_year % 4 == 0) return 1;
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return 0;
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}
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static int get_days(int org_month, int org_year)
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{
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if (org_month != 2)
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{
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return days_in_month[org_month];
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}
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else
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{
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return is_leap(org_year) ? 29 : 28;
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}
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}
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static int convert_to_bcd(int number)
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{
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int n1, n2;
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n1 = number % 10;
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n2 = number - n1;
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n2 /= 10;
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n2 <<= 4;
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return (n2 | n1);
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}
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static int convert_from_bcd(int number)
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{
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int n1, n2;
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n1 = number & 0xF;
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n2 = number >> 4;
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n2 *= 10;
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return (n2 + n1);
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}
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static int final_form(int isbcd, int number)
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{
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return isbcd ? convert_to_bcd(number) : number;
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}
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static int original_form(int isbcd, int number)
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{
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return isbcd ? convert_from_bcd(number) : number;
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}
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static void nvr_recalc_clock()
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{
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if (second == 60)
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{
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second = 0;
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minute++;
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}
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if (minute == 60)
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{
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minute = 0;
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hour++;
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}
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if (hour == 24)
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{
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hour = 0;
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day++;
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}
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if (day == (get_days(month, year) + 1))
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{
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day = 1;
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month++;
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}
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if (month == 13)
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{
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month = 1;
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year++;
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}
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nvr_dosave = 1;
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}
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static void nvr_update_internal_clock()
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{
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second++;
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nvr_recalc_clock();
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}
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void nvr_add_10sec()
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{
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time_sleep(10000);
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if (!enable_sync)
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{
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second+=10;
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nvr_recalc_clock();
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}
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}
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static int to_12_hour(int org_hour)
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{
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int hour2 = org_hour;
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hour2 %= 12;
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if (!hour2) hour2 = 12;
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return hour2;
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}
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static int from_12_hour(int org_hour)
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{
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int hour2 = org_hour & 0x7F;
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if (hour2 == 12) hour2 = 0;
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if (hour & 0x80) hour2 += 12;
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return hour2;
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}
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static int week_day()
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{
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int day_of_month = day;
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int month2 = month;
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int year2 = year % 100;
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int century = ((year - year2) / 100) % 4;
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int sum = day_of_month + month2 + year2 + century;
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/* (sum mod 7) gives 0 for Saturday, we need it for Monday, so +5 */
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int raw_wd = ((sum + 5) % 7);
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/* +1 so 1 = Monday, 7 = Sunday */
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return raw_wd + 1;
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}
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/* Called on every get time. */
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static void set_registers()
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{
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int is24hour = (nvrram[0xB] & 2) ? 1 : 0;
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int isbcd = (nvrram[0xB] & 4) ? 0 : 1;
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uint8_t baknvr[10];
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memcpy(baknvr,nvrram,10);
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if (AMSTRAD)
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{
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is24hour = 1;
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isbcd = 1;
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}
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nvrram[0] = final_form(isbcd, second);
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nvrram[2] = final_form(isbcd, minute);
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nvrram[4] = is24hour ? final_form(isbcd, hour) : final_form(isbcd, to_12_hour(hour));
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nvrram[6] = week_day();
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nvrram[7] = final_form(isbcd, day);
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nvrram[8] = final_form(isbcd, month);
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nvrram[9] = final_form(isbcd, (year % 100));
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if (baknvr[0] != nvrram[0] ||
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baknvr[2] != nvrram[2] ||
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baknvr[4] != nvrram[4] ||
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baknvr[6] != nvrram[6] ||
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baknvr[7] != nvrram[7] ||
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baknvr[8] != nvrram[8] ||
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baknvr[9] != nvrram[9])
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nvrram[0xA]|=0x80;
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}
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/* Called on NVR load and write. */
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static void get_registers()
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{
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int is24hour = (nvrram[0xB] & 2) ? 1 : 0;
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int isbcd = (nvrram[0xB] & 4) ? 0 : 1;
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int temp_hour = 0;
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if (AMSTRAD)
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{
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is24hour = 1;
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isbcd = 1;
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}
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second = original_form(isbcd, nvrram[0]);
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minute = original_form(isbcd, nvrram[2]);
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hour = is24hour ? original_form(isbcd, nvrram[4]) : from_12_hour(original_form(isbcd, nvrram[4]));
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day = original_form(isbcd, nvrram[7]);
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month = original_form(isbcd, nvrram[8]);
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year = original_form(isbcd, nvrram[9]) + 1900;
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}
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void getnvrtime()
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{
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if (enable_sync)
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{
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/* Get time from host. */
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time_get(nvrram);
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}
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else
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{
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/* Get time from internal clock. */
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set_registers();
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}
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}
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void update_sync()
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{
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if (enable_sync)
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{
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/* Get time from host. */
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time_get(nvrram);
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}
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else
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{
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/* Save time to registers but keep it as is. */
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get_registers();
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}
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}
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void nvr_recalc()
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{
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int c;
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int newrtctime;
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c=1<<((nvrram[0xA]&0xF)-1);
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newrtctime=(int)(RTCCONST * c * (1 << TIMER_SHIFT));
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if (rtctime>newrtctime) rtctime=newrtctime;
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}
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void nvr_rtc(void *p)
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{
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int c;
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if (!(nvrram[0xA]&0xF))
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{
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rtctime=0x7fffffff;
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return;
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}
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c=1<<((nvrram[0xA]&0xF)-1);
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rtctime += (int)(RTCCONST * c * (1 << TIMER_SHIFT));
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// pclog("RTCtime now %f\n",rtctime);
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nvrram[0xC] |= 0x40;
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if (nvrram[0xB]&0x40)
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{
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nvrram[0xC]|=0x80;
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if (AMSTRAD) picint(2);
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else picint(0x100);
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// pclog("RTC int\n");
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}
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}
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void nvr_onesec(void *p)
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{
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nvr_onesec_cnt++;
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if (nvr_onesec_cnt >= 100)
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{
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nvr_onesec_cnt = 0;
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/* If sync is disabled, move internal clock ahead by 1 second. */
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if (!enable_sync) nvr_update_internal_clock();
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nvrram[0xC] |= 0x10;
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if (nvrram[0xB] & 0x10)
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{
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nvrram[0xC] |= 0x80;
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if (AMSTRAD) picint(2);
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else picint(0x100);
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}
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// pclog("RTC onesec\n");
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}
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nvr_onesec_time += (int)(10000 * TIMER_USEC);
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}
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void writenvr(uint16_t addr, uint8_t val, void *priv)
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{
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int c, old;
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// printf("Write NVR %03X %02X %02X %04X:%04X %i\n",addr,nvraddr,val,cs>>4,pc,ins);
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if (addr&1)
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{
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// if (nvraddr == 0x33) pclog("NVRWRITE33 %02X %04X:%04X %i\n",val,CS,pc,ins);
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old = nvrram[nvraddr];
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if (nvraddr >= 0xe && nvrram[nvraddr] != val)
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nvr_dosave = 1;
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// if (nvraddr==0xB) update_reg_0B(val);
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if (nvraddr!=0xC && nvraddr!=0xD) nvrram[nvraddr]=val;
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/* If not syncing the time with the host, we need to update our internal clock on write. */
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if (!enable_sync)
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{
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switch(nvraddr)
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{
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case 0:
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case 2:
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case 4:
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case 6:
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case 7:
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case 8:
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case 9:
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if (old != val)
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{
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get_registers();
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nvr_dosave = 1;
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}
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return;
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}
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}
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if (nvraddr==0xA)
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{
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// pclog("NVR rate %i\n",val&0xF);
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if (val&0xF)
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{
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c=1<<((val&0xF)-1);
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rtctime += (int)(RTCCONST * c * (1 << TIMER_SHIFT));
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}
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else
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rtctime = 0x7fffffff;
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}
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}
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else nvraddr=val&nvrmask;
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}
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uint8_t readnvr(uint16_t addr, void *priv)
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{
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uint8_t temp;
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// printf("Read NVR %03X %02X %02X %04X:%04X\n",addr,nvraddr,nvrram[nvraddr],cs>>4,pc);
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if (addr&1)
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{
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if (nvraddr<=0xA) getnvrtime();
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if (nvraddr==0xD) nvrram[0xD]|=0x80;
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if (nvraddr==0xA)
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{
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temp=nvrram[0xA];
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nvrram[0xA]&=~0x80;
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return temp;
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}
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if (nvraddr==0xC)
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{
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if (AMSTRAD) picintc(2);
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else picintc(0x100);
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temp=nvrram[0xC];
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nvrram[0xC]=0;
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return temp;
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}
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// if (AMIBIOS && nvraddr==0x36) return 0;
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// if (nvraddr==0xA) nvrram[0xA]^=0x80;
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return nvrram[nvraddr];
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}
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return nvraddr;
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}
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void loadnvr()
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{
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FILE *f;
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int c;
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nvrmask=63;
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oldromset=romset;
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switch (romset)
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{
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case ROM_PC1512: f = romfopen("nvr/pc1512.nvr", "rb"); break;
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case ROM_PC1640: f = romfopen("nvr/pc1640.nvr", "rb"); break;
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case ROM_PC200: f = romfopen("nvr/pc200.nvr", "rb"); break;
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case ROM_PC2086: f = romfopen("nvr/pc2086.nvr", "rb"); break;
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case ROM_PC3086: f = romfopen("nvr/pc3086.nvr", "rb"); break;
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case ROM_IBMAT: f = romfopen("nvr/at.nvr", "rb"); break;
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case ROM_IBMPS1_2011: f = romfopen("nvr/ibmps1_2011.nvr", "rb"); /*nvrmask = 127; */break;
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case ROM_IBMPS1_2121: f = romfopen("nvr/ibmps1_2121.nvr", "rb"); nvrmask = 127; break;
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case ROM_CMDPC30: f = romfopen("nvr/cmdpc30.nvr", "rb"); nvrmask = 127; break;
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case ROM_AMI286: f = romfopen("nvr/ami286.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_AWARD286: f = romfopen("nvr/award286.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_DELL200: f = romfopen("nvr/dell200.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_IBMAT386: f = romfopen("nvr/at386.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_DESKPRO_386: f = romfopen("nvr/deskpro386.nvr", "rb"); break;
|
||
|
|
case ROM_ACER386: f = romfopen("nvr/acer386.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_MEGAPC: f = romfopen("nvr/megapc.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_AMI386: f = romfopen("nvr/ami386.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_AMI486: f = romfopen("nvr/ami486.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_WIN486: f = romfopen("nvr/win486.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_PCI486: f = romfopen("nvr/hot-433.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_SIS496: f = romfopen("nvr/sis496.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_430VX: f = romfopen("nvr/430vx.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_REVENGE: f = romfopen("nvr/revenge.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_ENDEAVOR: f = romfopen("nvr/endeavor.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_PX386: f = romfopen("nvr/px386.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_DTK386: f = romfopen("nvr/dtk386.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_DTK486: f = romfopen("nvr/dtk486.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_R418: f = romfopen("nvr/r418.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_586MC1: f = romfopen("nvr/586mc1.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_PLATO: f = romfopen("nvr/plato.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_MB500N: f = romfopen("nvr/mb500n.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_P54TP4XE: f = romfopen("nvr/p54tp4xe.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_ACERM3A: f = romfopen("nvr/acerm3a.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_ACERV35N: f = romfopen("nvr/acerv35n.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_P55T2P4: f = romfopen("nvr/p55t2p4.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_P55TVP4: f = romfopen("nvr/p55tvp4.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_P55VA: f = romfopen("nvr/p55va.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_440FX: f = romfopen("nvr/440fx.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
case ROM_KN97: f = romfopen("nvr/kn97.nvr", "rb"); nvrmask = 127; break;
|
||
|
|
default: return;
|
||
|
|
}
|
||
|
|
if (!f)
|
||
|
|
{
|
||
|
|
memset(nvrram,0xFF,128);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
fread(nvrram,128,1,f);
|
||
|
|
if (!(feof(f)))
|
||
|
|
fread(internal_time,6,4,f);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (!enable_sync) get_registers();
|
||
|
|
}
|
||
|
|
fclose(f);
|
||
|
|
nvrram[0xA]=6;
|
||
|
|
nvrram[0xB]=0;
|
||
|
|
c=1<<((6&0xF)-1);
|
||
|
|
rtctime += (int)(RTCCONST * c * (1 << TIMER_SHIFT));
|
||
|
|
}
|
||
|
|
void savenvr()
|
||
|
|
{
|
||
|
|
FILE *f;
|
||
|
|
switch (oldromset)
|
||
|
|
{
|
||
|
|
case ROM_PC1512: f = romfopen("nvr/pc1512.nvr", "wb"); break;
|
||
|
|
case ROM_PC1640: f = romfopen("nvr/pc1640.nvr", "wb"); break;
|
||
|
|
case ROM_PC200: f = romfopen("nvr/pc200.nvr", "wb"); break;
|
||
|
|
case ROM_PC2086: f = romfopen("nvr/pc2086.nvr", "wb"); break;
|
||
|
|
case ROM_PC3086: f = romfopen("nvr/pc3086.nvr", "wb"); break;
|
||
|
|
case ROM_IBMAT: f = romfopen("nvr/at.nvr", "wb"); break;
|
||
|
|
case ROM_IBMPS1_2011: f = romfopen("nvr/ibmps1_2011.nvr", "wb"); break;
|
||
|
|
case ROM_IBMPS1_2121: f = romfopen("nvr/ibmps1_2121.nvr", "wb"); break;
|
||
|
|
case ROM_CMDPC30: f = romfopen("nvr/cmdpc30.nvr", "wb"); break;
|
||
|
|
case ROM_AMI286: f = romfopen("nvr/ami286.nvr", "wb"); break;
|
||
|
|
case ROM_AWARD286: f = romfopen("nvr/award286.nvr", "wb"); break;
|
||
|
|
case ROM_DELL200: f = romfopen("nvr/dell200.nvr", "wb"); break;
|
||
|
|
case ROM_IBMAT386: f = romfopen("nvr/at386.nvr", "wb"); break;
|
||
|
|
case ROM_DESKPRO_386: f = romfopen("nvr/deskpro386.nvr", "wb"); break;
|
||
|
|
case ROM_ACER386: f = romfopen("nvr/acer386.nvr", "wb"); break;
|
||
|
|
case ROM_MEGAPC: f = romfopen("nvr/megapc.nvr", "wb"); break;
|
||
|
|
case ROM_AMI386: f = romfopen("nvr/ami386.nvr", "wb"); break;
|
||
|
|
case ROM_AMI486: f = romfopen("nvr/ami486.nvr", "wb"); break;
|
||
|
|
case ROM_WIN486: f = romfopen("nvr/win486.nvr", "wb"); break;
|
||
|
|
case ROM_PCI486: f = romfopen("nvr/hot-433.nvr", "wb"); break;
|
||
|
|
case ROM_SIS496: f = romfopen("nvr/sis496.nvr", "wb"); break;
|
||
|
|
case ROM_430VX: f = romfopen("nvr/430vx.nvr", "wb"); break;
|
||
|
|
case ROM_REVENGE: f = romfopen("nvr/revenge.nvr", "wb"); break;
|
||
|
|
case ROM_ENDEAVOR: f = romfopen("nvr/endeavor.nvr", "wb"); break;
|
||
|
|
case ROM_PX386: f = romfopen("nvr/px386.nvr", "wb"); break;
|
||
|
|
case ROM_DTK386: f = romfopen("nvr/dtk386.nvr", "wb"); break;
|
||
|
|
case ROM_DTK486: f = romfopen("nvr/dtk486.nvr", "wb"); break;
|
||
|
|
case ROM_R418: f = romfopen("nvr/r418.nvr", "wb"); break;
|
||
|
|
case ROM_586MC1: f = romfopen("nvr/586mc1.nvr", "wb"); break;
|
||
|
|
case ROM_PLATO: f = romfopen("nvr/plato.nvr", "wb"); break;
|
||
|
|
case ROM_MB500N: f = romfopen("nvr/mb500n.nvr", "wb"); break;
|
||
|
|
case ROM_P54TP4XE: f = romfopen("nvr/p54tp4xe.nvr", "wb"); break;
|
||
|
|
case ROM_ACERM3A: f = romfopen("nvr/acerm3a.nvr", "wb"); break;
|
||
|
|
case ROM_ACERV35N: f = romfopen("nvr/acerv35n.nvr", "wb"); break;
|
||
|
|
case ROM_P55T2P4: f = romfopen("nvr/p55t2p4.nvr", "wb"); break;
|
||
|
|
case ROM_P55TVP4: f = romfopen("nvr/p55tvp4.nvr", "wb"); break;
|
||
|
|
case ROM_P55VA: f = romfopen("nvr/p55va.nvr", "wb"); break;
|
||
|
|
case ROM_440FX: f = romfopen("nvr/440fx.nvr", "wb"); break;
|
||
|
|
case ROM_KN97: f = romfopen("nvr/kn97.nvr", "wb"); break;
|
||
|
|
default: return;
|
||
|
|
}
|
||
|
|
/* If sync is disabled, save internal clock to registers. */
|
||
|
|
if (!enable_sync) set_registers();
|
||
|
|
fwrite(nvrram,128,1,f);
|
||
|
|
fwrite(internal_time,6,4,f);
|
||
|
|
fclose(f);
|
||
|
|
}
|
||
|
|
|
||
|
|
void nvr_init()
|
||
|
|
{
|
||
|
|
io_sethandler(0x0070, 0x0002, readnvr, NULL, NULL, writenvr, NULL, NULL, NULL);
|
||
|
|
timer_add(nvr_rtc, &rtctime, TIMER_ALWAYS_ENABLED, NULL);
|
||
|
|
timer_add(nvr_onesec, &nvr_onesec_time, TIMER_ALWAYS_ENABLED, NULL);
|
||
|
|
}
|