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Update RTC emulation 

- Based on notes, gpSP's RTC does was based on vba.
- I've updated relevant sections of it based on latest vba.

reference issue: https://github.com/libretro/gpsp/issues/79
This commit is contained in:
negativeExponent 2020-10-09 15:14:19 +08:00
parent 9fc166ebb2
commit f8b598a2ed
1 changed files with 10 additions and 10 deletions
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20
gba_memory.c
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@ -1682,7 +1682,14 @@ s32 rtc_bit_count;
static u32 encode_bcd(u8 value)
{
return ((value / 10) << 4) | (value % 10);
int l = 0;
int h = 0;
value = value % 100;
l = value % 10;
h = value / 10;
return h * 16 + l;
}
#define write_rtc_register(index, _value) \
@ -1773,23 +1780,16 @@ void write_rtc(u32 address, u32 value)
{
struct tm *current_time;
time_t current_time_flat;
u32 day_of_week;
time(&current_time_flat);
current_time = localtime(&current_time_flat);
day_of_week = current_time->tm_wday;
if(day_of_week == 0)
day_of_week = 6;
else
day_of_week--;
rtc_state = RTC_OUTPUT_DATA;
rtc_data_bytes = 7;
rtc_data[0] = encode_bcd(current_time->tm_year % 100);
rtc_data[0] = encode_bcd(current_time->tm_year);
rtc_data[1] = encode_bcd(current_time->tm_mon + 1);
rtc_data[2] = encode_bcd(current_time->tm_mday);
rtc_data[3] = encode_bcd(day_of_week);
rtc_data[3] = encode_bcd(current_time->tm_wday);
rtc_data[4] = encode_bcd(current_time->tm_hour);
rtc_data[5] = encode_bcd(current_time->tm_min);
rtc_data[6] = encode_bcd(current_time->tm_sec);