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Default to 24-hour mode.

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This commit is contained in:
Thomas Harte 2023-12-24 17:37:52 -05:00
parent e0a07ad22f
commit f58ab0d00d
1 changed files with 8 additions and 5 deletions
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13
Machines/PCCompatible/RTC.hpp
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@ -43,12 +43,11 @@ class RTC {
case 0x03: return 0; // Minutes alarm
case 0x04:
// Hours [1-12 or 0-23]
if(statusB_ & 2) {
if(is_24hour()) {
return bcd(time_date->tm_hour);
}
return
// TODO: determine why GLaTICK signals an RTC fault if I enable communication of PM as below.
// ((time_date->tm_hour >= 12) ? 0x80 : 0x00) |
((time_date->tm_hour >= 12) ? 0x80 : 0x00) |
bcd(1 + (time_date->tm_hour + 11)%12);
break;
case 0x05: return 0; // Hours alarm
@ -67,12 +66,15 @@ class RTC {
int selected_;
uint8_t statusA_ = 0x00;
uint8_t statusB_ = 0x00;
uint8_t statusB_ = 0x02;
bool is_decimal() const { return statusB_ & 0x04; }
bool is_24hour() const { return statusB_ & 0x02; }
template <typename IntT>
uint8_t bcd(IntT input) {
// If calendar is in binary format, don't convert.
if(statusB_ & 4) {
if(is_decimal()) {
return uint8_t(input);
}
@ -87,6 +89,7 @@ class RTC {
switch(selected_) {
default: break;
case 0x0a: statusA_ = value; break;
case 0x0b: statusB_ = value; break;
}
}
};