static void
renderCoordinatesAlphabetic (unsigned char *cell, int column, int row) {
/* the coordinates are presented as an underlined letter as the Alva DOS TSR */
if (!SCR_COORDINATES_OK(column, row)) {
*cell = convertCharacterToDots(textTable, WC_C('z'));
} else {
const int32_t height = 25;
const int32_t frequency = row / height;
if (frequency) {
const int32_t interval = NSECS_PER_SEC / (frequency * 2);
TimeValue time;
getMonotonicTime(&time);
scheduleUpdateIn("alva status field",
(((interval - (time.nanoseconds % interval)) / NSECS_PER_MSEC) + 1));
if (!((time.nanoseconds / interval) % 2)) {
*cell = 0;
return;
}
}
*cell = convertCharacterToDots(textTable, ((row % height) + WC_C('a')))
| ((column / textCount) << 6);
}
}
static void
renderStatusField_time (unsigned char *cells) {
TimeValue value;
TimeComponents components;
getCurrentTime(&value);
scheduleUpdateIn("time status field", millisecondsTillNextMinute(&value));
expandTimeValue(&value, &components);
renderNumberUpper(cells, components.hour);
renderNumberLower(cells, components.minute);
}
void
mainScreenUpdated (void) {
if (isMainScreen()) {
scheduleUpdateIn("main screen updated", SCREEN_UPDATE_SCHEDULE_DELAY);
}
}