rtcin
key = rtcin(IBM_RTC_HOTKEY1);
key = rtcin(IBM_RTC_HOTKEY2);
key = rtcin(IBM_RTC_THINKLIGHT);
key = rtcin(IBM_RTC_SCREENEXPAND);
key = rtcin(IBM_RTC_BRIGHTNESS);
key = rtcin(IBM_RTC_VOLUME);
rtcin(RTC_EQUIPMENT), readb(BIOS_PADDRTOVADDR(0x488)));
switch ((rtcin(RTC_EQUIPMENT) >> 4) & 3) { /* bit 4 and 5 */
fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
v = rtcin(nv_off);
sum = rtcin(NVRAM_FIRST + CKSUM_MSB) << 8 |
rtcin(NVRAM_FIRST + CKSUM_LSB);
sum -= rtcin(NVRAM_FIRST + i);
sum += rtcin(NVRAM_FIRST + i);
extmem = rtcin(RTC_EXTLO) + (rtcin(RTC_EXTHI) << 8);
int rtcin(int reg);
while (rtcin(RTC_INTR) & RTCIR_PERIOD) {
*ptr++ = rtcin(reg++) & 0xff;
if (!(rtcin(RTC_STATUSD) & RTCSD_PWR)) {
while (rtcin(RTC_STATUSA) & RTCSA_TUP)