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mc146818: remove hacks [Hans Ostermeyer]

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This commit is contained in:
R. Belmont 2011-08-13 21:00:35 +00:00
parent 7dfc3b4799
commit d10d6f0851
1 changed files with 4 additions and 30 deletions
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34
src/emu/machine/mc146818.c
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@ -5,7 +5,7 @@
Implementation of the MC146818 chip
Real time clock chip with battery buffered ram (or CMOS)
Used in IBM PC/AT, several PC clones, Amstrad NC200
Used in IBM PC/AT, several PC clones, Amstrad NC200, Apollo workstations
Nathan Woods (npwoods@mess.org)
Peter Trauner (peter.trauner@jk.uni-linz.ac.at)
@ -196,32 +196,9 @@ void mc146818_device::device_timer(emu_timer &timer, device_timer_id id, int par
return;
}
if (m_type == MC146818_UTC) {
// hack: set correct real time even for overloaded emulation
// (at least for apollo)
static osd_ticks_t t0 = 0;
osd_ticks_t t1 = osd_ticks();
int n_seconds;
if (t0 == 0) {
t0 = t1;
}
n_seconds = (t1 - t0) / osd_ticks_per_second();
t0 = t1 - (t1 - t0) % osd_ticks_per_second();
if (n_seconds <= 0) {
// we were called to early
return;
}
m_data[0] += n_seconds;
} else {
m_data[0] += 1;
}
if (BCD_MODE)
{
m_data[0]=bcd_adjust(m_data[0]/*+1*/);
m_data[0]=bcd_adjust(m_data[0]+1);
if (m_data[0]>=0x60)
{
m_data[0]=0;
@ -264,10 +241,10 @@ void mc146818_device::device_timer(emu_timer &timer, device_timer_id id, int par
}
else
{
/*m_data[0]=m_data[0]+1;*/
m_data[0]=m_data[0]+1;
if (m_data[0]>=60)
{
m_data[0] -= 60;
m_data[0]=0;
m_data[2]=m_data[2]+1;
if (m_data[2]>=60) {
m_data[2]=0;
@ -403,9 +380,6 @@ void mc146818_device::set_base_datetime()
current_time = (m_type == MC146818_UTC) ? systime.utc_time: systime.local_time;
// temporary hack to go back 20 year (e.g. from 2010 -> 1990)
// current_time.year -= 20;
// logerror("mc146818_set_base_datetime %02d/%02d/%02d %02d:%02d:%02d\n",
// current_time.year % 100, current_time.month + 1, current_time.mday,
// current_time.hour,current_time.minute, current_time.second);