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[MSM6242] Fixing RTC regressions regarding interrupt callbacks

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This commit is contained in:
Nathan Woods 2012-12-23 05:28:04 +00:00
parent 6c22d2585b
commit 4eaee5d7d0
2 changed files with 40 additions and 3 deletions
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42
src/emu/machine/msm6242.c
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@ -41,8 +41,9 @@ enum
#define TIMER_RTC_CALLBACK 1
#define LOG_UNMAPPED 1
#define LOG_IRQ 1
#define LOG_UNMAPPED 0
#define LOG_IRQ 0
#define LOG_IRQ_ENABLE 0
@ -316,7 +317,17 @@ void msm6242_device::update_timer()
// if set, convert ticks to an attotime
if (callback_ticks > 0)
{
callback_time = attotime::from_ticks(callback_ticks, clock()) - machine().time();
// get the current time
UINT64 curtime = current_time();
// we need the absolute callback time, in ticks
UINT64 absolute_callback_ticks = curtime + callback_ticks;
// convert that to an attotime
attotime absolute_callback_time = attotime::from_ticks(absolute_callback_ticks, clock());
// and finally get the delta as an attotime
callback_time = absolute_callback_time - machine().time();
}
m_timer->adjust(callback_time);
@ -342,6 +353,7 @@ void msm6242_device::rtc_clock_updated(int year, int month, int day, int day_of_
void msm6242_device::rtc_timer_callback()
{
update_rtc_registers();
update_timer();
}
@ -359,6 +371,24 @@ UINT8 msm6242_device::get_clock_nibble(int rtc_register, bool high)
//-------------------------------------------------
// get_clock_nibble
//-------------------------------------------------
const char *msm6242_device::irq_type_string(UINT8 irq_type)
{
switch(irq_type)
{
case IRQ_64THSECOND: return "1/64th second";
case IRQ_SECOND: return "second";
case IRQ_MINUTE: return "minute";
case IRQ_HOUR: return "hour";
default: return "???";
}
}
//**************************************************************************
// READ/WRITE HANDLERS
//**************************************************************************
@ -487,12 +517,18 @@ WRITE8_MEMBER( msm6242_device::write )
{
m_irq_flag = 1;
m_irq_type = (data & 0xc) >> 2;
if (LOG_IRQ_ENABLE)
logerror("%s: MSM6242 enabling irq '%s'\n", machine().describe_context(), irq_type_string(m_irq_type));
}
else
{
m_irq_flag = 0;
if ( !m_res_out_int_func.isnull() )
m_res_out_int_func( CLEAR_LINE );
if (LOG_IRQ_ENABLE)
logerror("%s: MSM6242 disabling irq\n", machine().describe_context());
}
break;

1
src/emu/machine/msm6242.h
View File

@ -81,6 +81,7 @@ private:
void update_rtc_registers();
void update_timer();
UINT8 get_clock_nibble(int rtc_register, bool high);
static const char *irq_type_string(UINT8 irq_type);
};