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This commit is contained in:
Angelo Salese 2012-12-07 16:07:33 +00:00
parent 49d9ed05aa
commit 03584acd3d
1 changed files with 5 additions and 13 deletions
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18
src/emu/machine/upd1990a.c
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@ -156,17 +156,18 @@ void upd1990a_device::device_timer(emu_timer &timer, device_timer_id id, int par
case TIMER_TEST_MODE: case TIMER_TEST_MODE:
if (m_oe) if (m_oe)
{ {
/* TODO: completely untested */
/* time counter is advanced at 1024 Hz from "Second" counter input */ /* time counter is advanced at 1024 Hz from "Second" counter input */
int i; int i;
for(i=0;i<4;i++) m_data_out = (m_time_counter[4] == 0);
for(i=0;i<5;i++)
{ {
m_time_counter[i]++; m_time_counter[i]++;
if(m_time_counter[i] != 0) if(m_time_counter[i] != 0)
break; return;
} }
m_data_out = (m_time_counter[4] == 0);
} }
else // parallel else // parallel
{ {
@ -177,15 +178,6 @@ void upd1990a_device::device_timer(emu_timer &timer, device_timer_id id, int par
m_time_counter[3]++; m_time_counter[3]++;
m_time_counter[4]++; m_time_counter[4]++;
m_data_out = (m_time_counter[4] == 0); m_data_out = (m_time_counter[4] == 0);
if(0)
{
int i;
for(i=0;i<5;i++)
printf("%02x ",m_time_counter[i]);
printf("\n");
}
} }
break; break;