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GBHawk: Timer work

This commit is contained in:
alyosha-tas 2018-05-15 15:50:33 -04:00
parent 1b991de966
commit 148f6d4332
1 changed files with 12 additions and 7 deletions
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19
BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Timer.cs
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@ -93,10 +93,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
write_ignore = 4;
TMA_coincidence = true;
}
else if (pending_reload == 1 && !reload_block)
{
// set interrupts
if (Core.REG_FFFF.Bit(2)) { Core.cpu.FlagI = true; }
Core.REG_FF0F |= 0x04;
@ -135,11 +131,20 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
timer_old = timer;
timer++;
// if overflow, set the interrupt flag and reload the timer (4 clocks later)
// if overflow happens, set the interrupt flag and reload the timer (if applicable)
if (timer < timer_old)
{
pending_reload = 4;
reload_block = false;
if (timer_control.Bit(2))
{
pending_reload = 4;
reload_block = false;
}
else
{
//TODO: Check if timer still gets reloaded if TAC diabled causes overflow
if (Core.REG_FFFF.Bit(2)) { Core.cpu.FlagI = true; }
Core.REG_FF0F |= 0x04;
}
}
}