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Improves testing; now tests for time to the first interrupt.

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Thomas Harte 2018-10-20 18:25:55 -04:00
parent 30b99f0049
commit 725b364bbc
1 changed files with 37 additions and 0 deletions
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37
OSBindings/Mac/Clock SignalTests/MasterSystemVDPTests.mm
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@ -57,6 +57,10 @@
// Get time until interrupt.
int time_until_interrupt = vdp.get_time_until_interrupt().as_int() - 1;
// Check that an interrupt is now scheduled.
NSAssert(time_until_interrupt != -2, @"No interrupt scheduled");
NSAssert(time_until_interrupt > 0, @"Interrupt is scheduled in the past");
// Check interrupt flag isn't set prior to the reported time.
vdp.run_for(HalfCycles(time_until_interrupt));
NSAssert(!vdp.get_interrupt_line(), @"Interrupt line went active early [1]");
@ -79,4 +83,37 @@
NSAssert(vdp.get_interrupt_line(), @"Interrupt line wasn't set when promised [2]");
}
- (void)testFirstLineInterrupt {
TI::TMS::TMS9918 vdp(TI::TMS::Personality::SMSVDP);
// Disable end-of-frame interrupts, enable line interrupts, set an interrupt to occur every line.
vdp.set_register(1, 0x00);
vdp.set_register(1, 0x81);
vdp.set_register(1, 0x10);
vdp.set_register(1, 0x80);
vdp.set_register(1, 0);
vdp.set_register(1, 0x8a);
// Advance to outside of the counted area.
while(vdp.get_current_line() < 200) vdp.run_for(Cycles(228));
// Clear the pending interrupt and ask about the next one (i.e. the first one).
vdp.get_register(1);
int time_until_interrupt = vdp.get_time_until_interrupt().as_int() - 1;
// Check that an interrupt is now scheduled.
NSAssert(time_until_interrupt != -2, @"No interrupt scheduled");
NSAssert(time_until_interrupt > 0, @"Interrupt is scheduled in the past");
// Check interrupt flag isn't set prior to the reported time.
vdp.run_for(HalfCycles(time_until_interrupt));
NSAssert(!vdp.get_interrupt_line(), @"Interrupt line went active early");
// Check interrupt flag is set at the reported time.
vdp.run_for(HalfCycles(1));
NSAssert(vdp.get_interrupt_line(), @"Interrupt line wasn't set when promised");
}
@end