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Tie off initial values; fix FIQ usage.

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This commit is contained in:
Thomas Harte 2024-04-07 21:58:16 -04:00
parent d2b077c573
commit ffd298218c
1 changed files with 18 additions and 28 deletions
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46
Machines/Acorn/Archimedes/InputOutputController.hpp
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@ -319,15 +319,15 @@ struct InputOutputController {
// Interrupts.
case 0x18:
irq_a_.mask = byte(bus_value);
// logger.error().append("IRQ A mask set to %02x", byte(bus_value));
logger.error().append("IRQ A mask set to %02x", byte(bus_value));
break;
case 0x28:
irq_b_.mask = byte(bus_value);
// logger.error().append("IRQ B mask set to %02x", byte(bus_value));
logger.error().append("IRQ B mask set to %02x", byte(bus_value));
break;
case 0x38:
fiq_.mask = byte(bus_value);
// logger.error().append("FIQ mask set to %02x", byte(bus_value));
logger.error().append("FIQ mask set to %02x", byte(bus_value));
break;
// Counters.
@ -430,10 +430,6 @@ struct InputOutputController {
// logger.error().append("TODO: exteded external podule space");
// return true;
//
// case 0x331'0000 & AddressMask:
// logger.error().append("TODO: 1772 / disk write");
// return true;
//
// case 0x336'0000 & AddressMask:
// logger.error().append("TODO: podule interrupt request");
// return true;
@ -475,28 +471,22 @@ struct InputOutputController {
const auto &keyboard() const { return keyboard_; }
void update_interrupts() {
if(sound_.interrupt()) {
irq_b_.set(IRQB::SoundBufferPointerUsed);
} else {
irq_b_.clear(IRQB::SoundBufferPointerUsed);
}
const auto set = [&](Interrupt &target, uint8_t flag, bool set) {
if(set) {
target.set(flag);
} else {
target.clear(flag);
}
};
set(irq_b_, IRQB::SoundBufferPointerUsed, sound_.interrupt());
set(fiq_, FIQ::FloppyDiscInterrupt, floppy_.get_interrupt_request_line());
set(fiq_, FIQ::FloppyDiscData, floppy_.get_data_request_line());
if(video_.interrupt()) {
irq_a_.set(IRQA::VerticalFlyback);
}
// if(floppy_.get_interrupt_request_line()) {
// irq_b_.set(FIQ::FloppyDiscInterrupt);
// } else {
// irq_b_.clear(FIQ::FloppyDiscInterrupt);
// }
//
// if(floppy_.get_data_request_line()) {
// irq_b_.set(FIQ::FloppyDiscData);
// } else {
// irq_b_.clear(FIQ::FloppyDiscData);
// }
observer_.update_interrupts();
}
@ -515,7 +505,7 @@ private:
// IRQA, IRQB and FIQ states.
struct Interrupt {
uint8_t status, mask;
uint8_t status = 0x00, mask = 0x00;
uint8_t request() const {
return status & mask;
}
@ -531,9 +521,9 @@ private:
// The IOCs four counters.
struct Counter {
uint16_t value;
uint16_t reload;
uint16_t output;
uint16_t value = 0;
uint16_t reload = 0;
uint16_t output = 0;
};
Counter counters_[4];