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viacuda: fix interrupts.

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This commit is contained in:
Maxim Poliakovski 2022-08-24 13:08:24 +02:00
parent b38d00ce2d
commit 994f8d7155
2 changed files with 9 additions and 7 deletions
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14
devices/common/viacuda.cpp
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@ -62,7 +62,6 @@ ViaCuda::ViaCuda() {
this->_via_ifr = 0; // all flags cleared
this->_via_ier = 0; // all interrupts disabled
this->irq = 0; // IRQ is not active
// intialize counters/timers
this->t1_counter = 0xFFFF;
@ -249,11 +248,14 @@ void ViaCuda::print_enabled_ints() {
}
}
inline void ViaCuda::update_irq() {
uint8_t new_irq = !!(this->_via_ifr & this->_via_ier & 0x7F);
this->_via_ifr = (this->_via_ifr & 0x7F) | (new_irq << 7);
if (new_irq != this->irq) {
this->irq = new_irq;
void ViaCuda::update_irq()
{
uint8_t active_ints = this->_via_ifr & this->_via_ier & 0x7F;
if (active_ints != this->old_ifr) {
uint8_t new_irq = !!active_ints;
this->_via_ifr = (active_ints) | (new_irq << 7);
this->old_ifr = active_ints;
LOG_F(6, "VIA: assert IRQ, IFR=0x%02X", this->_via_ifr);
this->int_ctrl->ack_int(this->irq_id, new_irq);
}
}

2
devices/common/viacuda.h
View File

@ -195,7 +195,7 @@ private:
uint32_t irq_id;
uint8_t _via_ifr;
uint8_t _via_ier;
uint8_t irq;
uint8_t old_ifr = 0;
/* Cuda state. */
uint8_t old_tip;