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Stores and returns timer configuration.

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This commit is contained in:
Thomas Harte 2019-10-27 22:38:49 -04:00
parent 0cb19421e8
commit de1bfb4e24
2 changed files with 16 additions and 5 deletions
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19
Components/68901/MFP68901.cpp
View File

@ -55,11 +55,17 @@ uint8_t MFP68901::read(int address) {
case 0x0b:
LOG("Read: vector");
return interrupt_vector_;
case 0x0c: LOG("Read: timer A control"); break;
case 0x0d: LOG("Read: timer B control"); break;
case 0x0e: LOG("Read: timers C/D control"); break;
case 0x0c:
LOG("Read: timer A control");
return timer_ab_control_[0];
case 0x0d:
LOG("Read: timer B control");
return timer_ab_control_[1];
case 0x0e:
LOG("Read: timers C/D control");
return timer_cd_control_;
case 0x0f: case 0x10: case 0x11: case 0x12:
return get_timer_data(address - 0xf);
return get_timer_data(address - 0xf);
case 0x13: LOG("Read: sync character generator"); break;
case 0x14: LOG("Read: USART control"); break;
case 0x15: LOG("Read: receiver status"); break;
@ -139,6 +145,7 @@ void MFP68901::write(int address, uint8_t value) {
case 0x0d: {
const auto timer = address - 0xc;
const bool reset = value & 0x10;
timer_ab_control_[timer] = value;
switch(value & 0xf) {
case 0x0: set_timer_mode(timer, TimerMode::Stopped, 1, reset); break;
case 0x1: set_timer_mode(timer, TimerMode::Delay, 4, reset); break;
@ -159,6 +166,7 @@ void MFP68901::write(int address, uint8_t value) {
}
} break;
case 0x0e:
timer_cd_control_ = value;
switch(value & 7) {
case 0: set_timer_mode(3, TimerMode::Stopped, 1, false); break;
case 1: set_timer_mode(3, TimerMode::Delay, 4, false); break;
@ -316,7 +324,8 @@ void MFP68901::update_interrupts() {
// Update the delegate if necessary.
if(interrupt_delegate_ && interrupt_line_ != old_interrupt_line) {
if(interrupt_line_) LOG("Generating interrupt: " << std::hex << interrupt_pending_ << " / " << std::hex << interrupt_mask_ << " : " << std::hex << interrupt_in_service_);
if(interrupt_line_)
LOG("Generating interrupt: " << std::hex << interrupt_pending_ << " / " << std::hex << interrupt_mask_ << " : " << std::hex << interrupt_in_service_);
interrupt_delegate_->mfp68901_did_change_interrupt_status(this);
}
}

2
Components/68901/MFP68901.hpp
View File

@ -60,6 +60,8 @@ class MFP68901 {
int divisor = 1;
bool event_input = false;
} timers_[4];
uint8_t timer_ab_control_[2] = { 0, 0 };
uint8_t timer_cd_control_ = 0;
HalfCycles cycles_left_;