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Eliminate interrupt magic constants.

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This commit is contained in:
Thomas Harte 2021-10-29 19:04:06 -07:00
parent d25804f4a2
commit 5ffe71346c
1 changed files with 11 additions and 3 deletions
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14
Components/6526/Implementation/6526Implementation.hpp
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@ -15,6 +15,14 @@
namespace MOS {
namespace MOS6526 {
enum Interrupts: uint8_t {
TimerA = 1 << 0,
TimerB = 1 << 1,
Alarm = 1 << 2,
SerialPort = 1 << 3,
Flag = 1 << 4,
};
template <typename BusHandlerT, Personality personality>
template <int port> void MOS6526<BusHandlerT, personality>::set_port_output() {
const uint8_t output = output_[port] | (~data_direction_[port]);
@ -57,7 +65,7 @@ void MOS6526<BusHandlerT, personality>::set_cnt_input(bool active) {
template <typename BusHandlerT, Personality personality>
void MOS6526<BusHandlerT, personality>::set_flag_input(bool low) {
if(low && !flag_state_) {
posit_interrupt(0x10);
posit_interrupt(Interrupts::Flag);
}
flag_state_ = low;
}
@ -184,7 +192,7 @@ void MOS6526<BusHandlerT, personality>::run_for(const HalfCycles half_cycles) {
const bool timer1_carry = timer1_did_reload && (counter_[1].control & 0x60) == 0x40;
const bool timer2_did_reload = counter_[1].template advance<true>(timer1_carry, cnt_state_, cnt_edge_);
posit_interrupt((timer1_did_reload ? 0x01 : 0x00) | (timer2_did_reload ? 0x02 : 0x00));
posit_interrupt((timer1_did_reload ? Interrupts::TimerA : 0x00) | (timer2_did_reload ? Interrupts::TimerB : 0x00));
cnt_edge_ = false;
}
@ -194,7 +202,7 @@ template <typename BusHandlerT, Personality personality>
void MOS6526<BusHandlerT, personality>::advance_tod(int count) {
if(!count) return;
if(tod_.advance(count)) {
posit_interrupt(0x04);
posit_interrupt(Interrupts::Alarm);
}
}