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Expands size of storage in Cycles/HalfCycles; adjusts widely to compensate.

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Thomas Harte
2019-10-29 22:36:29 -04:00
parent fd02b6fc18
commit 1c154131f9
55 changed files with 191 additions and 183 deletions
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Components/6850/6850.cpp
+8 -11
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@@ -15,8 +15,8 @@ const HalfCycles ACIA::SameAsTransmit;
ACIA::ACIA(HalfCycles transmit_clock_rate, HalfCycles receive_clock_rate) :
transmit_clock_rate_(transmit_clock_rate),
receive_clock_rate_((receive_clock_rate != SameAsTransmit) ? receive_clock_rate : transmit_clock_rate) {
transmit.set_writer_clock_rate(transmit_clock_rate.as_int());
request_to_send.set_writer_clock_rate(transmit_clock_rate.as_int());
transmit.set_writer_clock_rate(transmit_clock_rate);
request_to_send.set_writer_clock_rate(transmit_clock_rate);
}
uint8_t ACIA::read(int address) {
@@ -84,7 +84,7 @@ void ACIA::write(int address, uint8_t value) {
transmit.write(false);
break;
}
receive.set_read_delegate(this, Storage::Time(divider_ * 2, receive_clock_rate_.as_int()));
receive.set_read_delegate(this, Storage::Time(divider_ * 2, int(receive_clock_rate_.as_integral())));
receive_interrupt_enabled_ = value & 0x80;
}
}
@@ -92,27 +92,24 @@ void ACIA::write(int address, uint8_t value) {
}
void ACIA::run_for(HalfCycles length) {
// Transmission.
const int transmit_advance = length.as_int();
if(transmit.transmission_data_time_remaining()) {
if(transmit.transmission_data_time_remaining() > HalfCycles(0)) {
const auto write_data_time_remaining = transmit.write_data_time_remaining();
// There's at most one further byte available to enqueue, so a single 'if'
// rather than a 'while' is correct here. It's the responsibilit of the caller
// to ensure run_for lengths are appropriate for longer sequences.
if(transmit_advance >= write_data_time_remaining) {
if(length >= write_data_time_remaining) {
if(next_transmission_ != NoValueMask) {
transmit.advance_writer(write_data_time_remaining);
consider_transmission();
transmit.advance_writer(transmit_advance - write_data_time_remaining);
transmit.advance_writer(length - write_data_time_remaining);
} else {
transmit.advance_writer(transmit_advance);
transmit.advance_writer(length);
update_clocking_observer();
if(transmit_interrupt_enabled_) add_interrupt_cause(TransmitNeedsWrite);
}
} else {
transmit.advance_writer(transmit_advance);
transmit.advance_writer(length);
}
}
}