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Ensures serial lines know their writer's clock rate.

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This commit is contained in:
Thomas Harte 2019-10-13 20:41:08 -04:00
parent d7982aa84e
commit f86dc082bb
5 changed files with 14 additions and 4 deletions
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5
Components/6850/6850.cpp
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@ -13,7 +13,10 @@
using namespace Motorola::ACIA;
ACIA::ACIA() {}
ACIA::ACIA(int clock_rate) {
transmit.set_writer_clock_rate(clock_rate);
request_to_send.set_writer_clock_rate(clock_rate);
}
uint8_t ACIA::read(int address) {
if(address&1) {

2
Components/6850/6850.hpp
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@ -19,7 +19,7 @@ namespace ACIA {
class ACIA: public ClockingHint::Source {
public:
ACIA();
ACIA(int clock_rate);
/*!
Reads from the ACIA.

4
Components/SerialPort/SerialPort.cpp
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@ -10,6 +10,10 @@
using namespace Serial;
void Line::set_writer_clock_rate(int clock_rate) {
clock_rate_ = clock_rate;
}
void Line::advance_writer(int cycles) {
remaining_delays_ = std::max(remaining_delays_ - cycles, 0);
while(!events_.empty()) {

3
Components/SerialPort/SerialPort.hpp
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@ -24,6 +24,8 @@ namespace Serial {
*/
class Line {
public:
void set_writer_clock_rate(int clock_rate);
/// Advances the read position by @c cycles relative to the writer's
/// clock rate.
void advance_writer(int cycles);
@ -61,6 +63,7 @@ class Line {
std::vector<Event> events_;
int remaining_delays_ = 0;
bool level_ = false;
int clock_rate_ = 0;
};
/*!

4
Machines/AtariST/AtariST.cpp
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@ -39,8 +39,8 @@ class ConcreteMachine:
public:
ConcreteMachine(const Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
mc68000_(*this),
keyboard_acia_(),
midi_acia_(),
keyboard_acia_(CLOCK_RATE / 10),
midi_acia_(CLOCK_RATE / 10),
ay_(audio_queue_),
speaker_(ay_) {
set_clock_rate(CLOCK_RATE);