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Made an attempt to wire in an [unclocked] AY, in an endeavour to get to keyboard reading.

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This commit is contained in:
Thomas Harte 2017-08-01 17:01:58 -04:00
parent 2d4e202be3
commit cb732e5d5f
1 changed files with 34 additions and 6 deletions
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40
Machines/AmstradCPC/AmstradCPC.cpp
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@ -253,20 +253,40 @@ class i8255PortHandler : public Intel::i8255::PortHandler {
public:
void set_value(int port, uint8_t value) {
switch(port) {
case 0: printf("PSG data: %d\n", value); break;
case 0:
ay_->set_data_input(value);
break;
case 1: printf("Vsync, etc: %02x\n", value); break;
case 2: printf("Key row, etc: %02x\n", value); break;
case 2:
// TODO: set key row: (value & 15)
// TODO: set casette motor control: ((value >> 4) & 1)
// TODO: set casette output: ((value >> 5) & 1)
ay_->set_control_lines(
(GI::AY38910::ControlLines)(
((value & 0x80) ? GI::AY38910::BCDIR : 0) |
((value & 0x40) ? GI::AY38910::BC1 : 0)
));
break;
}
}
uint8_t get_value(int port) {
switch(port) {
case 0: printf("PSG data\n"); break;
case 0:
return ay_->get_data_output();
break;
case 1: printf("[In] Vsync, etc\n"); break;
case 2: printf("[In] Key row, etc\n"); break;
}
return 0xff;
}
void set_ay(std::shared_ptr<GI::AY38910> ay) {
ay_ = ay;
}
private:
std::shared_ptr<GI::AY38910> ay_;
};
class ConcreteMachine:
@ -276,7 +296,8 @@ class ConcreteMachine:
ConcreteMachine() :
crtc_counter_(HalfCycles(4)), // This starts the CRTC exactly out of phase with the memory accesses
crtc_(crtc_bus_handler_),
crtc_bus_handler_(ram_) {
crtc_bus_handler_(ram_),
i8255_(i8255_port_handler_) {
// primary clock is 4Mhz
set_clock_rate(4000000);
}
@ -368,14 +389,19 @@ class ConcreteMachine:
return HalfCycles(0);
}
void flush() {}
void flush() {
// i8255_port_handler_.flush();
}
void setup_output(float aspect_ratio) {
crtc_bus_handler_.setup_output(aspect_ratio);
ay_.reset(new GI::AY38910);
i8255_port_handler_.set_ay(ay_);
}
void close_output() {
crtc_bus_handler_.close_output();
ay_.reset();
}
std::shared_ptr<Outputs::CRT::CRT> get_crt() {
@ -383,7 +409,7 @@ class ConcreteMachine:
}
std::shared_ptr<Outputs::Speaker> get_speaker() {
return nullptr;
return ay_;
}
void run_for(const Cycles cycles) {
@ -416,11 +442,13 @@ class ConcreteMachine:
CRTCBusHandler crtc_bus_handler_;
Motorola::CRTC::CRTC6845<CRTCBusHandler> crtc_;
std::shared_ptr<GI::AY38910> ay_;
i8255PortHandler i8255_port_handler_;
Intel::i8255::i8255<i8255PortHandler> i8255_;
HalfCycles clock_offset_;
HalfCycles crtc_counter_;
HalfCycles half_cycles_since_ay_update_;
uint8_t ram_[65536];
std::vector<uint8_t> os_, basic_;