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Adjusted slightly as per Z80 change, and to pull everything internally declared into the Amstrad CPC namespace.

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Thomas Harte 2017-08-02 22:11:03 -04:00
parent 039811ce6a
commit 42e70ef993
1 changed files with 13 additions and 6 deletions
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19
Machines/AmstradCPC/AmstradCPC.cpp
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@ -16,7 +16,7 @@
#include "../../Storage/Tape/Tape.hpp" #include "../../Storage/Tape/Tape.hpp"
using namespace AmstradCPC; namespace AmstradCPC {
/*! /*!
Models the CPC's interrupt timer. Inputs are vsync, hsync, interrupt acknowledge and reset, and its output Models the CPC's interrupt timer. Inputs are vsync, hsync, interrupt acknowledge and reset, and its output
@ -478,10 +478,11 @@ class i8255PortHandler : public Intel::i8255::PortHandler {
The actual Amstrad CPC implementation; tying the 8255, 6845 and AY to the Z80. The actual Amstrad CPC implementation; tying the 8255, 6845 and AY to the Z80.
*/ */
class ConcreteMachine: class ConcreteMachine:
public CPU::Z80::Processor<ConcreteMachine>, public CPU::Z80::BusHandler,
public Machine { public Machine {
public: public:
ConcreteMachine() : ConcreteMachine() :
z80_(*this),
crtc_counter_(HalfCycles(4)), // This starts the CRTC exactly out of phase with the memory accesses crtc_counter_(HalfCycles(4)), // This starts the CRTC exactly out of phase with the memory accesses
crtc_(crtc_bus_handler_), crtc_(crtc_bus_handler_),
crtc_bus_handler_(ram_, interrupt_timer_), crtc_bus_handler_(ram_, interrupt_timer_),
@ -496,7 +497,7 @@ class ConcreteMachine:
inline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) { inline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
// Amstrad CPC timing scheme: assert WAIT for three out of four cycles // Amstrad CPC timing scheme: assert WAIT for three out of four cycles
clock_offset_ = (clock_offset_ + cycle.length) & HalfCycles(7); clock_offset_ = (clock_offset_ + cycle.length) & HalfCycles(7);
set_wait_line(clock_offset_ >= HalfCycles(2)); z80_.set_wait_line(clock_offset_ >= HalfCycles(2));
// Update the CRTC once every eight half cycles; aiming for half-cycle 4 as // Update the CRTC once every eight half cycles; aiming for half-cycle 4 as
// per the initial seed to the crtc_counter_, but any time in the final four // per the initial seed to the crtc_counter_, but any time in the final four
@ -505,7 +506,7 @@ class ConcreteMachine:
crtc_counter_ += cycle.length; crtc_counter_ += cycle.length;
int crtc_cycles = crtc_counter_.divide(HalfCycles(8)).as_int(); int crtc_cycles = crtc_counter_.divide(HalfCycles(8)).as_int();
if(crtc_cycles) crtc_.run_for(Cycles(1)); if(crtc_cycles) crtc_.run_for(Cycles(1));
set_interrupt_line(interrupt_timer_.get_request()); z80_.set_interrupt_line(interrupt_timer_.get_request());
// TODO (in the player, not here): adapt it to accept an input clock rate and // TODO (in the player, not here): adapt it to accept an input clock rate and
// run_for as HalfCycles // run_for as HalfCycles
@ -629,7 +630,7 @@ class ConcreteMachine:
/// Wires virtual-dispatched CRTMachine run_for requests to the static Z80 method. /// Wires virtual-dispatched CRTMachine run_for requests to the static Z80 method.
void run_for(const Cycles cycles) { void run_for(const Cycles cycles) {
CPU::Z80::Processor<ConcreteMachine>::run_for(cycles); z80_.run_for(cycles);
} }
/// The ConfigurationTarget entry point; should configure this meachine as described by @c target. /// The ConfigurationTarget entry point; should configure this meachine as described by @c target.
@ -674,6 +675,8 @@ class ConcreteMachine:
} }
private: private:
CPU::Z80::Processor<ConcreteMachine> z80_;
CRTCBusHandler crtc_bus_handler_; CRTCBusHandler crtc_bus_handler_;
Motorola::CRTC::CRTC6845<CRTCBusHandler> crtc_; Motorola::CRTC::CRTC6845<CRTCBusHandler> crtc_;
@ -697,7 +700,11 @@ class ConcreteMachine:
KeyboardState key_state_; KeyboardState key_state_;
}; };
}
using namespace AmstradCPC;
// See header; constructs and returns an instance of the Amstrad CPC. // See header; constructs and returns an instance of the Amstrad CPC.
Machine *Machine::AmstradCPC() { Machine *Machine::AmstradCPC() {
return new ConcreteMachine; return new AmstradCPC::ConcreteMachine;
} }