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Creates a shell for the disk-drive add-on card.

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This commit is contained in:
Thomas Harte 2021-06-20 20:50:23 -04:00
parent d7ff6bd04d
commit 954386f1cc
3 changed files with 91 additions and 0 deletions
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30
Machines/Enterprise/EXDos.cpp Normal file
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@ -0,0 +1,30 @@
//
// EXDos.cpp
// Clock Signal
//
// Created by Thomas Harte on 20/06/2021.
// Copyright © 2021 Thomas Harte. All rights reserved.
//
#include "EXDos.hpp"
using namespace Enterprise;
EXDos::EXDos() : WD1770(P1770) {
// emplace_drives(2, 8000000, 300, 2);
set_control_register(0x00);
}
void EXDos::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive) {
}
void EXDos::set_control_register(uint8_t control) {
last_control_ = control;
}
uint8_t EXDos::get_control_register() {
return last_control_;
}
void EXDos::set_motor_on(bool on) {
}

34
Machines/Enterprise/EXDos.hpp Normal file
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@ -0,0 +1,34 @@
//
// EXDos.hpp
// Clock Signal
//
// Created by Thomas Harte on 20/06/2021.
// Copyright © 2021 Thomas Harte. All rights reserved.
//
#ifndef EXDos_hpp
#define EXDos_hpp
#include "../../Components/1770/1770.hpp"
#include "../../Activity/Observer.hpp"
namespace Enterprise {
class EXDos final : public WD::WD1770 {
public:
EXDos();
void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive);
void set_control_register(uint8_t control);
uint8_t get_control_register();
private:
uint8_t last_control_ = 0;
void set_motor_on(bool on) override;
};
}
#endif /* EXDos_hpp */

27
Machines/Enterprise/Enterprise.cpp
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@ -10,6 +10,7 @@
#include "Keyboard.hpp"
#include "Nick.hpp"
#include "EXDos.hpp"
#include "../MachineTypes.hpp"
@ -208,6 +209,11 @@ template <bool has_disk_controller> class ConcreteMachine:
previous_nick_interrupt_line_ = nick_interrupt_line;
}
// The WD/etc runs at a nominal 8Mhz.
if constexpr (has_disk_controller) {
exdos_.run_for(Cycles(cycle.length.as_integral()));
}
switch(cycle.operation) {
default: break;
@ -218,6 +224,15 @@ template <bool has_disk_controller> class ConcreteMachine:
assert(false);
break;
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
*cycle.value = exdos_.read(address);
break;
case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f:
*cycle.value = exdos_.get_control_register();
break;
case 0xb0: *cycle.value = pages_[0]; break;
case 0xb1: *cycle.value = pages_[1]; break;
case 0xb2: *cycle.value = pages_[2]; break;
@ -243,6 +258,15 @@ template <bool has_disk_controller> class ConcreteMachine:
assert(false);
break;
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
exdos_.write(address, *cycle.value);
break;
case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f:
exdos_.set_control_register(*cycle.value);
break;
case 0x80: case 0x81: case 0x82: case 0x83:
case 0x84: case 0x85: case 0x86: case 0x87:
case 0x88: case 0x89: case 0x8a: case 0x8b:
@ -405,6 +429,9 @@ template <bool has_disk_controller> class ConcreteMachine:
JustInTimeActor<Nick, HalfCycles, 40434603, 11360000> nick_;
bool previous_nick_interrupt_line_ = false;
// Cf. timing guesses above.
// MARK: - EXDos card.
EXDos exdos_;
};
}