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Started implementation of the Microdisc selection logic.

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This commit is contained in:
Thomas Harte 2016-11-22 08:12:53 +08:00
parent 59e2a09107
commit 363db695e8
3 changed files with 103 additions and 0 deletions
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62
Machines/Oric/Microdisc.cpp Normal file
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@ -0,0 +1,62 @@
//
// Microdisc.cpp
// Clock Signal
//
// Created by Thomas Harte on 22/11/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#include "Microdisc.hpp"
using namespace Oric;
Microdisc::Microdisc() : irq_enable_(false)
{}
void Microdisc::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive)
{
if(!drives_[drive])
{
drives_[drive].reset(new Storage::Disk::Drive);
if(drive == selected_drive_) set_drive(drives_[drive]);
}
drives_[drive]->set_disk(disk);
}
void Microdisc::set_control_register(uint8_t control)
{
// b7: EPROM select (0 = select)
// b2: data separator clock rate select (1 = double)
// b1: ROM disable (0 = disable)
// b65: drive select
selected_drive_ = (control >> 5)&3;
set_drive(drives_[selected_drive_]);
// b4: side select
for(int c = 0; c < 4; c++)
{
if(drives_[c]) drives_[c]->set_head((control & 0x10) ? 1 : 0);
}
// b3: double density select (0 = double)
set_is_double_density(!(control & 0x08));
// b0: IRQ enable
irq_enable_ = !(control & 0x01);
}
bool Microdisc::get_interrupt_request_line()
{
return irq_enable_ && WD1770::get_interrupt_request_line();
}
uint8_t Microdisc::get_interrupt_request_register()
{
return get_interrupt_request_line() ? 0x00 : 0x80;
}
uint8_t Microdisc::get_data_request_register()
{
return get_data_request_line() ? 0x00 : 0x80;
}

35
Machines/Oric/Microdisc.hpp Normal file
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//
// Microdisc.hpp
// Clock Signal
//
// Created by Thomas Harte on 22/11/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#ifndef Microdisc_hpp
#define Microdisc_hpp
#include "../../Components/1770/1770.hpp"
namespace Oric {
class Microdisc: public WD::WD1770 {
public:
Microdisc();
void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive);
void set_control_register(uint8_t control);
uint8_t get_interrupt_request_register();
uint8_t get_data_request_register();
bool get_interrupt_request_line();
private:
std::shared_ptr<Storage::Disk::Drive> drives_[4];
int selected_drive_;
bool irq_enable_;
};
}
#endif /* Microdisc_hpp */

6
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -55,6 +55,7 @@
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@ -505,6 +506,8 @@
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@ -1791,6 +1794,8 @@
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isa = PBXGroup;
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4B5FADBE1DE3BF2B00AEC565 /* Microdisc.cpp */,
4B5FADBF1DE3BF2B00AEC565 /* Microdisc.hpp */,
4BCF1FA21DADC3DD0039D2E7 /* Oric.cpp */,
4BCF1FA31DADC3DD0039D2E7 /* Oric.hpp */,
4BC8A6291DCE4F2700DAC693 /* Typer.cpp */,
@ -2379,6 +2384,7 @@
4B14145B1B58879D00E04248 /* CPU6502.cpp in Sources */,
4BEE0A6F1D72496600532C7B /* Cartridge.cpp in Sources */,
4B8805FB1DCFF807003085B1 /* Oric.cpp in Sources */,
4B5FADC01DE3BF2B00AEC565 /* Microdisc.cpp in Sources */,
4BEE0A701D72496600532C7B /* PRG.cpp in Sources */,
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4B2A53A01D117D36003C6002 /* CSMachine.mm in Sources */,