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Adds an empty shell for the ACIA.

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This commit is contained in:
Thomas Harte 2019-10-10 20:54:29 -04:00
parent 127bb043e7
commit 4ead905c3c
4 changed files with 96 additions and 1 deletions
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21
Components/6850/6850.cpp Normal file
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@ -0,0 +1,21 @@
//
// 6850.cpp
// Clock Signal
//
// Created by Thomas Harte on 10/10/2019.
// Copyright © 2019 Thomas Harte. All rights reserved.
//
#include "6850.hpp"
using namespace Motorola::ACIA;
uint8_t ACIA::read(int address) {
return 0xff;
}
void ACIA::write(int address, uint8_t value) {
}
void ACIA::run_for(HalfCycles) {
}

29
Components/6850/6850.hpp Normal file
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@ -0,0 +1,29 @@
//
// 6850.hpp
// Clock Signal
//
// Created by Thomas Harte on 10/10/2019.
// Copyright © 2019 Thomas Harte. All rights reserved.
//
#ifndef Motorola_ACIA_6850_hpp
#define Motorola_ACIA_6850_hpp
#include <cstdint>
#include "../../ClockReceiver/ClockReceiver.hpp"
namespace Motorola {
namespace ACIA {
class ACIA {
public:
uint8_t read(int address);
void write(int address, uint8_t value);
void run_for(HalfCycles);
};
}
}
#endif /* Motorola_ACIA_6850_hpp */

31
Machines/AtariST/AtariST.cpp
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@ -14,6 +14,7 @@
#include "../../Components/AY38910/AY38910.hpp"
#include "../../Components/68901/MFP68901.hpp"
#include "../../Components/6850/6850.hpp"
#include "Video.hpp"
#include "../../ClockReceiver/JustInTime.hpp"
@ -267,6 +268,31 @@ class ConcreteMachine:
}
}
break;
// ACIAs.
case 0x7ffe00: case 0x7ffe01: case 0x7ffe02: case 0x7ffe03: {
// Set VPA.
mc68000_.set_is_peripheral_address(!cycle.data_select_active());
if(!cycle.data_select_active()) return HalfCycles(0);
const auto acia_ = (address < 0x7ffe02) ? &keyboard_acia_ : &midi_acia_;
if(cycle.operation & Microcycle::Read) {
const uint8_t value = (*acia_)->read(int(address));
if(cycle.operation & Microcycle::SelectByte) {
cycle.value->halves.low = value;
} else {
cycle.value->halves.high = value;
cycle.value->halves.low = 0xff;
}
} else {
if(cycle.operation & Microcycle::SelectByte) {
(*acia_)->write(int(address), cycle.value->halves.low);
} else {
(*acia_)->write(int(address), cycle.value->halves.high);
}
}
} break;
}
return HalfCycles(0);
}
@ -325,9 +351,12 @@ class ConcreteMachine:
CPU::MC68000::Processor<ConcreteMachine, true> mc68000_;
JustInTimeActor<Video, HalfCycles> video_;
JustInTimeActor<Motorola::MFP68901::MFP68901, HalfCycles> mfp_;
HalfCycles cycles_until_video_event_;
JustInTimeActor<Motorola::MFP68901::MFP68901, HalfCycles> mfp_;
JustInTimeActor<Motorola::ACIA::ACIA, HalfCycles> keyboard_acia_;
JustInTimeActor<Motorola::ACIA::ACIA, HalfCycles> midi_acia_;
Concurrency::DeferringAsyncTaskQueue audio_queue_;
GI::AY38910::AY38910 ay_;
Outputs::Speaker::LowpassSpeaker<GI::AY38910::AY38910> speaker_;

16
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -616,6 +616,8 @@
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4BB299F91B587D8400A49093 /* tyan in Resources */ = {isa = PBXBuildFile; fileRef = 4BB298ED1B587D8400A49093 /* tyan */; };
4BB2A9AF1E13367E001A5C23 /* CRCTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4BB2A9AE1E13367E001A5C23 /* CRCTests.mm */; };
4BB307BB235001C300457D33 /* 6850.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BB307BA235001C300457D33 /* 6850.cpp */; };
4BB307BC235001C300457D33 /* 6850.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BB307BA235001C300457D33 /* 6850.cpp */; };
4BB4BFAD22A33DE50069048D /* DriveSpeedAccumulator.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BB4BFAC22A33DE50069048D /* DriveSpeedAccumulator.cpp */; };
4BB4BFB022A42F290069048D /* MacintoshIMG.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BB4BFAE22A42F290069048D /* MacintoshIMG.cpp */; };
4BB4BFB922A4372F0069048D /* StaticAnalyser.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BB4BFB822A4372E0069048D /* StaticAnalyser.cpp */; };
@ -1415,6 +1417,8 @@
4BB298EC1B587D8400A49093 /* txsn */ = {isa = PBXFileReference; lastKnownFileType = file; path = txsn; sourceTree = "<group>"; };
4BB298ED1B587D8400A49093 /* tyan */ = {isa = PBXFileReference; lastKnownFileType = file; path = tyan; sourceTree = "<group>"; };
4BB2A9AE1E13367E001A5C23 /* CRCTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = CRCTests.mm; sourceTree = "<group>"; };
4BB307B9235001C300457D33 /* 6850.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = 6850.hpp; sourceTree = "<group>"; };
4BB307BA235001C300457D33 /* 6850.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = 6850.cpp; sourceTree = "<group>"; };
4BB4BFAA22A300710069048D /* DeferredAudio.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = DeferredAudio.hpp; sourceTree = "<group>"; };
4BB4BFAB22A33D710069048D /* DriveSpeedAccumulator.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = DriveSpeedAccumulator.hpp; sourceTree = "<group>"; };
4BB4BFAC22A33DE50069048D /* DriveSpeedAccumulator.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = DriveSpeedAccumulator.cpp; sourceTree = "<group>"; };
@ -2956,6 +2960,15 @@
path = "Wolfgang Lorenz 6502 test suite";
sourceTree = "<group>";
};
4BB307B8235001C300457D33 /* 6850 */ = {
isa = PBXGroup;
children = (
4BB307B9235001C300457D33 /* 6850.hpp */,
4BB307BA235001C300457D33 /* 6850.cpp */,
);
path = 6850;
sourceTree = "<group>";
};
4BB4BFB622A4372E0069048D /* Macintosh */ = {
isa = PBXGroup;
children = (
@ -3243,6 +3256,7 @@
4B1E85791D174DEC001EF87D /* 6532 */,
4BC9DF4C1D04691600F44158 /* 6560 */,
4BE845221F2FF7F400A5EA22 /* 6845 */,
4BB307B8235001C300457D33 /* 6850 */,
4BD9137C1F3115AC009BCF85 /* 8255 */,
4BBC951F1F368D87008F4C34 /* 8272 */,
4BB244D222AABAF500BE20E5 /* 8530 */,
@ -4088,6 +4102,7 @@
4B055A8E1FAE85920060FFFF /* BestEffortUpdater.cpp in Sources */,
4B055AB01FAE86070060FFFF /* PulseQueuedTape.cpp in Sources */,
4B055AAC1FAE85FD0060FFFF /* PCMSegment.cpp in Sources */,
4BB307BC235001C300457D33 /* 6850.cpp in Sources */,
4B055AB31FAE860F0060FFFF /* CSW.cpp in Sources */,
4B89451D201967B4007DE474 /* Disk.cpp in Sources */,
4BDACBED22FFA5D20045EF7E /* ncr5380.cpp in Sources */,
@ -4376,6 +4391,7 @@
4B54C0C81F8D91E50050900F /* Keyboard.cpp in Sources */,
4B79A5011FC913C900EEDAD5 /* MSX.cpp in Sources */,
4BEE0A701D72496600532C7B /* PRG.cpp in Sources */,
4BB307BB235001C300457D33 /* 6850.cpp in Sources */,
4BF437EE209D0F7E008CBD6B /* SegmentParser.cpp in Sources */,
4BC131762346DE9100E4FF3D /* StaticAnalyser.cpp in Sources */,
4B8334861F5DA3780097E338 /* 6502Storage.cpp in Sources */,