diff --git a/Components/68901/MFP68901.cpp b/Components/68901/MFP68901.cpp
new file mode 100644
index 000000000..be1b48a86
--- /dev/null
+++ b/Components/68901/MFP68901.cpp
@@ -0,0 +1,28 @@
+//
+// MFP68901.cpp
+// Clock Signal
+//
+// Created by Thomas Harte on 06/10/2019.
+// Copyright © 2019 Thomas Harte. All rights reserved.
+//
+
+#include "MFP68901.hpp"
+
+using namespace Motorola::MFP68901;
+
+uint8_t MFP68901::read(int address) {
+ /* TODO */
+ return 0xff;
+}
+
+void MFP68901::write(int address, uint8_t value) {
+ /* TODO */
+}
+
+void MFP68901::run_for(HalfCycles) {
+ /* TODO */
+}
+
+HalfCycles MFP68901::get_next_sequence_point() {
+ return HalfCycles(-1);
+}
diff --git a/Components/68901/MFP68901.hpp b/Components/68901/MFP68901.hpp
new file mode 100644
index 000000000..fbecb5c0b
--- /dev/null
+++ b/Components/68901/MFP68901.hpp
@@ -0,0 +1,30 @@
+//
+// MFP68901.hpp
+// Clock Signal
+//
+// Created by Thomas Harte on 06/10/2019.
+// Copyright © 2019 Thomas Harte. All rights reserved.
+//
+
+#ifndef MFP68901_hpp
+#define MFP68901_hpp
+
+#include <cstdint>
+#include "../../ClockReceiver/ClockReceiver.hpp"
+
+namespace Motorola {
+namespace MFP68901 {
+
+class MFP68901 {
+ public:
+ uint8_t read(int address);
+ void write(int address, uint8_t value);
+
+ void run_for(HalfCycles);
+ HalfCycles get_next_sequence_point();
+};
+
+}
+}
+
+#endif /* MFP68901_hpp */
diff --git a/Machines/AtariST/AtariST.cpp b/Machines/AtariST/AtariST.cpp
index 1cda5e5a6..b7bef6755 100644
--- a/Machines/AtariST/AtariST.cpp
+++ b/Machines/AtariST/AtariST.cpp
@@ -13,6 +13,7 @@
#include "../../Processors/68000/68000.hpp"
#include "../../Components/AY38910/AY38910.hpp"
+#include "../../Components/68901/MFP68901.hpp"
#include "Video.hpp"
#include "../../ClockReceiver/JustInTime.hpp"
@@ -173,7 +174,55 @@ class ConcreteMachine:
ay_.set_control_lines(GI::AY38910::ControlLines(0));
}
}
+
+ /*
+ TODO: Port A:
+ b7: reserved
+ b6: "freely usable output (monitor jack)"
+ b5: centronics strobe
+ b4: RS-232 DTR output
+ b3: RS-232 RTS output
+ b2: select floppy drive 1
+ b1: select floppy drive 0
+ b0: "page choice signal for double-sided floppy drive"
+ */
return HalfCycles(2);
+
+ // The MFP block:
+ case 0x7ffd00: case 0x7ffd01: case 0x7ffd02: case 0x7ffd03:
+ case 0x7ffd04: case 0x7ffd05: case 0x7ffd06: case 0x7ffd07:
+ case 0x7ffd08: case 0x7ffd09: case 0x7ffd0a: case 0x7ffd0b:
+ case 0x7ffd0c: case 0x7ffd0d: case 0x7ffd0e: case 0x7ffd0f:
+ case 0x7ffd10: case 0x7ffd11: case 0x7ffd12: case 0x7ffd13:
+ case 0x7ffd14: case 0x7ffd15: case 0x7ffd16: case 0x7ffd17:
+ case 0x7ffd18: case 0x7ffd19: case 0x7ffd1a: case 0x7ffd1b:
+ case 0x7ffd1c: case 0x7ffd1d: case 0x7ffd1e: case 0x7ffd1f:
+ if(!cycle.data_select_active()) return HalfCycles(0);
+
+ // The lower data lines aren't connected.
+ if(!cycle.upper_data_select()) {
+ if(cycle.operation & Microcycle::Read) {
+ cycle.value->halves.low = 0xff;
+ }
+ return HalfCycles(0);
+ }
+
+ if(cycle.operation & Microcycle::Read) {
+ const uint8_t value = mfp_->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) {
+ mfp_->write(int(address), cycle.value->halves.low);
+ } else {
+ mfp_->write(int(address), cycle.value->halves.high);
+ }
+ }
+ break;
}
return HalfCycles(0);
}
@@ -211,6 +260,7 @@ class ConcreteMachine:
forceinline void advance_time(HalfCycles length) {
video_ += length;
cycles_since_audio_update_ += length;
+ mfp_ += length;
}
void update_audio() {
@@ -219,6 +269,7 @@ class ConcreteMachine:
CPU::MC68000::Processor<ConcreteMachine, true> mc68000_;
JustInTimeActor<Video, HalfCycles> video_;
+ JustInTimeActor<Motorola::MFP68901::MFP68901, HalfCycles> mfp_;
Concurrency::DeferringAsyncTaskQueue audio_queue_;
GI::AY38910::AY38910 ay_;
diff --git a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
index 26fcce5e6..e8ab56003 100644
--- a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
+++ b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
@@ -317,6 +317,8 @@
4B90467622C6FD6E000E2074 /* 68000ArithmeticTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4B90467522C6FD6E000E2074 /* 68000ArithmeticTests.mm */; };
4B924E991E74D22700B76AF1 /* AtariStaticAnalyserTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4B924E981E74D22700B76AF1 /* AtariStaticAnalyserTests.mm */; };
4B9252CE1E74D28200B76AF1 /* Atari ROMs in Resources */ = {isa = PBXBuildFile; fileRef = 4B9252CD1E74D28200B76AF1 /* Atari ROMs */; };
+ 4B92E26A234AE35100CD6D1B /* MFP68901.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B92E268234AE35000CD6D1B /* MFP68901.cpp */; };
+ 4B92E26B234AE35100CD6D1B /* MFP68901.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B92E268234AE35000CD6D1B /* MFP68901.cpp */; };
4B92EACA1B7C112B00246143 /* 6502TimingTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B92EAC91B7C112B00246143 /* 6502TimingTests.swift */; };
4B9378E422A199C600973513 /* Audio.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B9378E222A199C600973513 /* Audio.cpp */; };
4B98A05E1FFAD3F600ADF63B /* CSROMFetcher.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4B98A05D1FFAD3F600ADF63B /* CSROMFetcher.mm */; };
@@ -1108,6 +1110,8 @@
4B92294A22B064FD00A1458F /* QuadratureMouse.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = QuadratureMouse.hpp; sourceTree = "<group>"; };
4B924E981E74D22700B76AF1 /* AtariStaticAnalyserTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = AtariStaticAnalyserTests.mm; sourceTree = "<group>"; };
4B9252CD1E74D28200B76AF1 /* Atari ROMs */ = {isa = PBXFileReference; lastKnownFileType = folder; path = "Atari ROMs"; sourceTree = "<group>"; };
+ 4B92E268234AE35000CD6D1B /* MFP68901.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MFP68901.cpp; sourceTree = "<group>"; };
+ 4B92E269234AE35000CD6D1B /* MFP68901.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = MFP68901.hpp; sourceTree = "<group>"; };
4B92EAC91B7C112B00246143 /* 6502TimingTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = 6502TimingTests.swift; sourceTree = "<group>"; };
4B9378E222A199C600973513 /* Audio.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = Audio.cpp; sourceTree = "<group>"; };
4B9378E322A199C600973513 /* Audio.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Audio.hpp; sourceTree = "<group>"; };
@@ -2629,6 +2633,15 @@
path = QuadratureMouse;
sourceTree = "<group>";
};
+ 4B92E267234AE35000CD6D1B /* 68901 */ = {
+ isa = PBXGroup;
+ children = (
+ 4B92E268234AE35000CD6D1B /* MFP68901.cpp */,
+ 4B92E269234AE35000CD6D1B /* MFP68901.hpp */,
+ );
+ path = 68901;
+ sourceTree = "<group>";
+ };
4B9F11C72272375400701480 /* QL Startup */ = {
isa = PBXGroup;
children = (
@@ -3224,8 +3237,8 @@
4BC9DF4A1D04691600F44158 /* Components */ = {
isa = PBXGroup;
children = (
- 4BDACBE922FFA5B50045EF7E /* 5380 */,
4BD468F81D8DF4290084958B /* 1770 */,
+ 4BDACBE922FFA5B50045EF7E /* 5380 */,
4BC9DF4B1D04691600F44158 /* 6522 */,
4B1E85791D174DEC001EF87D /* 6532 */,
4BC9DF4C1D04691600F44158 /* 6560 */,
@@ -3234,6 +3247,7 @@
4BBC951F1F368D87008F4C34 /* 8272 */,
4BB244D222AABAF500BE20E5 /* 8530 */,
4B0E04F71FC9F2C800F43484 /* 9918 */,
+ 4B92E267234AE35000CD6D1B /* 68901 */,
4B595FAA2086DFBA0083CAA8 /* AudioToggle */,
4B4A762D1DB1A35C007AAE2E /* AY38910 */,
4B302181208A550100773308 /* DiskII */,
@@ -4035,6 +4049,7 @@
4B89452F201967B4007DE474 /* StaticAnalyser.cpp in Sources */,
4B894531201967B4007DE474 /* StaticAnalyser.cpp in Sources */,
4B894539201967B4007DE474 /* Tape.cpp in Sources */,
+ 4B92E26B234AE35100CD6D1B /* MFP68901.cpp in Sources */,
4B7F1898215486A200388727 /* StaticAnalyser.cpp in Sources */,
4B15A9FD208249BB005E6C8D /* StaticAnalyser.cpp in Sources */,
4B055AD31FAE9B0B0060FFFF /* Microdisc.cpp in Sources */,
@@ -4231,6 +4246,7 @@
4BB4BFB022A42F290069048D /* MacintoshIMG.cpp in Sources */,
4B05401E219D1618001BF69C /* ScanTarget.cpp in Sources */,
4B4518861F75E91A00926311 /* MFMDiskController.cpp in Sources */,
+ 4B92E26A234AE35100CD6D1B /* MFP68901.cpp in Sources */,
4B54C0BF1F8D8F450050900F /* Keyboard.cpp in Sources */,
4B3FE75E1F3CF68B00448EE4 /* CPM.cpp in Sources */,
4B2BFDB21DAEF5FF001A68B8 /* Video.cpp in Sources */,