mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2025-01-21 21:30:31 +00:00
Wire the MC6850 chip into the MC6809 test code.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon
parent
754fc8e6a3
commit
b3faa0bb2e
@ -23,13 +23,16 @@ void Board::initialise() {
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CPU().ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_die, this, std::placeholders::_1));
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//WrittenByte.connect(std::bind(&Board::Bus_WrittenByte, this, std::placeholders::_1));
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//ReadingByte.connect(std::bind(&Board::Bus_ReadingByte, this, std::placeholders::_1));
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WritingByte.connect(std::bind(&Board::Bus_WritingByte_Acia, this, std::placeholders::_1));
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ReadingByte.connect(std::bind(&Board::Bus_ReadingByte_Acia, this, std::placeholders::_1));
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CPU().ExecutedInstruction.connect(std::bind(&Board::Cpu_ExecutedInstruction_Acia, this, std::placeholders::_1));
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CPU().powerOn();
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CPU().raise(CPU().NMI());
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CPU().raise(CPU().FIRQ());
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CPU().reset();
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ACIA().powerOn();
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}
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void Board::Cpu_ExecutingInstruction_Debug(EightBit::mc6809&) {
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@ -42,25 +45,10 @@ void Board::Cpu_ExecutedInstruction_Debug(EightBit::mc6809&) {
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std::cout << m_disassembler.trace(m_disassembleAt) << std::endl;
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}
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void Board::Cpu_ExecutedInstruction_die(EightBit::mc6809& cpu) {
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void Board::Cpu_ExecutedInstruction_die(EightBit::mc6809&) {
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static uint64_t instructions = 0UL;
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if (++instructions > 90000000)
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cpu.powerOff();
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}
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void Board::Bus_WrittenByte(EightBit::EventArgs&) {
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if ((ADDRESS().word > 0x9fff) && (ADDRESS().word < 0xc000))
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std::cout << std::hex << "** IO wrote " << DATA() << " to " << ADDRESS() << std::endl;
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}
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void Board::Bus_ReadingByte(EightBit::EventArgs&) {
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if ((ADDRESS().word > 0x9fff) && (ADDRESS().word < 0xc000)) {
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std::cout << std::hex << "** IO reading " << ADDRESS() << std::endl;
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switch (ADDRESS().word) {
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case 0xa000:
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poke(ADDRESS(), 0x03);
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}
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}
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CPU().powerOff();
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}
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EightBit::MemoryMapping Board::mapping(uint16_t address) {
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@ -76,3 +64,25 @@ EightBit::MemoryMapping Board::mapping(uint16_t address) {
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return { m_rom, 0xc000, EightBit::MemoryMapping::ReadOnly };
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}
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void Board::Bus_WritingByte_Acia(EightBit::EventArgs&) {
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ACIA().RW() = EightBit::Chip::Low;
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updateAciaPins();
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}
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void Board::Bus_ReadingByte_Acia(EightBit::EventArgs&) {
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ACIA().RW() = EightBit::Chip::High;
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updateAciaPins();
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}
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void Board::updateAciaPins() {
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ACIA().DATA() = DATA();
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ACIA().RS() = ADDRESS().word & EightBit::Chip::Bit0 ? EightBit::Chip::PinLevel::High : EightBit::Chip::PinLevel::Low;
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ACIA().CS0() = ADDRESS().word & EightBit::Chip::Bit15 ? EightBit::Chip::PinLevel::High : EightBit::Chip::PinLevel::Low;
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ACIA().CS1() = ADDRESS().word & EightBit::Chip::Bit13 ? EightBit::Chip::PinLevel::High : EightBit::Chip::PinLevel::Low;
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ACIA().CS2() = ADDRESS().word & EightBit::Chip::Bit14 ? EightBit::Chip::PinLevel::High : EightBit::Chip::PinLevel::Low;
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}
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void Board::Cpu_ExecutedInstruction_Acia(EightBit::mc6809&) {
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ACIA().step(CPU().cycles());
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}
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@ -8,12 +8,14 @@
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#include <Bus.h>
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#include <mc6809.h>
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#include <Disassembly.h>
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#include <MC6850.h>
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class Board : public EightBit::Bus {
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public:
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Board(const Configuration& configuration);
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EightBit::mc6809& CPU() { return m_cpu; }
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EightBit::mc6850& ACIA() { return m_acia; }
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void initialise();
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@ -36,6 +38,8 @@ private:
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EightBit::Ram m_io = 0x2000; // A000 - BFFF, 8K serial interface, minimally decoded
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EightBit::Rom m_rom = 0x4000; // C000 - FFFF, 16K ROM
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EightBit::mc6850 m_acia;
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EightBit::mc6809 m_cpu;
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EightBit::Disassembly m_disassembler;
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@ -47,8 +51,14 @@ private:
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void Cpu_ExecutingInstruction_Debug(EightBit::mc6809& cpu);
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void Cpu_ExecutedInstruction_Debug(EightBit::mc6809& cpu);
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void Cpu_ExecutedInstruction_die(EightBit::mc6809& cpu);
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void Cpu_ExecutedInstruction_die(EightBit::mc6809&);
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void Bus_WrittenByte(EightBit::EventArgs&);
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void Bus_ReadingByte(EightBit::EventArgs&);
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// ACIA handling
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void Bus_WritingByte_Acia(EightBit::EventArgs&);
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void Bus_ReadingByte_Acia(EightBit::EventArgs&);
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void Cpu_ExecutedInstruction_Acia(EightBit::mc6809&);
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void updateAciaPins();
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};
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@ -71,19 +71,19 @@
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<LinkIncremental>false</LinkIncremental>
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<IncludePath>..\inc;..\..\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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<IncludePath>..\inc;..\..\inc;..\..\MC6850\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<LinkIncremental>true</LinkIncremental>
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<IncludePath>..\inc;..\..\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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<IncludePath>..\inc;..\..\inc;..\..\MC6850\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<LinkIncremental>true</LinkIncremental>
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<IncludePath>..\inc;..\..\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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<IncludePath>..\inc;..\..\inc;..\..\MC6850\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<LinkIncremental>false</LinkIncremental>
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<IncludePath>..\inc;..\..\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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<IncludePath>..\inc;..\..\inc;..\..\MC6850\inc;C:\Libraries\boost_1_65_1;$(IncludePath)</IncludePath>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<ClCompile>
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@ -167,6 +167,9 @@
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<ClCompile Include="test.cpp" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\MC6850\src\MC6850.vcxproj">
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<Project>{a4ada650-55c3-4c00-8dad-e4e4aff86eff}</Project>
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</ProjectReference>
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<ProjectReference Include="..\..\src\EightBit.vcxproj">
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<Project>{a9c24bd9-0cb4-4c84-b09b-46b815f9da47}</Project>
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</ProjectReference>
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@ -2,10 +2,10 @@
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#include <cstdint>
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#include <Processor.h>
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#include <Chip.h>
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namespace EightBit {
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class mc6850 {
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class mc6850 : public Chip {
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public:
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// +--------+----------------------------------------------------------------------------------+
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// | | Buffer address |
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@ -14,10 +14,10 @@ namespace EightBit {
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// | Data | RS * R/W | RS * R/W | RS * R/W | RS * R/W |
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// | Bus | (high)(low) | (high)(high) | (low)(low) | (low)(low) |
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// | Line | Transmit | Receive | | |
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// | Number | Data | Data | Control | Control |
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// | | Register | Register | register | register |
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// | Number | Data | Data | Control | Status |
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// | | Register | Register | register | register |
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// | +------------------+------------------+--------------------+-----------------------+
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// | | (Write only) + (Read only) + (Write only) | (Read only) |
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// | | (Write only) + (Read only) + (Write only) | (Read only) |
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// +--------+------------------+------------------+--------------------+-----------------------+
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// | 0 | Data bit 0* | Data bit 0 | Counter divide | Receive data register |
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// | | | | select 1 (CR0) | full (RDRF) |
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@ -47,49 +47,89 @@ namespace EightBit {
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// ** Data bit will be zero in 7-bit plus parity modes
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// *** Data bit is "don't case" in 7-bit plus parity modes
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Processor::PinLevel& RXDATA() { return m_RXDATA; } // Receive data, (I) Active high
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Processor::PinLevel& TXDATA() { return m_TXDATA; } // Transmit data, (O) Active high
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enum ControlRegisters {
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CR0 = 0b1,
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CR1 = 0b10,
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CR2 = 0b100,
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CR3 = 0b1000,
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CR4 = 0b10000,
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CR5 = 0b100000,
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CR6 = 0b1000000,
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CR7 = 0b10000000
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};
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enum StatusRegisters {
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RDRF = 0b1,
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TDRE = 0b10,
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kDCD = 0b100,
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kCTS = 0b1000,
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FE = 0b10000,
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OVRN = 0b100000,
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PE = 0b1000000,
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kIRQ = 0b10000000,
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};
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Processor::PinLevel& RTS() { return m_RTS; } // Request to send, (O) Active low
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Processor::PinLevel& CTS() { return m_CTS; } // Clear to send, (I) Active low
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Processor::PinLevel& DCD() { return m_DCD; } // Data carrier detect, (I) Active low
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PinLevel& RXDATA() { return m_RXDATA; } // Receive data, (I) Active high
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PinLevel& TXDATA() { return m_TXDATA; } // Transmit data, (O) Active high
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Processor::PinLevel& RXCLK() { return m_RXCLK; } // Transmit clock, (I) Active high
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Processor::PinLevel& TXCLK() { return m_TXCLK; } // Receive clock, (I) Active high
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PinLevel& RTS() { return m_RTS; } // Request to send, (O) Active low
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PinLevel& CTS() { return m_CTS; } // Clear to send, (I) Active low
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PinLevel& DCD() { return m_DCD; } // Data carrier detect, (I) Active low
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uint8_t& DATA() { return m_data; } // Data, (I/O)
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PinLevel& RXCLK() { return m_RXCLK; } // Transmit clock, (I) Active high
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PinLevel& TXCLK() { return m_TXCLK; } // Receive clock, (I) Active high
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Processor::PinLevel& CS0() { return m_CS0; } // Chip select, bit 0, (I) Active high
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Processor::PinLevel& CS1() { return m_CS1; } // Chip select, bit 1, (I) Active high
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Processor::PinLevel& CS2() { return m_CS2; } // Chip select, bit 2, (I) Active low
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Processor::PinLevel& RS() { return m_RS; } // Register select, (I) Active high
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Processor::PinLevel& RW() { return m_RW; } // Read/Write, (I) Read high, write low
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PinLevel& CS0() { return m_CS0; } // Chip select, bit 0, (I) Active high
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PinLevel& CS1() { return m_CS1; } // Chip select, bit 1, (I) Active high
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PinLevel& CS2() { return m_CS2; } // Chip select, bit 2, (I) Active low
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Processor::PinLevel& E() { return m_E; } // ACIA Enable, (I) Active high
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Processor::PinLevel& IRQ() { return m_IRQ; } // Interrupt request, (O) Active low
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PinLevel& RS() { return m_RS; } // Register select, (I) Active high
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PinLevel& RW() { return m_RW; } // Read/Write, (I) Read high, write low
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PinLevel& E() { return m_E; } // ACIA Enable, (I) Active high
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PinLevel& IRQ() { return m_IRQ; } // Interrupt request, (O) Active low
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uint8_t& DATA() { return m_data; } // Data, (I/O)
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void step(int cycles);
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private:
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Processor::PinLevel m_RXDATA;
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Processor::PinLevel m_TXDATA;
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bool selected();
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Processor::PinLevel m_RTS;
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Processor::PinLevel m_CTS;
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Processor::PinLevel m_DCD;
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void reset();
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Processor::PinLevel m_RXCLK;
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Processor::PinLevel m_TXCLK;
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void step();
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PinLevel m_RXDATA;
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PinLevel m_TXDATA;
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PinLevel m_RTS;
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PinLevel m_CTS;
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PinLevel m_DCD;
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PinLevel m_RXCLK;
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PinLevel m_TXCLK;
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PinLevel m_CS0;
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PinLevel m_CS1;
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PinLevel m_CS2;
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PinLevel m_RS;
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PinLevel m_RW;
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PinLevel m_E;
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PinLevel m_IRQ;
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uint8_t m_data;
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Processor::PinLevel m_CS0;
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Processor::PinLevel m_CS1;
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Processor::PinLevel m_CS2;
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// Control registers
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int m_counterDivide;
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int m_wordConfiguration;
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int m_transmitterControl;
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int m_receiveControl;
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Processor::PinLevel m_RS;
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Processor::PinLevel m_RW;
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Processor::PinLevel m_E;
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Processor::PinLevel m_IRQ;
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// Status registers
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bool m_RDRF;
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};
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}
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