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6809 Disassembly: Addressing mode: immediate byte added. More instructions decoded.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2018-08-27 13:11:43 +01:00
parent dfc4c49454
commit fbc743a608
2 changed files with 17 additions and 6 deletions
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1
MC6809/inc/Disassembly.h
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@ -48,6 +48,7 @@ namespace EightBit {
std::string Address_indexed(std::string mnemomic);
std::string AM_immediate_byte(std::string mnemomic);
std::string AM_immediate_word(std::string mnemomic);
std::string dump_Byte(uint16_t address);

22
MC6809/src/Disassembly.cpp
View File

@ -244,7 +244,7 @@ std::string EightBit::Disassembly::disassembleUnprefixed() {
//// DEC
//case 0x0a: BUS().write(dec(AM_direct_byte())); break; // DEC (direct)
//case 0x4a: A() = dec(A()); break; // DEC (DECA inherent)
case 0x4a: output << "\tDECA"; break; // DEC (DECA inherent)
//case 0x5a: B() = dec(B()); break; // DEC (DECB inherent)
//case 0x6a: BUS().write(dec(AM_indexed_byte())); break; // DEC (indexed)
//case 0x7a: BUS().write(dec(AM_extended_byte())); break; // DEC (extended)
@ -286,7 +286,7 @@ std::string EightBit::Disassembly::disassembleUnprefixed() {
//// LD
//// LDA
//case 0x86: A() = ld(AM_immediate_byte()); break; // LD (LDA immediate)
case 0x86: output << AM_immediate_byte("LDA"); break; // LD (LDA immediate)
//case 0x96: A() = ld(AM_direct_byte()); break; // LD (LDA direct)
//case 0xa6: A() = ld(AM_indexed_byte()); break; // LD (LDA indexed)
//case 0xb6: A() = ld(AM_extended_byte()); break; // LD (LDA extended)
@ -298,7 +298,7 @@ std::string EightBit::Disassembly::disassembleUnprefixed() {
//case 0xf6: B() = ld(AM_extended_byte()); break; // LD (LDB extended)
//// LDD
//case 0xcc: D() = ld(AM_immediate_word()); break; // LD (LDD immediate)
case 0xcc: output << AM_immediate_word("LDD"); break; // LD (LDD immediate)
//case 0xdc: D() = ld(AM_direct_word()); break; // LD (LDD direct)
//case 0xec: D() = ld(AM_indexed_word()); break; // LD (LDD indexed)
//case 0xfc: D() = ld(AM_extended_word()); break; // LD (LDD extended)
@ -407,12 +407,12 @@ std::string EightBit::Disassembly::disassembleUnprefixed() {
//// STA
//case 0x97: BUS().write(Address_direct(), st(A())); break; // ST (STA direct)
//case 0xa7: BUS().write(Address_indexed(), st(A())); break; // ST (STA indexed)
case 0xa7: output << Address_indexed("STA"); break; // ST (STA indexed)
//case 0xb7: BUS().write(Address_extended(), st(A())); break; // ST (STA extended)
//// STB
//case 0xd7: BUS().write(Address_direct(), st(B())); break; // ST (STB direct)
//case 0xe7: BUS().write(Address_indexed(), st(B())); break; // ST (STB indexed)
case 0xe7: output << Address_indexed("STB"); break; // ST (STB indexed)
//case 0xf7: BUS().write(Address_extended(), st(B())); break; // ST (STB extended)
//// STD
@ -701,13 +701,23 @@ std::string EightBit::Disassembly::Address_indexed(std::string mnemomic) {
////
std::string EightBit::Disassembly::AM_immediate_byte(std::string mnemomic) {
std::ostringstream output;
const auto byte = getByte(++m_address);
output
<< dump_ByteValue(byte)
<< "\t" << mnemomic << "\t"
<< "#$" << dump_ByteValue(byte);
return output.str();
}
std::string EightBit::Disassembly::AM_immediate_word(std::string mnemomic) {
std::ostringstream output;
const auto word = getWord(++m_address);
output
<< dump_WordValue(word)
<< "\t" << mnemomic << "\t"
<< "#" << dump_WordValue(word);
<< "#$" << dump_WordValue(word);
return output.str();
}