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[patinho] Implement XOR, NAND and SOMI instructions and fix their disasm textual representation

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This commit is contained in:
Felipe Corrêa da Silva Sanches 2015-11-30 16:59:01 -02:00
parent 9b032d452c
commit 1e9ed2e3c5
2 changed files with 23 additions and 4 deletions
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19
src/devices/cpu/patinhofeio/patinho_feio.cpp
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@ -121,6 +121,25 @@ void patinho_feio_cpu_device::execute_instruction()
m_scheduled_IND_bit_reset = true; m_scheduled_IND_bit_reset = true;
switch (opcode){ switch (opcode){
case 0xD2:
//XOR: Computes the bitwise XOR of an immediate into the accumulator
ACC ^= READ_BYTE_PATINHO(PC);
INCREMENT_PC_4K;
//TODO: update T and V flags
return;
case 0xD4:
//NAND: Computes the bitwise XOR of an immediate into the accumulator
ACC = ~(ACC & READ_BYTE_PATINHO(PC));
INCREMENT_PC_4K;
//TODO: update T and V flags
return;
case 0xD8:
//SOMI="Soma Imediato":
// Add an immediate into the accumulator
ACC += READ_BYTE_PATINHO(PC);
INCREMENT_PC_4K;
//TODO: update T and V flags
return;
case 0xDA: case 0xDA:
//CARI="Carrega Imediato": //CARI="Carrega Imediato":
// Load an immediate into the accumulator // Load an immediate into the accumulator

8
src/devices/cpu/patinhofeio/patinho_feio_dasm.cpp
View File

@ -128,10 +128,10 @@ CPU_DISASSEMBLE( patinho_feio )
case 0x80: sprintf (buffer, "DDS /%01X", value); return 2; //DDS = "Deslocamento para a direita com duplicacao de sinal": Shift right with sign duplication case 0x80: sprintf (buffer, "DDS /%01X", value); return 2; //DDS = "Deslocamento para a direita com duplicacao de sinal": Shift right with sign duplication
} }
break; break;
case 0x02: sprintf (buffer, "XOR /%02X", value); return 2; //Logical XOR case 0x02: sprintf (buffer, "XOR /%02X", oprom[1]); return 2; //Logical XOR
case 0x04: sprintf (buffer, "NAND /%02X", value); return 2; //Logical NAND case 0x04: sprintf (buffer, "NAND /%02X", oprom[1]); return 2; //Logical NAND
case 0x08: sprintf (buffer, "SOMI /%02X", value); return 2; //SOMI = "Soma imediata": Add immediate value into accumulator case 0x08: sprintf (buffer, "SOMI /%02X", oprom[1]); return 2; //SOMI = "Soma imediata": Add immediate value into accumulator
case 0x0A: sprintf (buffer, "CARI /%02X", value); return 2; //CARI = "Carrega imediato": Loads an immediate value into the accumulator case 0x0A: sprintf (buffer, "CARI /%02X", oprom[1]); return 2; //CARI = "Carrega imediato": Loads an immediate value into the accumulator
} }
break; break;
case 0xE0: case 0xE0: