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[patinho] Implement ARM and ARMX instructions

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This commit is contained in:
Felipe Corrêa da Silva Sanches 2015-11-30 12:46:48 -02:00
parent 5c4e4a375d
commit a35a7a34a6
1 changed files with 13 additions and 0 deletions
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13
src/devices/cpu/patinhofeio/patinho_feio.cpp
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@ -332,6 +332,19 @@ void patinho_feio_cpu_device::execute_instruction()
INCREMENT_PC_4K;
PC = addr;
return;
case 0x20:
//ARM = "Armazena": Store the value of the accumulator into a given memory position
addr = (opcode & 0x0F) << 8 | READ_BYTE_PATINHO(PC);
INCREMENT_PC_4K;
WRITE_BYTE_PATINHO(addr, ACC);
return;
case 0x30:
//ARMX = "Armazena indexado": Store the value of the accumulator into a given indexed memory position
addr = (opcode & 0x0F) << 8 | READ_BYTE_PATINHO(PC);
INCREMENT_PC_4K;
m_idx = READ_INDEX_REG();
WRITE_BYTE_PATINHO(m_idx + addr, ACC);
return;
case 0xF0:
//PUG = "Pula e guarda": Jump and store.
// It stores the return address to addr and addr+1