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[patinho] Implement PLAX instruction (jump to indexed address)

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This commit is contained in:
Felipe Corrêa da Silva Sanches 2015-11-30 15:08:24 -02:00
parent f387764de1
commit 3e7b0c6fa9
1 changed files with 7 additions and 0 deletions
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7
src/devices/cpu/patinhofeio/patinho_feio.cpp
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@ -359,6 +359,13 @@ void patinho_feio_cpu_device::execute_instruction()
INCREMENT_PC_4K;
PC = addr;
return;
case 0x10:
//PLAX = "Pula indexado": Jump to indexed address
value = (opcode & 0x0F) << 8 | READ_BYTE_PATINHO(PC);
INCREMENT_PC_4K;
m_idx = READ_INDEX_REG();
PC = compute_effective_address(m_idx + value);
return;
case 0x20:
//ARM = "Armazena": Store the value of the accumulator into a given memory position
addr = compute_effective_address((opcode & 0x0F) << 8 | READ_BYTE_PATINHO(PC));