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-rw-r--r--src/devices/cpu/cosmac/cosdasm.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/devices/cpu/cosmac/cosdasm.h b/src/devices/cpu/cosmac/cosdasm.h
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+++ b/src/devices/cpu/cosmac/cosdasm.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/***************************************************************************
+
+ cosdasm.c
+
+ Simple RCA COSMAC disassembler.
+ Written by Curt Coder
+
+***************************************************************************/
+
+#ifndef MAME_CPU_COSMAC_COSDASM_H
+#define MAME_CPU_COSMAC_COSDASM_H
+
+#pragma once
+
+class cosmac_disassembler : public util::disasm_interface
+{
+public:
+ enum
+ {
+ TYPE_1801,
+ TYPE_1802
+ };
+
+ cosmac_disassembler(int variant);
+ virtual ~cosmac_disassembler() = default;
+
+ virtual u32 opcode_alignment() const override;
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ int m_variant;
+
+ offs_t implied(const uint8_t opcode);
+ offs_t immediate(offs_t &pc, const data_buffer &params);
+ offs_t short_branch(offs_t base_pc, offs_t &pc, const data_buffer &params);
+ offs_t long_branch(offs_t &pc, const data_buffer &params);
+ offs_t short_skip(offs_t pc);
+ offs_t long_skip(offs_t pc);
+};
+
+#endif