/*************************************************************************** n2a03.h 6502, NES variant **************************************************************************** Copyright Olivier Galibert All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY OLIVIER GALIBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #ifndef __N2A03_H__ #define __N2A03_H__ #include "m6502.h" class n2a03_device : public m6502_device { public: n2a03_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); static const disasm_entry disasm_entries[0x100]; virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options); virtual void do_exec_full(); virtual void do_exec_partial(); protected: class mi_2a03_normal : public memory_interface { public: virtual ~mi_2a03_normal() {} virtual UINT8 read(UINT16 adr); virtual UINT8 read_direct(UINT16 adr); virtual UINT8 read_decrypted(UINT16 adr); virtual void write(UINT16 adr, UINT8 val); }; class mi_2a03_nd : public memory_interface { public: virtual ~mi_2a03_nd() {} virtual UINT8 read(UINT16 adr); virtual UINT8 read_direct(UINT16 adr); virtual UINT8 read_decrypted(UINT16 adr); virtual void write(UINT16 adr, UINT8 val); }; virtual void device_start(); #define O(o) void o ## _full(); void o ## _partial() // n2a03 opcodes - same as 6502 with D disabled O(adc_nd_aba); O(adc_nd_abx); O(adc_nd_aby); O(adc_nd_idx); O(adc_nd_idy); O(adc_nd_imm); O(adc_nd_zpg); O(adc_nd_zpx); O(arr_nd_imm); O(isb_nd_aba); O(isb_nd_abx); O(isb_nd_aby); O(isb_nd_idx); O(isb_nd_idy); O(isb_nd_zpg); O(isb_nd_zpx); O(rra_nd_aba); O(rra_nd_abx); O(rra_nd_aby); O(rra_nd_idx); O(rra_nd_idy); O(rra_nd_zpg); O(rra_nd_zpx); O(sbc_nd_aba); O(sbc_nd_abx); O(sbc_nd_aby); O(sbc_nd_idx); O(sbc_nd_idy); O(sbc_nd_imm); O(sbc_nd_zpg); O(sbc_nd_zpx); #undef O }; #define N2A03_DEFAULTCLOCK (21477272.724 / 12) enum { N2A03_IRQ_LINE = m6502_device::IRQ_LINE, N2A03_APU_IRQ_LINE = m6502_device::APU_IRQ_LINE, N2A03_NMI_LINE = m6502_device::NMI_LINE, N2A03_SET_OVERFLOW = m6502_device::V_LINE, }; extern const device_type N2A03; #endif