mirror of
https://github.com/dborth/snes9xgx.git
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137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/*****
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* SPC7110 emulator - version 0.03 (2008-08-10)
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* Copyright (c) 2008, byuu and neviksti
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* The software is provided "as is" and the author disclaims all warranties
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* with regard to this software including all implied warranties of
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* merchantibility and fitness, in no event shall the author be liable for
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* any special, direct, indirect, or consequential damages or any damages
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* whatsoever resulting from loss of use, data or profits, whether in an
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* action of contract, negligence or other tortious action, arising out of
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* or in connection with the use or performance of this software.
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*****/
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#ifndef _SPC7110EMU_H_
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#define _SPC7110EMU_H_
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#include "spc7110dec.h"
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class SPC7110 {
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public:
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void init();
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void enable();
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void power();
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void reset();
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unsigned datarom_addr(unsigned addr);
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unsigned data_pointer();
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unsigned data_adjust();
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unsigned data_increment();
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void set_data_pointer(unsigned addr);
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void set_data_adjust(unsigned addr);
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void update_time(int offset = 0);
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time_t create_time();
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uint8 mmio_read (unsigned addr);
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void mmio_write(unsigned addr, uint8 data);
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uint8 read (unsigned addr);
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void write(unsigned addr, uint8 data);
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//spc7110decomp
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void decomp_init();
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uint8 decomp_read();
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SPC7110();
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//==================
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//decompression unit
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//==================
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uint8 r4801; //compression table low
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uint8 r4802; //compression table high
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uint8 r4803; //compression table bank
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uint8 r4804; //compression table index
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uint8 r4805; //decompression buffer index low
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uint8 r4806; //decompression buffer index high
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uint8 r4807; //???
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uint8 r4808; //???
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uint8 r4809; //compression length low
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uint8 r480a; //compression length high
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uint8 r480b; //decompression control register
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uint8 r480c; //decompression status
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SPC7110Decomp decomp;
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//==============
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//data port unit
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//==============
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uint8 r4811; //data pointer low
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uint8 r4812; //data pointer high
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uint8 r4813; //data pointer bank
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uint8 r4814; //data adjust low
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uint8 r4815; //data adjust high
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uint8 r4816; //data increment low
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uint8 r4817; //data increment high
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uint8 r4818; //data port control register
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uint8 r481x;
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bool r4814_latch;
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bool r4815_latch;
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//=========
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//math unit
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//=========
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uint8 r4820; //16-bit multiplicand B0, 32-bit dividend B0
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uint8 r4821; //16-bit multiplicand B1, 32-bit dividend B1
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uint8 r4822; //32-bit dividend B2
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uint8 r4823; //32-bit dividend B3
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uint8 r4824; //16-bit multiplier B0
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uint8 r4825; //16-bit multiplier B1
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uint8 r4826; //16-bit divisor B0
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uint8 r4827; //16-bit divisor B1
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uint8 r4828; //32-bit product B0, 32-bit quotient B0
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uint8 r4829; //32-bit product B1, 32-bit quotient B1
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uint8 r482a; //32-bit product B2, 32-bit quotient B2
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uint8 r482b; //32-bit product B3, 32-bit quotient B3
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uint8 r482c; //16-bit remainder B0
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uint8 r482d; //16-bit remainder B1
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uint8 r482e; //math control register
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uint8 r482f; //math status
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//===================
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//memory mapping unit
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//===================
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uint8 r4830; //SRAM write enable
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uint8 r4831; //$[d0-df]:[0000-ffff] mapping
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uint8 r4832; //$[e0-ef]:[0000-ffff] mapping
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uint8 r4833; //$[f0-ff]:[0000-ffff] mapping
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uint8 r4834; //???
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unsigned dx_offset;
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unsigned ex_offset;
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unsigned fx_offset;
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//====================
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//real-time clock unit
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//====================
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uint8 r4840; //RTC latch
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uint8 r4841; //RTC index/data port
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uint8 r4842; //RTC status
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enum RTC_State { RTCS_Inactive, RTCS_ModeSelect, RTCS_IndexSelect, RTCS_Write } rtc_state;
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enum RTC_Mode { RTCM_Linear = 0x03, RTCM_Indexed = 0x0c } rtc_mode;
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unsigned rtc_index;
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static const unsigned months[12];
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};
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#endif
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