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annotate genesis.h @ 1374:8f404b1fa572

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Go back to resetting the refresh counter after a DMA. Probably not quite correct as it is probably reset on VDP triggered refresh, but this is close enough for now given the general limitations with my refresh code. VDP FIFO Testing seems to be passing 100% reliably again (was occassionally failing still with the last commit)
author Michael Pavone <pavone@retrodev.com>
date Tue, 23 May 2017 23:47:40 -0700
parents 30123ca5856c
children efa7225e0f07
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #ifndef GENESIS_H_
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7 #define GENESIS_H_
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9 #include <stdint.h>
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10 #include "system.h"
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11 #include "m68k_core.h"
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12 #include "z80_to_x86.h"
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13 #include "ym2612.h"
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14 #include "vdp.h"
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15 #include "psg.h"
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16 #include "io.h"
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17 #include "romdb.h"
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18 #include "arena.h"
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19
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20 typedef struct genesis_context genesis_context;
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21
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22 struct genesis_context {
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23 system_header header;
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24 m68k_context *m68k;
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25 z80_context *z80;
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26 vdp_context *vdp;
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27 ym2612_context *ym;
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28 psg_context *psg;
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29 uint16_t *cart;
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30 uint16_t *lock_on;
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31 uint16_t *work_ram;
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32 uint8_t *zram;
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33 void *extra;
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34 uint8_t *save_storage;
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35 eeprom_map *eeprom_map;
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36 uint32_t num_eeprom;
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37 uint32_t save_size;
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38 uint32_t save_ram_mask;
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39 uint32_t master_clock; //Current master clock value
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40 uint32_t normal_clock; //Normal master clock (used to restore master clock after turbo mode)
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41 uint32_t frame_end;
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42 uint32_t max_cycles;
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43 uint32_t int_latency_prev1;
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44 uint32_t int_latency_prev2;
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45 uint8_t bank_regs[8];
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46 uint16_t mapper_start_index;
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47 uint8_t save_type;
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48 sega_io io;
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49 uint8_t version_reg;
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50 uint8_t bus_busy;
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51 uint8_t reset_requested;
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52 eeprom_state eeprom;
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53 };
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55 #define RAM_WORDS 32 * 1024
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56 #define Z80_RAM_BYTES 8 * 1024
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58 uint16_t read_dma_value(uint32_t address);
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59 m68k_context * sync_components(m68k_context *context, uint32_t address);
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60 genesis_context *alloc_config_genesis(void *rom, uint32_t rom_size, void *lock_on, uint32_t lock_on_size, uint32_t system_opts, uint8_t force_region, rom_info *info_out);
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62 #endif //GENESIS_H_
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