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annotate z80_to_x86.h @ 963:bd549b25c362

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Not so successful attempt at improved PSG resampling
author Michael Pavone <pavone@retrodev.com>
date Tue, 19 Apr 2016 00:38:44 -0700
parents 252dfd29831d
children 1eb616b8cbe9
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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 Z80_TO_X86_H_
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7 #define Z80_TO_X86_H_
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8 #include "z80inst.h"
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9 #include "backend.h"
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10
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11 #define ZNUM_MEM_AREAS 4
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12 #ifdef Z80_LOG_ADDRESS
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13 #define ZMAX_NATIVE_SIZE 255
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14 #else
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15 #define ZMAX_NATIVE_SIZE 128
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16 #endif
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17
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18 enum {
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19 ZF_C = 0,
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20 ZF_N,
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21 ZF_PV,
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22 ZF_H,
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23 ZF_Z,
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24 ZF_S,
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25 ZF_NUM
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26 };
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27
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28 typedef void (*z80_run_fun)(void * context);
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29
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30 typedef struct {
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31 cpu_options gen;
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32 code_ptr save_context_scratch;
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33 code_ptr load_context_scratch;
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34 code_ptr native_addr;
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35 code_ptr retrans_stub;
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36 code_ptr do_sync;
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37 code_ptr read_8;
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38 code_ptr write_8;
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39 code_ptr read_8_noinc;
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40 code_ptr write_8_noinc;
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41 code_ptr read_16;
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42 code_ptr write_16_highfirst;
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43 code_ptr write_16_lowfirst;
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44 code_ptr read_io;
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45 code_ptr write_io;
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46
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47 uint32_t flags;
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48 int8_t regs[Z80_UNUSED];
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49 z80_run_fun run;
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50 } z80_options;
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51
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52 typedef struct {
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53 void * native_pc;
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54 uint16_t sp;
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55 uint8_t flags[ZF_NUM];
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56 uint16_t bank_reg;
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57 uint8_t regs[Z80_A+1];
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58 uint8_t im;
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59 uint8_t alt_regs[Z80_A+1];
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60 uint32_t target_cycle;
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61 uint32_t current_cycle;
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62 uint8_t alt_flags[ZF_NUM];
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63 uint8_t * mem_pointers[ZNUM_MEM_AREAS];
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64 uint8_t iff1;
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65 uint8_t iff2;
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66 uint16_t scratch1;
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67 uint16_t scratch2;
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68 void * extra_pc;
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69 uint32_t sync_cycle;
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70 uint32_t int_cycle;
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71 native_map_slot * static_code_map;
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72 native_map_slot * banked_code_map;
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73 z80_options * options;
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74 void * system;
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75 uint8_t ram_code_flags[(8 * 1024)/128/8];
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76 uint32_t int_enable_cycle;
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77 uint16_t pc;
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78 uint32_t int_pulse_start;
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79 uint32_t int_pulse_end;
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80 uint8_t breakpoint_flags[(16 * 1024)/sizeof(uint8_t)];
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81 uint8_t * bp_handler;
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82 uint8_t * bp_stub;
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83 uint8_t * interp_code[256];
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84 uint8_t reset;
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85 uint8_t busreq;
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86 uint8_t busack;
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87 } z80_context;
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88
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89 void translate_z80_stream(z80_context * context, uint32_t address);
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90 void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks, memmap_chunk const * io_chunks, uint32_t num_io_chunks, uint32_t clock_divider);
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91 void z80_options_free(z80_options *opts);
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92 void init_z80_context(z80_context * context, z80_options * options);
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93 code_ptr z80_get_native_address(z80_context * context, uint32_t address);
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94 code_ptr z80_get_native_address_trans(z80_context * context, uint32_t address);
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95 z80_context * z80_handle_code_write(uint32_t address, z80_context * context);
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96 void z80_reset(z80_context * context);
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97 void zinsert_breakpoint(z80_context * context, uint16_t address, uint8_t * bp_handler);
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98 void zremove_breakpoint(z80_context * context, uint16_t address);
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99 void z80_run(z80_context * context, uint32_t target_cycle);
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100 void z80_assert_reset(z80_context * context, uint32_t cycle);
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101 void z80_clear_reset(z80_context * context, uint32_t cycle);
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102 void z80_assert_busreq(z80_context * context, uint32_t cycle);
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103 void z80_clear_busreq(z80_context * context, uint32_t cycle);
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104 uint8_t z80_get_busack(z80_context * context, uint32_t cycle);
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105 void z80_adjust_cycles(z80_context * context, uint32_t deduction);
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106 //to be provided by system code
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107 void z80_next_int_pulse(z80_context * z_context);
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109 #endif //Z80_TO_X86_H_
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110