sdcc-extra/emu/rrz80/cpu/z80.h

   1 /*
   2  * Copyright (C) 1996-1998 Szeredi Miklos
   3  * Email: mszeredi@inf.bme.hu
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version. See the file COPYING.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  */
  20
  21 #ifndef Z80_H
  22 #define Z80_H
  23
  24 #ifdef HAVE_CONFIG_H
  25 #  include "config.h"
  26 #elif defined(__BIG_ENDIAN__)
  27    /* defined by preprocessor */
  28 #  define WORDS_BIGENDIAN
  29 #elif !defined(__LITTLE_ENDIAN__)
  30    /* try with types.h and endian.h */
  31    /* Hack: GYGWIN doesn't have endian.h, but we know it is LITTLE ENDIAN */
  32 #  ifndef __CYGWIN__
  33 #    include <sys/types.h>
  34 #    if defined(_BIG_ENDIAN)
  35 #      define WORDS_BIGENDIAN
  36 #    elif !defined(_LITTLE_ENDIAN)
  37 #      include <endian.h>
  38 #      if BYTE_ORDER == BIG_ENDIAN
  39 #        define WORDS_BIGENDIAN
  40 #      endif
  41 #    endif
  42 #  endif
  43 #endif
  44
  45 #ifndef COMPARISON
  46 #define PRNM(x) z80_ ## x
  47 #else
  48 #define PRNM(x) z80x_ ## x
  49 #endif
  50
  51 #define DANM(x) PRNM(proc).x
  52
  53 #include "z80_type.h"
  54
  55
  56 #ifndef WORDS_BIGENDIAN
  57 union dregp {
  58   struct { byte l, h, _b2, _b3; } s;
  59   struct { dbyte d, _d1; }        d;
  60   byte*                           p;
  61 };
  62 #else
  63 union dregp {
  64   struct { byte _b3, _b2, h, l; } s;
  65   struct { dbyte _d1, d; }        d;
  66   byte*                           p;
  67 };
  68 #endif
  69
  70 #define NUMDREGS  9
  71 #define BACKDREGS 4
  72
  73 #define PORTNUM 256
  74
  75 /* Do NOT change the order! */
  76 typedef struct {
  77   union dregp nr[NUMDREGS];
  78   union dregp br[BACKDREGS];
  79
  80   int haltstate;
  81   int it_mode;
  82   int iff1, iff2;
  83
  84   byte *mem;
  85
  86   int tc;
  87   int rl7;
  88
  89 #ifdef SPECT_MEM       /* WARNING: Do NOT change the order!!! */
  90   int next_scri;
  91   int inport_mask;
  92   int ula_inport;
  93   int ula_outport;
  94   int sound_sam;
  95   int sound_change;
  96   int imp_change;
  97   int pc_speaker;
  98 #endif
  99
 100 #ifdef Z80C
 101   dbyte cbaddr;
 102
 103 #ifdef PROCP
 104   byte *incf_tbl;
 105   byte *decf_tbl;
 106   byte *addf_tbl;
 107   byte *subf_tbl;
 108   byte *orf_tbl;
 109
 110   byte *inports;
 111   byte *outports;
 112 #ifdef SPECT_MEM
 113   byte *fe_inport_high;
 114 #endif
 115 #endif
 116 #endif
 117
 118 } Z80;
 119
 120
 121 extern Z80 PRNM(proc);
 122
 123 extern byte PRNM(inports)[];
 124 extern byte PRNM(outports)[];
 125
 126 #define ZI_BC 0
 127 #define ZI_DE 1
 128 #define ZI_HL 2
 129 #define ZI_AF 3
 130 #define ZI_IR 4
 131 #define ZI_IX 5
 132 #define ZI_IY 6
 133 #define ZI_PC 7
 134 #define ZI_SP 8
 135
 136
 137 #define BC  (DANM(nr)[ZI_BC].d.d)
 138 #define DE  (DANM(nr)[ZI_DE].d.d)
 139 #define HL  (DANM(nr)[ZI_HL].d.d)
 140 #define AF  (DANM(nr)[ZI_AF].d.d)
 141 #define IR  (DANM(nr)[ZI_IR].d.d)
 142 #define IX  (DANM(nr)[ZI_IX].d.d)
 143 #define IY  (DANM(nr)[ZI_IY].d.d)
 144 #define PC  (DANM(nr)[ZI_PC].d.d)
 145 #define SP  (DANM(nr)[ZI_SP].d.d)
 146
 147 #define BCP (DANM(nr)[ZI_BC].p)
 148 #define DEP (DANM(nr)[ZI_DE].p)
 149 #define HLP (DANM(nr)[ZI_HL].p)
 150 #define PCP (DANM(nr)[ZI_PC].p)
 151 #define SPP (DANM(nr)[ZI_SP].p)
 152 #define IXP (DANM(nr)[ZI_IX].p)
 153 #define IYP (DANM(nr)[ZI_IY].p)
 154
 155
 156 #define RB  (DANM(nr)[ZI_BC].s.h)
 157 #define RC  (DANM(nr)[ZI_BC].s.l)
 158 #define RD  (DANM(nr)[ZI_DE].s.h)
 159 #define RE  (DANM(nr)[ZI_DE].s.l)
 160 #define RH  (DANM(nr)[ZI_HL].s.h)
 161 #define RL  (DANM(nr)[ZI_HL].s.l)
 162 #define RA  (DANM(nr)[ZI_AF].s.h)
 163 #define RF  (DANM(nr)[ZI_AF].s.l)
 164 #define RI  (DANM(nr)[ZI_IR].s.h)
 165 #define RR  (DANM(nr)[ZI_IR].s.l)
 166 #define XH  (DANM(nr)[ZI_IX].s.h)
 167 #define XL  (DANM(nr)[ZI_IX].s.l)
 168 #define YH  (DANM(nr)[ZI_IY].s.h)
 169 #define YL  (DANM(nr)[ZI_IY].s.l)
 170 #define PCH (DANM(nr)[ZI_PC].s.h)
 171 #define PCL (DANM(nr)[ZI_PC].s.l)
 172 #define SPH (DANM(nr)[ZI_SP].s.h)
 173 #define SPL (DANM(nr)[ZI_SP].s.l)
 174
 175 #define BCBK (DANM(br)[ZI_BC].d.d)
 176 #define DEBK (DANM(br)[ZI_DE].d.d)
 177 #define HLBK (DANM(br)[ZI_HL].d.d)
 178 #define AFBK (DANM(br)[ZI_AF].d.d)
 179
 180 #define BBK  (DANM(br)[ZI_BC].s.h)
 181 #define CBK  (DANM(br)[ZI_BC].s.l)
 182 #define DBK  (DANM(br)[ZI_DE].s.h)
 183 #define EBK  (DANM(br)[ZI_DE].s.l)
 184 #define HBK  (DANM(br)[ZI_HL].s.h)
 185 #define LBK  (DANM(br)[ZI_HL].s.l)
 186 #define ABK  (DANM(br)[ZI_AF].s.h)
 187 #define FBK  (DANM(br)[ZI_AF].s.l)
 188
 189 #ifdef __cplusplus
 190 extern "C" {
 191 #endif
 192
 193 extern void PRNM(init)(void);
 194 extern int  PRNM(step)(int ticknum);
 195
 196 extern void PRNM(interrupt)(int data);
 197 extern void PRNM(nmi)(void);
 198 extern void PRNM(reset)(void);
 199
 200 extern void PRNM(pushpc)(void);
 201 extern void PRNM(local_init)(void);
 202
 203 #ifdef __cplusplus
 204 }
 205 #endif
 206
 207
 208 #endif /* Z80_H */