apps/plugins/zxbox/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 #include "zxconfig.h"
  25 #include "config.h"
  26
  27 #ifdef ROCKBOX_BIG_ENDIAN
  28 #define WORDS_BIGENDIAN
  29 #endif
  30
  31 #ifndef COMPARISON
  32 #define PRNM(x) z80_ ## x
  33 #else
  34 #define PRNM(x) z80x_ ## x
  35 #endif
  36
  37 #define DANM(x) PRNM(proc).x
  38
  39 #include "z80_type.h"
  40
  41
  42 #ifndef WORDS_BIGENDIAN
  43 union dregp {
  44   struct { byte l, h, _b2, _b3; } s;
  45   struct { dbyte d, _d1; }        d;
  46   byte*                           p;
  47 };
  48 #else
  49 union dregp {
  50   struct { byte _b3, _b2, h, l; } s;
  51   struct { dbyte _d1, d; }        d;
  52   byte*                           p;
  53 };
  54 #endif
  55
  56 #define NUMDREGS  9
  57 #define BACKDREGS 4
  58
  59 #define PORTNUM 256
  60
  61 /* Do NOT change the order! */
  62 typedef struct {
  63   union dregp nr[NUMDREGS];
  64   union dregp br[BACKDREGS];
  65
  66   int haltstate;
  67   int it_mode;
  68   int iff1, iff2;
  69
  70   byte *mem;
  71
  72   int tc;
  73   int rl7;
  74
  75 #ifdef SPECT_MEM       /* WARNING: Do NOT change the order!!! */
  76   int next_scri;
  77   int inport_mask;
  78   int ula_inport;
  79   int ula_outport;
  80   int sound_sam;
  81   int sound_change;
  82   int imp_change;
  83 #endif
  84
  85 #ifdef Z80C
  86   dbyte cbaddr;
  87
  88 #ifdef PROCP
  89   byte *incf_tbl;
  90   byte *decf_tbl;
  91   byte *addf_tbl;
  92   byte *subf_tbl;
  93   byte *orf_tbl;
  94
  95   byte *inports;
  96   byte *outports;
  97 #ifdef SPECT_MEM
  98   byte *fe_inport_high;
  99 #endif
 100 #endif
 101 #endif
 102
 103 } Z80;
 104
 105
 106 extern Z80 PRNM(proc);
 107
 108 extern byte PRNM(inports)[];
 109 extern byte PRNM(outports)[];
 110
 111 #define ZI_BC 0
 112 #define ZI_DE 1
 113 #define ZI_HL 2
 114 #define ZI_AF 3
 115 #define ZI_IR 4
 116 #define ZI_IX 5
 117 #define ZI_IY 6
 118 #define ZI_PC 7
 119 #define ZI_SP 8
 120
 121
 122 #define BC  (DANM(nr)[ZI_BC].d.d)
 123 #define DE  (DANM(nr)[ZI_DE].d.d)
 124 #define HL  (DANM(nr)[ZI_HL].d.d)
 125 #define AF  (DANM(nr)[ZI_AF].d.d)
 126 #define IR  (DANM(nr)[ZI_IR].d.d)
 127 #define IX  (DANM(nr)[ZI_IX].d.d)
 128 #define IY  (DANM(nr)[ZI_IY].d.d)
 129 #define PC  (DANM(nr)[ZI_PC].d.d)
 130 #define SP  (DANM(nr)[ZI_SP].d.d)
 131
 132 #define BCP (DANM(nr)[ZI_BC].p)
 133 #define DEP (DANM(nr)[ZI_DE].p)
 134 #define HLP (DANM(nr)[ZI_HL].p)
 135 #define PCP (DANM(nr)[ZI_PC].p)
 136 #define SPP (DANM(nr)[ZI_SP].p)
 137 #define IXP (DANM(nr)[ZI_IX].p)
 138 #define IYP (DANM(nr)[ZI_IY].p)
 139
 140
 141 #define RB  (DANM(nr)[ZI_BC].s.h)
 142 #define RC  (DANM(nr)[ZI_BC].s.l)
 143 #define RD  (DANM(nr)[ZI_DE].s.h)
 144 #define RE  (DANM(nr)[ZI_DE].s.l)
 145 #define RH  (DANM(nr)[ZI_HL].s.h)
 146 #define RL  (DANM(nr)[ZI_HL].s.l)
 147 #define RA  (DANM(nr)[ZI_AF].s.h)
 148 #define RF  (DANM(nr)[ZI_AF].s.l)
 149 #define RI  (DANM(nr)[ZI_IR].s.h)
 150 #define RR  (DANM(nr)[ZI_IR].s.l)
 151 #define XH  (DANM(nr)[ZI_IX].s.h)
 152 #define XL  (DANM(nr)[ZI_IX].s.l)
 153 #define YH  (DANM(nr)[ZI_IY].s.h)
 154 #define YL  (DANM(nr)[ZI_IY].s.l)
 155 #define PCH (DANM(nr)[ZI_PC].s.h)
 156 #define PCL (DANM(nr)[ZI_PC].s.l)
 157 #define SPH (DANM(nr)[ZI_SP].s.h)
 158 #define SPL (DANM(nr)[ZI_SP].s.l)
 159
 160 #define BCBK (DANM(br)[ZI_BC].d.d)
 161 #define DEBK (DANM(br)[ZI_DE].d.d)
 162 #define HLBK (DANM(br)[ZI_HL].d.d)
 163 #define AFBK (DANM(br)[ZI_AF].d.d)
 164
 165 #define BBK  (DANM(br)[ZI_BC].s.h)
 166 #define CBK  (DANM(br)[ZI_BC].s.l)
 167 #define DBK  (DANM(br)[ZI_DE].s.h)
 168 #define EBK  (DANM(br)[ZI_DE].s.l)
 169 #define HBK  (DANM(br)[ZI_HL].s.h)
 170 #define LBK  (DANM(br)[ZI_HL].s.l)
 171 #define ABK  (DANM(br)[ZI_AF].s.h)
 172 #define FBK  (DANM(br)[ZI_AF].s.l)
 173
 174 #ifdef __cplusplus
 175 extern "C" {
 176 #endif
 177
 178 extern void PRNM(init)(void);
 179 extern int  PRNM(step)(int ticknum);
 180
 181 extern void PRNM(interrupt)(int data);
 182 extern void PRNM(nmi)(void);
 183 extern void PRNM(reset)(void);
 184
 185 extern void PRNM(pushpc)(void);
 186 extern void PRNM(local_init)(void);
 187
 188 #ifdef __cplusplus
 189 }
 190 #endif
 191
 192
 193 #endif /* Z80_H */