git.sur5r.net Git - cc65/blob - src/sim65/chips/stdio.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                  stdio.c                                  */
   4 /*                                                                           */
   5 /*                 STDIO plugin for the sim65 6502 simulator                 */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2002-2003 Ullrich von Bassewitz                                       */
  10 /*               Römerstrasse 52                                             */
  11 /*               D-70794 Filderstadt                                         */
  12 /* EMail:        uz@cc65.org                                                 */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 /* common */
  41 #include "attrib.h"
  42
  43 /* sim65 */
  44 #include "chipif.h"
  45
  46
  47
  48 /*****************************************************************************/
  49 /*                                   Forwards                                */
  50 /*****************************************************************************/
  51
  52
  53
  54 static int InitChip (const struct SimData* Data);
  55 /* Initialize the chip, return an error code */
  56
  57 static void* CreateInstance (unsigned Addr, unsigned Range, void* CfgInfo);
  58 /* Create a new chip instance */
  59
  60 static void DestroyInstance (void* Data);
  61 /* Destroy a chip instance */
  62
  63 static void Write (void* Data, unsigned Offs, unsigned char Val);
  64 /* Write user data */
  65
  66 static unsigned char Read (void* Data, unsigned Offs);
  67 /* Read user data */
  68
  69
  70
  71 /*****************************************************************************/
  72 /*                                     Data                                  */
  73 /*****************************************************************************/
  74
  75
  76
  77 /* Control data passed to the main program */
  78 static const struct ChipData CData[1] = {
  79     {
  80         "STDIO",                /* Name of the chip */
  81         CHIPDATA_TYPE_CHIP,     /* Type of the chip */
  82         CHIPDATA_VER_MAJOR,     /* Version information */
  83         CHIPDATA_VER_MINOR,
  84
  85         /* -- Exported functions -- */
  86         InitChip,
  87         CreateInstance,
  88         DestroyInstance,
  89         Write,
  90         Write,
  91         Read,
  92         Read
  93     }
  94 };
  95
  96 /* The SimData pointer we get when InitChip is called */
  97 static const SimData* Sim;
  98
  99
 100
 101 /*****************************************************************************/
 102 /*                               Exported function                           */
 103 /*****************************************************************************/
 104
 105
 106
 107 int GetChipData (const ChipData** Data, unsigned* Count)
 108 {
 109     /* Pass the control structure to the caller */
 110     *Data = CData;
 111     *Count = sizeof (CData) / sizeof (CData[0]);
 112
 113     /* Call was successful */
 114     return 0;
 115 }
 116
 117
 118
 119 /*****************************************************************************/
 120 /*                                     Code                                  */
 121 /*****************************************************************************/
 122
 123
 124
 125 static int InitChip (const struct SimData* Data)
 126 /* Initialize the chip, return an error code */
 127 {
 128     /* Remember the pointer */
 129     Sim = Data;
 130
 131     /* Always successful */
 132     return 0;
 133 }
 134
 135
 136
 137 static void* CreateInstance (unsigned Addr, unsigned Range, void* CfgInfo)
 138 /* Initialize a new chip instance */
 139 {
 140     /* We don't need any instance data */
 141     return 0;
 142 }
 143
 144
 145
 146 static void DestroyInstance (void* Data)
 147 /* Destroy a chip instance */
 148 {
 149 }
 150
 151
 152
 153 static void Write (void* Data attribute ((unused)),
 154                    unsigned Offs attribute ((unused)),
 155                    unsigned char Val)
 156 /* Write user data */
 157 {
 158     putchar (Val);
 159 }
 160
 161
 162
 163 static unsigned char Read (void* Data attribute ((unused)),
 164                            unsigned Offs attribute ((unused)))
 165 /* Read user data */
 166 {
 167     /* Read a character and return the value */
 168     return getchar ();
 169 }
 170
 171
 172
 173