src/agbprint.c

   1 // VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
   2 // Copyright (C) 1999-2003 Forgotten
   3 // Copyright (C) 2004 Forgotten and the VBA development team
   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, or(at your option)
   8 // any later version.
   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 Foundation,
  17 // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 #include <stdio.h>
  20 #include <string.h>
  21
  22 #include "GBA.h"
  23 #include "Globals.h"
  24 #include "Port.h"
  25
  26 #define debuggerWriteHalfWord(addr, value) \
  27   WRITE16LE((u16*)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask], (value))
  28
  29 #define debuggerReadHalfWord(addr) \
  30   READ16LE(((u16*)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]))
  31
  32 static bool agbPrintEnabled = false;
  33 static bool agbPrintProtect = false;
  34
  35 bool agbPrintWrite(u32 address, u16 value)
  36 {
  37   if(agbPrintEnabled) {
  38     if(address == 0x9fe2ffe) { // protect
  39       agbPrintProtect = (value != 0);
  40       debuggerWriteHalfWord(address, value);
  41       return true;
  42     } else {
  43       if(agbPrintProtect &&
  44          ((address >= 0x9fe20f8 && address <= 0x9fe20ff) // control structure
  45           || (address >= 0x8fd0000 && address <= 0x8fdffff)
  46           || (address >= 0x9fd0000 && address <= 0x9fdffff))) {
  47         debuggerWriteHalfWord(address, value);
  48         return true;
  49       }
  50     }
  51   }
  52   return false;
  53 }
  54
  55 void agbPrintReset()
  56 {
  57   agbPrintProtect = false;
  58 }
  59
  60 void agbPrintEnable(bool enable)
  61 {
  62   agbPrintEnabled = enable;
  63 }
  64
  65 bool agbPrintIsEnabled()
  66 {
  67   return agbPrintEnabled;
  68 }
  69
  70 extern void (*dbgOutput)(char *, u32);
  71
  72 void agbPrintFlush()
  73 {
  74   u16 get = debuggerReadHalfWord(0x9fe20fc);
  75   u16 put = debuggerReadHalfWord(0x9fe20fe);
  76
  77   u32 address = (debuggerReadHalfWord(0x9fe20fa) << 16);
  78   if(address != 0xfd0000 && address != 0x1fd0000) {
  79     dbgOutput("Did you forget to call AGBPrintInit?\n", 0);
  80     // get rid of the text otherwise we will continue to be called
  81     debuggerWriteHalfWord(0x9fe20fc, put);
  82     return;
  83   }
  84
  85   u8 *data = &rom[address];
  86
  87   while(get != put) {
  88     char c = data[get++];
  89     char s[2];
  90     s[0] = c;
  91     s[1] = 0;
  92
  93     if(systemVerbose & VERBOSE_AGBPRINT)
  94       dbgOutput(s, 0);
  95     if(c == '\n')
  96       break;
  97   }
  98   debuggerWriteHalfWord(0x9fe20fc, get);
  99 }