source/src/vm/qc10/mfont.cpp

   1 /*
   2         EPSON QC-10 Emulator 'eQC-10'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.03.24 -
   6
   7         [ multifont rom card ]
   8 */
   9
  10 #include "mfont.h"
  11 #include "../i8259.h"
  12 #include "../../fifo.h"
  13
  14 #define BIT_IBF 0x80
  15 #define BIT_ERR 2
  16 #define BIT_OBF 1
  17
  18 namespace QC10 {
  19
  20 void MFONT::initialize()
  21 {
  22         memset(mfont, 0xff, sizeof(mfont));
  23
  24         // load multifont rom image
  25         FILEIO* fio = new FILEIO();
  26         if(fio->Fopen(create_local_path(_T("MFONT.ROM")), FILEIO_READ_BINARY)) {
  27                 fio->Fread(mfont, sizeof(mfont), 1);
  28                 fio->Fclose();
  29         }
  30         delete fio;
  31
  32         cmd = new FIFO(4);
  33         res = new FIFO(38);
  34
  35         status = 0;
  36 }
  37
  38 void MFONT::release()
  39 {
  40         cmd->release();
  41         delete cmd;
  42         res->release();
  43         delete res;
  44 }
  45
  46 void MFONT::write_io8(uint32_t addr, uint32_t data)
  47 {
  48         switch(addr & 0xff) {
  49         case 0xfc:
  50                 cmd->write(data);
  51                 if(cmd->count() == 3) {
  52                         int mode = cmd->read();
  53                         int code = cmd->read();
  54                         code |= cmd->read() << 8;
  55
  56                         if(0x200 <= code && code < 0xc00) {
  57                                 int ofs = (code - 0x200) * 36;
  58                                 res->clear();
  59                                 res->write(0x40);
  60                                 for(int i = 0; i < 36; i++) {
  61                                         res->write(mfont[ofs + i]);
  62                                 }
  63                                 status = BIT_IBF | BIT_OBF;
  64                                 d_pic->write_signal(SIG_I8259_IR7 | SIG_I8259_CHIP1, 1, 1);
  65                         } else {
  66                                 // error
  67                                 status = BIT_ERR;
  68                         }
  69                 }
  70                 break;
  71         case 0xfd:
  72                 // set irq
  73                 d_pic->write_signal(SIG_I8259_IR7 | SIG_I8259_CHIP1, 1, 1);
  74                 break;
  75         }
  76 }
  77
  78 uint32_t MFONT::read_io8(uint32_t addr)
  79 {
  80         uint32_t val;
  81
  82         switch(addr & 0xff) {
  83         case 0xfc:
  84                 val = res->read();
  85                 if(res->empty()) {
  86                         status = 0;
  87                 }
  88                 return val;
  89         case 0xfd:
  90                 // reset irq
  91                 d_pic->write_signal(SIG_I8259_IR7 | SIG_I8259_CHIP1, 0, 1);
  92                 return status;
  93         }
  94         return 0xff;
  95 }
  96
  97 #define STATE_VERSION   1
  98
  99 bool MFONT::process_state(FILEIO* state_fio, bool loading)
 100 {
 101         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 102                 return false;
 103         }
 104         if(!state_fio->StateCheckInt32(this_device_id)) {
 105                 return false;
 106         }
 107         state_fio->StateUint8(status);
 108         if(!cmd->process_state((void *)state_fio, loading)) {
 109                 return false;
 110         }
 111         if(!res->process_state((void *)state_fio, loading)) {
 112                 return false;
 113         }
 114         return true;
 115 }
 116
 117 }