client/trunk/anago/bandai_lz93d50_x24c01.ag

   1 /*
   2 BANDAI FCG-3 + X24C01 style cartridge
   3
   4 SDガンダム外伝 ナイトガンダム物語
   5         1990-08-11 B50EEP, LZ93D50+X24C01
   6 ドラゴンボールZ 強襲！サイヤ人
   7         1990-10-27 DRAGON BALLZ, LZ93D50+X24C01
   8 まじかる☆タルるートくん ファンタスティックワールド
   9         1991-03-21 DRAGON BALLZ-B, LZ93D50+X24C01
  10 まじかる☆タルるートくん2
  11         1992-06-19 DRAGON BALLZ-B, LZ93D50+X24C01 ← 24C02 ではない
  12 */
  13 board <- {
  14         mappernum = 16,
  15         cpu_rom = {
  16                 size_base = 2 * mega, size_max = 2 * mega,
  17                 banksize = 0x4000
  18         },
  19         cpu_ram = {
  20                 size_base = 0x0080, size_max = 0x0080,
  21                 banksize = 0x0080
  22         },
  23         ppu_rom = {
  24                 size_base = 1 * mega, size_max = 2 * mega,
  25                 banksize = 0x0400
  26         },
  27         ppu_ramfind = false,
  28         vram_mirrorfind = false
  29 };
  30
  31 const register_offset = 0x8000;
  32 dofile("lz93d50.ai");
  33
  34 /*
  35 =====================
  36 X24C01 frame sequence
  37 =====================
  38 <START>[EEPROM address+RW]<A-ACK>[data]<D-ACK><STOP>
  39
  40 <> is 1bit, [] is 8bit, A-ACK is address acknowledge,
  41 D-ACK is data acknowledge, R is 1, W is 0
  42
  43 8bit data send MSB to LSB (bit7 to bit0)
  44 Dragon Ball Z1's program send address LSB to MSB (bug).
  45
  46 slave address does not exist.
  47
  48 --current address read--
  49 <START>[EEPROM address,R]<A-ACK>[EEPROM data]<D-ACK><STOP>
  50
  51 --sequenctial read--
  52 <START>[EEPROM address,R]<A-ACK>|[EEPROM data]<D-ACK>|<STOP>
  53                                 |<- loop any times ->|
  54
  55 --page write---
  56 |<START>[EEPROM address,W]<A-ACK>|[EEPROM data]<D-ACK>|<STOP>
  57 |<-     loop A-ACK is H        ->|<- loop 1to4times ->|
  58 */
  59
  60 function cpu_ram_access(d, pagesize, banksize)
  61 {
  62         local I2C_WRITE = I2C_SEND_L;
  63         local I2C_READ = I2C_SEND_H;
  64
  65         if(mode_is_read(d) == true){
  66                 //sequential read
  67                 i2c_address_set(d, 0, I2C_READ);
  68                 for(local i = 0; i < pagesize * banksize; i++){
  69                         for(local bit = 0; bit < 8; bit++){
  70                                 cpu_write(d, 0x800d, I2C_DIR_WRITE | I2C_CLOCK_L | I2C_SEND_H);
  71                                 cpu_write(d, 0x800d, I2C_DIR_READ | I2C_CLOCK_H | I2C_SEND_H);
  72                                 cpu_read_bit_msb(d, 0x6000, 4);
  73                         }
  74                         //send ack
  75                         send_bit(d, I2C_SEND_L);
  76                 }
  77                 i2c_stop(d);
  78         }else{
  79                 //page write (4byte)
  80                 for(local i = 0; i < pagesize * banksize; i+=4){
  81                         i2c_address_set(d, i, I2C_WRITE);
  82                         for(local j = 0; j < 4; j++){
  83                                 for(local bit = 0; bit < 8; bit++){
  84                                         local n = I2C_SEND_L;
  85                                         if(cpu_fetch_bit_msb(d) != 0){
  86                                                 n = I2C_SEND_H;
  87                                         }
  88                                         send_bit(d, n);
  89                                 }
  90                                 i2c_ack_wait(d);
  91                         }
  92                         i2c_stop(d);
  93                 }
  94         }
  95 }