source/src/vm/mb8877.h

   1 /*\r
   2         Skelton for retropc emulator\r
   3 \r
   4         Origin : XM7\r
   5         Author : Takeda.Toshiya\r
   6         Date   : 2006.12.06 -\r
   7 \r
   8         [ MB8877 / MB8876 ]\r
   9 */\r
  10 \r
  11 #ifndef _MB8877_H_ \r
  12 #define _MB8877_H_\r
  13 \r
  14 #include "vm.h"\r
  15 #include "../emu.h"\r
  16 #include "device.h"\r
  17 \r
  18 #define SIG_MB8877_DRIVEREG     0\r
  19 #define SIG_MB8877_SIDEREG      1\r
  20 #define SIG_MB8877_MOTOR        2\r
  21 \r
  22 class DISK;\r
  23 \r
  24 class MB8877 : public DEVICE\r
  25 {\r
  26 private:\r
  27         // config\r
  28         bool ignore_crc;\r
  29         \r
  30         // output signals\r
  31         outputs_t outputs_irq;\r
  32         outputs_t outputs_drq;\r
  33         \r
  34         // drive info\r
  35         struct {\r
  36                 int track;\r
  37                 int index;\r
  38                 bool access;\r
  39                 // timing\r
  40                 int cur_position;\r
  41                 int next_trans_position;\r
  42                 int next_sync_position;\r
  43                 uint32 prev_clock;\r
  44         } fdc[MAX_DRIVE];\r
  45         DISK* disk[MAX_DRIVE];\r
  46         \r
  47         // registor\r
  48         uint8 status, status_tmp;\r
  49         uint8 cmdreg, cmdreg_tmp;\r
  50         uint8 trkreg;\r
  51         uint8 secreg;\r
  52         uint8 datareg;\r
  53         uint8 drvreg;\r
  54         uint8 sidereg;\r
  55         uint8 cmdtype;\r
  56         \r
  57         // event\r
  58         int register_id[8];\r
  59         \r
  60         // status\r
  61         bool now_search;\r
  62         bool now_seek, after_seek;\r
  63         int no_command;\r
  64         int seektrk;\r
  65         bool seekvct;\r
  66         bool motor_on;\r
  67         bool drive_sel;\r
  68         \r
  69         // timing\r
  70         uint32 prev_drq_clock;\r
  71         \r
  72         int get_cur_position();\r
  73         double get_usec_to_start_trans();\r
  74         \r
  75         // image handler\r
  76         uint8 search_track();\r
  77         uint8 search_sector(int trk, int side, int sct, bool compare);\r
  78         uint8 search_addr();\r
  79         \r
  80         // command\r
  81         void process_cmd();\r
  82         void cmd_restore();\r
  83         void cmd_seek();\r
  84         void cmd_step();\r
  85         void cmd_stepin();\r
  86         void cmd_stepout();\r
  87         void cmd_readdata();\r
  88         void cmd_writedata();\r
  89         void cmd_readaddr();\r
  90         void cmd_readtrack();\r
  91         void cmd_writetrack();\r
  92         void cmd_forceint();\r
  93         \r
  94         // irq/dma\r
  95         void set_irq(bool val);\r
  96         void set_drq(bool val);\r
  97         \r
  98 public:\r
  99         MB8877(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)\r
 100         {\r
 101                 init_output_signals(&outputs_irq);\r
 102                 init_output_signals(&outputs_drq);\r
 103                 motor_on = false;\r
 104         }\r
 105         ~MB8877() {}\r
 106         \r
 107         // common functions\r
 108         void initialize();\r
 109         void release();\r
 110         void reset();\r
 111         void write_io8(uint32 addr, uint32 data);\r
 112         uint32 read_io8(uint32 addr);\r
 113         void write_dma_io8(uint32 addr, uint32 data);\r
 114         uint32 read_dma_io8(uint32 addr);\r
 115         void write_signal(int id, uint32 data, uint32 mask);\r
 116         uint32 read_signal(int ch);\r
 117         void event_callback(int event_id, int err);\r
 118         void update_config();\r
 119         void save_state(FILEIO* state_fio);\r
 120         bool load_state(FILEIO* state_fio);\r
 121         \r
 122         // unique function\r
 123         void set_context_irq(DEVICE* device, int id, uint32 mask)\r
 124         {\r
 125                 register_output_signal(&outputs_irq, device, id, mask);\r
 126         }\r
 127         void set_context_drq(DEVICE* device, int id, uint32 mask)\r
 128         {\r
 129                 register_output_signal(&outputs_drq, device, id, mask);\r
 130         }\r
 131         DISK* get_disk_handler(int drv)\r
 132         {\r
 133                 return disk[drv];\r
 134         }\r
 135         void open_disk(int drv, _TCHAR path[], int offset);\r
 136         void close_disk(int drv);\r
 137         bool disk_inserted(int drv);\r
 138         void set_drive_type(int drv, uint8 type);\r
 139         uint8 get_drive_type(int drv);\r
 140         void set_drive_rpm(int drv, int rpm);\r
 141         void set_drive_mfm(int drv, bool mfm);\r
 142         uint8 fdc_status();\r
 143         void write_protect_fd(int drive, bool flag) {\r
 144           if((drive >= MAX_DRIVE) || (drive < 0)) return;\r
 145           disk[drive]->write_protected = flag;\r
 146         }\r
 147         bool is_write_protect_fd(int drive) {\r
 148           if((drive >= MAX_DRIVE) || (drive < 0)) return true; // Protected\r
 149           return disk[drive]->write_protected;\r
 150         }\r
 151 };\r
 152 \r
 153 #endif\r