///////////////////////////////////////////////////////////////////////// // $Id$ ///////////////////////////////////////////////////////////////////////// // // Copyright (C) 2002-2023 The Bochs Project // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA // #ifndef BX_IODEV_FLOPPY_H #define BX_IODEV_FLOPPY_H /* for main status register */ #define FD_MS_RQM 0x80 #define FD_MS_DIO 0x40 #define FD_MS_NDMA 0x20 #define FD_MS_BUSY 0x10 #define FD_MS_ACTD 0x08 #define FD_MS_ACTC 0x04 #define FD_MS_ACTB 0x02 #define FD_MS_ACTA 0x01 enum { FROM_FLOPPY = 10, TO_FLOPPY = 11 }; #define FLOPPY_DMA_CHAN 2 #define FDRIVE_NONE 0x00 #define FDRIVE_525DD 0x01 #define FDRIVE_525HD 0x02 #define FDRIVE_350DD 0x04 #define FDRIVE_350HD 0x08 #define FDRIVE_350ED 0x10 // Command Bits #define FD_CMD_MT 0x80 #define FD_CMD_MFM 0x40 #define FD_CMD_SK 0x20 #define FD_CMD_LOCK 0x80 #define FD_CMD_DIR 0x40 // Commands enum { FD_CMD_NOP = 0x00, // (Contrived for this implementation) FD_CMD_MODE = 0x01, // DP8473 PC87306 FD_CMD_READ_TRACK = 0x02, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_SPECIFY = 0x03, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_SENSE_DRV_STATUS = 0x04, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_WRITE_NORMAL_DATA = 0x05, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_READ_NORMAL_DATA = 0x06, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_RECALIBRATE = 0x07, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_SENSE_INT_STATUS = 0x08, // 82077AA 82078 37c78 DP8473 PC87306 //FD_CMD_WRITE_DELETED_DATA = 0x09, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_READ_ID = 0x0A, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_MOTOR_ON_OFF = 0x0B, // FD_CMD_READ_DELETED_DATA = 0x0C, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_FORMAT_TRACK = 0x0D, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_DUMPREG = 0x0E, // 82077AA 82078 37c78 PC87306 FD_CMD_SEEK = 0x0F, // 82077AA 82078 37c78 DP8473 PC87306 FD_CMD_VERSION = 0x10, // 82077AA 82078 37c78 PC87306 FD_CMD_SCAN_EQUAL = 0x11, // 82077AA 82078 DP8473 PC87306 FD_CMD_PERPENDICULARE_MODE = 0x12, // 82077AA 82078 37c78 PC87306 FD_CMD_CONFIGURE = 0x13, // 82077AA 82078 37c78 PC87306 FD_CMD_LOCK_UNLOCK = 0x14, // 82077AA 82078 37c78 PC87306 FD_CMD_VERIFY = 0x16, // 82077AA 82078 37c78 PC87306 FD_CMD_POWER_DOWN_MODE = 0x17, // 82078 FD_CMD_PART_ID = 0x18, // 82078 PC87306 FD_CMD_SCAN_LOW_EQUAL = 0x19, // 82077AA 82078 DP8473 PC87306 FD_CMD_SCAN_HIGH_EQUAL = 0x1D, // 82077AA 82078 DP8473 PC87306 FD_CMD_SET_TRACK = 0x21, // DP8473 PC87306 FD_CMD_SAVE = 0x2E, // 82078 FD_CMD_OPTION = 0x33, // 82078 FD_CMD_EXIT_STANDBY_MODE = 0x34, // FD_CMD_ENTER_STANDBY_MODE = 0x35, // FD_CMD_HARD_RESET = 0x36, // FD_CMD_RESTORE = 0x4E, // 82078 FD_CMD_DRIVE_SPECIFICATION = 0x8E, // 82078 FD_CMD_RELATIVE_SEEK = 0x8F, // 82077AA 82078 37c78 PC87306 FD_CMD_FORMAT_AND_WRITE = 0xAD, // 82078 FD_RESET = 0xFE, // (Contrived for this implementation) }; // 82078 power down flags #define PD_FLAGS_EREG_EN 0x20 // allow access to the TDR? (82078 only) #define PD_FLAGS_44PD_EN 0x10 // use pin 44? #define PD_FLAGS_FDI_TRI 0x04 // Floppy Drive Interface Tristate #define PD_FLAGS_MIN_DLY 0x02 // Min power up control (10ms or 1/2ms) #define PD_FLAGS_AUTO_PD 0x01 // Auto Power Down enabled // DP8473 mode flags #define FLAGS_ETR 0x01 // Extended Track Range // max count of bytes in the command/result phazes // (RESTORE has 17 bytes in command, SAVE has 16 bytes in restore) #define MAX_PHASE_SIZE 20 // Win98 and older seem to erroroneously set bit 1 of the DS0/DS1 bits (drive bits) // specifying drive 2 for drive 0, and drive 3 for drive 1. // So to make them work, we have to mask off that bit. However, this will mean // that we can only have 2 drives (which is the case at the moment) #define FDC_DRV_MASK 0x01 // set to 0x03 if you have 4 drives. #if BX_USE_FD_SMF # define BX_FD_SMF static # define BX_FD_THIS theFloppyController-> #else # define BX_FD_SMF # define BX_FD_THIS this-> #endif typedef struct { int fd; /* file descriptor of floppy image file */ unsigned sectors_per_track; /* number of sectors/track */ unsigned sectors; /* number of formatted sectors on diskette */ unsigned tracks; /* number of tracks */ unsigned heads; /* number of heads */ unsigned type; unsigned write_protected; unsigned status_changed; bool vvfat_floppy; device_image_t *vvfat; } floppy_t; class bx_floppy_ctrl_c : public bx_devmodel_c { public: bx_floppy_ctrl_c(); virtual ~bx_floppy_ctrl_c(); virtual void init(void); virtual void reset(unsigned type); virtual void register_state(void); virtual void after_restore_state(void); #if BX_DEBUGGER virtual void debug_dump(int argc, char **argv); #endif private: struct { Bit8u command[MAX_PHASE_SIZE]; Bit8u command_index; Bit8u command_size; bool command_complete; Bit8u pending_command; bool multi_track; bool pending_irq; Bit8u reset_sensei; Bit8u sector_count; Bit8u format_fillbyte; Bit16u format_cylinder; Bit8u format_sector_bp[36]; bool format_write_flag; Bit8u result[MAX_PHASE_SIZE]; Bit8u result_index; Bit8u result_size; Bit8u last_result; Bit8u DSR; // Datarate Select Register (DSR) Bit8u DOR; // Digital Ouput Register Bit8u TDR; // Tape Drive Register Bit16u cylinder[4]; // really only using 2 drives Bit8u head[4]; // really only using 2 drives Bit8u sector[4]; // really only using 2 drives Bit8u eot[4]; // really only using 2 drives Bit8u stp; // used with the scan commands bool TC; // Terminal Count status from DMA controller /* MAIN STATUS REGISTER * b7: MRQ: main request 1=data register ready 0=data register not ready * b6: DIO: data input/output: * 1=controller->CPU (ready for data read) * 0=CPU->controller (ready for data write) * b5: NDMA: non-DMA mode: 1=controller not in DMA modes * 0=controller in DMA mode * b4: BUSY: instruction(device busy) 1=active 0=not active * b3-0: ACTD, ACTC, ACTB, ACTA: * drive D,C,B,A in positioning mode 1=active 0=not active */ Bit8u main_status_reg; Bit8u status_reg_a; Bit8u status_reg_b; Bit8u status_reg0; Bit8u status_reg1; Bit8u status_reg2; Bit8u status_reg3; // drive field allows up to 4 drives, even though probably only 2 will // ever be used. floppy_t media[4]; unsigned num_supported_floppies; Bit8u floppy_buffer[512]; Bit8u scan_buffer[512]; unsigned floppy_buffer_index; int floppy_timer_index; bool media_present[4]; Bit8u device_type[4]; Bit8u DIR[4]; // Digital Input Register: // b7: 0=diskette is present and has not been changed // 1=diskette missing or changed bool standby; // in standby mode? bool lock; // FDC lock status Bit8u SRT; // step rate time Bit8u HUT; // head unload time Bit8u HLT; // head load time Bit8u config; // configure byte #1 Bit8u pretrk; // precompensation track Bit8u perp_mode; // perpendicular mode Bit8u mode0; // FDC_TYPE_DP8473 mode0 register Bit8u mode1; // FDC_TYPE_DP8473 mode1 register Bit8u mode2; // FDC_TYPE_DP8473 mode2 register Bit8u option; // FDC_TYPE_82078 option register Bit8u power_down; // power down flags (82078) int statusbar_id[2]; // IDs of the status LEDs int rt_conf_id; // ID of the runtime config handler } s; // state information static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len); static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len); #if !BX_USE_FD_SMF Bit32u read(Bit32u address, unsigned io_len); void write(Bit32u address, Bit32u value, unsigned io_len); #endif BX_FD_SMF bool set_media_status(unsigned drive, bool status); BX_FD_SMF Bit16u dma_write(Bit8u *buffer, Bit16u maxlen); BX_FD_SMF Bit16u dma_read(Bit8u *buffer, Bit16u maxlen); BX_FD_SMF void floppy_command(void); BX_FD_SMF void do_floppy_xfer(Bit8u *buffer, Bit8u drive, Bit8u fromto); BX_FD_SMF void floppy_xfer(Bit8u drive, Bit32u offset, Bit8u *buffer, Bit32u bytes, Bit8u direction); BX_FD_SMF void raise_interrupt(void); BX_FD_SMF void lower_interrupt(void); BX_FD_SMF void enter_idle_phase(void); BX_FD_SMF void enter_result_phase(void); BX_FD_SMF Bit32u calculate_step_delay(Bit8u drive, Bit8u new_cylinder); BX_FD_SMF void reset_changeline(void); BX_FD_SMF bool get_tc(void); static void timer_handler(void *); BX_FD_SMF void timer(void); BX_FD_SMF bool end_of_track(void); BX_FD_SMF void increment_sector(void); BX_FD_SMF bool evaluate_media(Bit8u devtype, Bit8u type, const char *path, floppy_t *media); BX_FD_SMF void close_media(floppy_t *media); BX_FD_SMF bool command_supported(Bit8u command); // runtime options static Bit64s floppy_param_handler(bx_param_c *param, bool set, Bit64s val); static const char *floppy_param_string_handler(bx_param_string_c *param, bool set, const char *oldval, const char *val, int maxlen); static void runtime_config_handler(void *); void runtime_config(void); }; #endif