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Diffstat (limited to 'tools/ioemu/iodev/floppy.h')
| -rw-r--r-- | tools/ioemu/iodev/floppy.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/floppy.h b/tools/ioemu/iodev/floppy.h new file mode 100644 index 0000000000..d874539900 --- /dev/null +++ b/tools/ioemu/iodev/floppy.h @@ -0,0 +1,138 @@ +///////////////////////////////////////////////////////////////////////// +// $Id: floppy.h,v 1.16 2002/11/30 09:39:29 vruppert Exp $ +///////////////////////////////////////////////////////////////////////// +// +// Copyright (C) 2002 MandrakeSoft S.A. +// +// MandrakeSoft S.A. +// 43, rue d'Aboukir +// 75002 Paris - France +// http://www.linux-mandrake.com/ +// http://www.mandrakesoft.com/ +// +// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + + +#define FROM_FLOPPY 10 +#define TO_FLOPPY 11 + +#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; + } floppy_t; + +class bx_floppy_ctrl_c : public bx_floppy_stub_c { +public: + + bx_floppy_ctrl_c(void); + ~bx_floppy_ctrl_c(void); + virtual void init(void); + virtual void reset(unsigned type); + virtual unsigned set_media_status(unsigned drive, unsigned status); + virtual unsigned get_media_status(unsigned drive); + +private: + + struct { + Bit8u data_rate; + + Bit8u command[10]; /* largest command size ??? */ + Bit8u command_index; + Bit8u command_size; + bx_bool command_complete; + Bit8u pending_command; + + bx_bool multi_track; + bx_bool pending_irq; + Bit8u reset_sensei; + Bit8u format_count; + Bit8u format_fillbyte; + + Bit8u result[10]; + Bit8u result_index; + Bit8u result_size; + + Bit8u DOR; // Digital Ouput Register + Bit8u TDR; // Tape Drive Register + Bit8u cylinder[4]; // really only using 2 drives + Bit8u head[4]; // really only using 2 drives + Bit8u sector[4]; // really only using 2 drives + + /* 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_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+2]; // 2 extra for good measure + unsigned floppy_buffer_index; + int floppy_timer_index; + bx_bool media_present[2]; + 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 + } 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 void dma_write(Bit8u *data_byte); + BX_FD_SMF void dma_read(Bit8u *data_byte); + BX_FD_SMF void floppy_command(void); + 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 enter_idle_phase(void); + BX_FD_SMF void enter_result_phase(void); + static void timer_handler(void *); + +public: + BX_FD_SMF void timer(void); + BX_FD_SMF void increment_sector(void); + BX_FD_SMF bx_bool evaluate_media(unsigned type, char *path, floppy_t *floppy); + }; |