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99 lines
4.3 KiB
C
99 lines
4.3 KiB
C
/*
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Hatari - fdc.h
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This file is distributed under the GNU General Public License, version 2
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or at your option any later version. Read the file gpl.txt for details.
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*/
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#ifndef HATARI_FDC_H
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#define HATARI_FDC_H
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/* Values for the Size byte in the Address Field of a sector */
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#define FDC_SECTOR_SIZE_MASK 0x03 /* Only bits 0-1 of the Sector size in the ID field are used by the WD1772 */
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#define FDC_SECTOR_SIZE_128 0 /* Sector size used in the ID fields */
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#define FDC_SECTOR_SIZE_256 1
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#define FDC_SECTOR_SIZE_512 2
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#define FDC_SECTOR_SIZE_1024 3
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/* These are some standard GAP values to format a track with 9 or 10 sectors */
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/* When handling ST/MSA disk images, those values are required to get accurate */
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/* timings when emulating disk's spin and index's position. */
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/* Those values are also use to build standard sector in STX disk images when */
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/* track contains only the sector data and no sector info. */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP1 60 /* Track Pre GAP : 0x4e */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP2 12 /* Sector ID Pre GAP : 0x00 */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP3a 22 /* Sector ID Post GAP : 0x4e */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP3b 12 /* Sector DATA Pre GAP : 0x00 */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP4 40 /* Sector DATA Pre GAP : 0x4e */
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#define FDC_TRACK_LAYOUT_STANDARD_GAP5 0 /* Track Post GAP : 0x4e (to fill the rest of the track, value is variable) */
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/* GAP5 is 664 bytes for 9 sectors or 50 bytes for 10 sectors */
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/* Size of a raw standard 512 byte sector in a track, including ID field and all GAPs : 614 bytes */
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/* (this must be the same as the data returned in FDC_UpdateReadTrackCmd() ) */
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#define FDC_TRACK_LAYOUT_STANDARD_RAW_SECTOR_512 ( FDC_TRACK_LAYOUT_STANDARD_GAP2 \
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+ 3 + 1 + 6 + FDC_TRACK_LAYOUT_STANDARD_GAP3a + FDC_TRACK_LAYOUT_STANDARD_GAP3b \
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+ 3 + 1 + 512 + 2 + FDC_TRACK_LAYOUT_STANDARD_GAP4 )
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#define FDC_IRQ_SOURCE_COMPLETE (1<<0) /* IRQ set after completing a command */
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#define FDC_IRQ_SOURCE_INDEX (1<<1) /* IRQ set when COND_IP is set and index is reached */
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#define FDC_IRQ_SOURCE_FORCED (1<<2) /* IRQ was forced by a previous Dx command with COND_IMMEDIATE */
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#define FDC_IRQ_SOURCE_HDC (1<<3) /* IRQ set by HDC */
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#define FDC_IRQ_SOURCE_OTHER (1<<4) /* IRQ set by other parts (IPF) */
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extern void FDC_MemorySnapShot_Capture ( bool bSave );
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extern void FDC_Init ( void );
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extern void FDC_Reset ( bool bCold );
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extern void FDC_SetDMAStatus ( bool bError );
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extern void FDC_SetIRQ ( Uint8 IRQ_Source );
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extern void FDC_ClearIRQ ( void );
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extern void FDC_ClearHdcIRQ(void);
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extern void FDC_InterruptHandler_Update ( void );
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extern void FDC_Drive_Set_BusyLed ( Uint8 SR );
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extern int FDC_Get_Statusbar_Text ( char *text, size_t maxlen );
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extern void FDC_Drive_Set_Enable ( int Drive , bool value );
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extern void FDC_Drive_Set_NumberOfHeads ( int Drive , int NbrHeads );
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extern void FDC_InsertFloppy ( int Drive );
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extern void FDC_EjectFloppy ( int Drive );
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extern void FDC_SetDriveSide ( Uint8 io_porta_old , Uint8 io_porta_new );
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extern int FDC_GetBytesPerTrack ( int Drive );
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extern int FDC_IndexPulse_GetCurrentPos_FdcCycles ( Uint32 *pFdcCyclesPerRev );
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extern int FDC_IndexPulse_GetCurrentPos_NbBytes ( void );
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extern int FDC_IndexPulse_GetState ( void );
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extern int FDC_NextIndexPulse_FdcCycles ( void );
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extern Uint8 FDC_GetCmdType ( Uint8 CR );
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extern void FDC_DiskController_WriteWord ( void );
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extern void FDC_DiskControllerStatus_ReadWord ( void );
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extern void FDC_DmaModeControl_WriteWord ( void );
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extern void FDC_DmaStatus_ReadWord ( void );
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extern int FDC_DMA_GetModeControl_R_WR ( void );
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extern void FDC_DMA_FIFO_Push ( Uint8 Byte );
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extern Uint8 FDC_DMA_FIFO_Pull ( void );
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extern void FDC_Buffer_Reset ( void );
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extern void FDC_Buffer_Add_Timing ( Uint8 Byte , Uint16 Timing );
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extern void FDC_Buffer_Add ( Uint8 Byte );
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extern Uint16 FDC_Buffer_Read_Timing ( void );
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extern Uint8 FDC_Buffer_Read_Byte ( void );
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extern Uint8 FDC_Buffer_Read_Byte_pos ( int pos );
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extern int FDC_Buffer_Get_Size ( void );
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extern void FDC_DmaAddress_ReadByte ( void );
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extern void FDC_DmaAddress_WriteByte ( void );
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extern Uint32 FDC_GetDMAAddress ( void );
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extern void FDC_WriteDMAAddress ( Uint32 Address );
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extern void FDC_FloppyMode_ReadByte ( void );
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extern void FDC_FloppyMode_WriteByte ( void );
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#endif /* ifndef HATARI_FDC_H */
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