; File name : CustomDPT.inc ; Project name : IDE BIOS ; Created date : 23.3.2010 ; Last update : 10.4.2010 ; Author : Tomi Tilli ; Description : Defines for DPT structs containing custom ; Disk Parameter Table used by this BIOS. %ifndef CUSTOMDPT_INC %define CUSTOMDPT_INC ; Base Disk Parameter Table for all hard disk drives. ; DPT might have extensions for specific functions. struc DPT ; General Disk Parameter Table related .bSize resb 1 ; Size of DPT (with extensions) in bytes .bDrvNum resb 1 ; Drive number .bFlags resb 1 ; DPT and Drive related flags .bReset resb 1 ; Drive reset status (for debugging) .bIdeOff resb 1 ; Offset to IDEVARS for this drive ; Lookup values for L-CHS to P-CHS and L-CHS to LBA28 conversions .bShLtoP resb 1 ; Bit shift count for L-CHS to P-CHS conversion .wLHeads resb 2 ; Number of L-CHS Heads (1...256) ; IDE related .wPCyls resb 2 ; Number of P-CHS (IDE) Cylinders (1...16383) .bPHeads resb 1 ; Number of P-CHS (IDE) Heads (1...16) .bPSect resb 1 ; Number of P-CHS (IDE) Sectors per Track (1...63) .bDrvSel resb 1 ; Drive Selection byte for Device/Head Register .bDrvCtrl resb 1 ; Drive Control byte for Device Control Register ; Related to Block Mode transfers. ; Block size is specified in sectors (1, 2, 4, 8, 16, 32, 64 or 128). .wSetAndMaxBlock: .bSetBlock resb 1 ; Currect block size (at least 1) .bMaxBlock resb 1 ; Maximum block size, 0 = block mode not supported endstruc ; Bit definitions for DPT.bFlags MASK_DPT_ADDR EQU 110b ; Bits 1..2, Addressing Mode FLG_DPT_EBIOS EQU (1<<0) ; EBIOS functions supported for this drive FLG_DPT_FIRSTPART EQU (1<<3) ; First BIOS Partition of the drive (drive reset allowed) FLG_DPT_PARTITION EQU (1<<4) ; BIOS Partition FLG_DPT_USERCHS EQU (1<<5) ; User has specified P-CHS parameters ; Values for different addressing modes (MASK_DPT_ADDR for DPT.bFlags) ADDR_DPT_LCHS EQU 0 ; L-CHS Addressing Mode (NORMAL in many other BIOSes) ADDR_DPT_PCHS EQU 1 ; P-CHS Addressing Mode (LARGE in many other BIOSes) ADDR_DPT_LBA28 EQU 2 ; 28-bit LBA Addressing Mode ADDR_DPT_LBA48 EQU 3 ; 48-bit LBA Addressing Mode ; Bit definitions for DPT.bReset (inverted) FLG_RESET_nDRDY EQU (1<<0) ; Drive ready to accept commands FLG_RESET_nINITPRMS EQU (1<<1) ; Initialize Device Parameters successfull FLG_RESET_nRECALIBRATE EQU (1<<2) ; Recalibrate successfull FLG_RESET_nSETBLOCK EQU (1<<3) ; Initialize Block Mode successfull MASK_RESET_ALL EQU (FLG_RESET_nDRDY | FLG_RESET_nINITPRMS | FLG_RESET_nRECALIBRATE | FLG_RESET_nSETBLOCK) ; Extended DPT for XTIDE Universal BIOS partitioned drive. ; This struct cannot exist with EDPT (EBIOS support). struc PART_DPT .dpt resb DPT_size .dwStartLBA: .twStartLBA resb 6 ; Starting 28- or 48-bit LBA for BIOS partition endstruc ; Extended DPT for EBIOS support. ; This struct cannot exist with PDPT (XTIDE Universal BIOS partitioned drive). struc EBDPT .dpt resb DPT_size .dwCapacity: .twCapacity resb 6 ; Total drive capacity in sectors endstruc %endif ; CUSTOMDPT_INC