source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc @ 236

Last change on this file since 236 was 236, checked in by aitotat@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • Restored lost alignment byte to DPT struct.
File size: 3.2 KB
RevLine 
[99]1; Project name  :   XTIDE Universal BIOS
[3]2; Description   :   Defines for DPT structs containing custom
3;                   Disk Parameter Table used by this BIOS.
4%ifndef CUSTOMDPT_INC
5%define CUSTOMDPT_INC
6
[150]7; Base DPT for all device types
[173]8struc DPT   ; 10 bytes
[3]9    ; General Disk Parameter Table related
[158]10    .wFlags:
11    .bFlagsLow                  resb    1
12    .bFlagsHigh                 resb    1
[150]13    .bIdevarsOffset             resb    1   ; Offset to IDEVARS for this drive
[236]14                                resb    1   ; Alignment
[3]15
[150]16    ; IDE Drive related
[227]17    ; .twLbaSectors is used for LBA addressing only.
18    ; .wPchsCylinders and .bPchsSectors are used for CHS addressing only.
19    .bLbaHeads:                             ; Number of LBA assisted heads (1...255)
20    .twLbaSectors               resb    2   ; 48-bit sector count for LBA addressing
21    .wPchsCylinders             resb    2   ; Number of P-CHS Cylinders (1...16383)
22    .wPchsHeadsAndSectors:
23    .bPchsHeads                 resb    1   ; Number of P-CHS heads (1...16)
24    .bPchsSectors               resb    1   ; Number of P-CHS Sectors per Track (1...63)
[150]25endstruc
[3]26
[150]27; DPT for ATA devices
[173]28struc DPT_ATA   ; 10 + 2 bytes = 12 bytes
[150]29    .dpt                        resb    DPT_size
30
[235]31    ; Block size is specified in sectors (1, 2, 4, 8, 16, 32, 64 or 128)
[3]32    .wSetAndMaxBlock:
[150]33    .bSetBlock                  resb    1   ; Current block size (at least 1)
34    .bMaxBlock                  resb    1   ; Maximum block size, 0 = block mode not supported
[3]35endstruc
36
[226]37%ifdef MODULE_SERIAL
38; DPT for Serial devices
39struc DPT_SERIAL
40    .dpt                        resb    DPT_size
41
[233]42    .wSerialPortAndBaud:
43    .bSerialPort                resb    1   ; Serial connection I/O port address, divided by 4
44    .bSerialBaud                resb    1   ; Serial connection baud rate divisor
[226]45endstruc
46%endif
47
[150]48LARGEST_DPT_SIZE                EQU     DPT_ATA_size
[3]49
50
[158]51; Bit definitions for DPT.bFlagsLow
52MASKL_DPT_CHS_SHIFT_COUNT       EQU (7<<0)  ; Bits 0...3, P-CHS to L-CHS bit shift count (0...4)
53FLGL_DPT_SLAVE                  EQU FLG_DRVNHEAD_DRV    ; (1<<4), Drive is slave drive
54MASKL_DPT_ADDRESSING_MODE       EQU (3<<5)  ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA)
55FLGL_DPT_ENABLE_IRQ             EQU (1<<7)
[3]56
[158]57; Bit definitions for DPT.bFlagsHigh
58FLGH_DPT_REVERSED_A0_AND_A3     EQU (1<<0)  ; XTIDE mod, Address lines 0 and 3 reversed
[165]59FLGH_DPT_BLOCK_MODE_SUPPORTED   EQU (1<<1)  ; Use block transfer commands (must be bit 1!)
[175]60%ifdef MODULE_SERIAL
[165]61FLGH_DPT_SERIAL_DEVICE          EQU (1<<2)  ; Serial Port Device
[175]62%endif
[158]63FLGH_DPT_INTERRUPT_IN_SERVICE   EQU (1<<3)  ; Set when waiting for IRQ
64FLGH_DPT_RESET_nDRDY            EQU (1<<4)  ; Drive ready to accept commands
65FLGH_DPT_RESET_nINITPRMS        EQU (1<<5)  ; Initialize Device Parameters successfull
66FLGH_DPT_RESET_nRECALIBRATE     EQU (1<<6)  ; Recalibrate successfull
67FLGH_DPT_RESET_nSETBLOCK        EQU (1<<7)  ; Initialize Block Mode successfull
68MASKH_DPT_RESET                 EQU 0F0h
69
[150]70; Addressing modes for DPT.wFlags
71ADDRESSING_MODE_FIELD_POSITION  EQU     5
72ADDRESSING_MODE_LCHS            EQU     0   ; L-CHS Addressing Mode (NORMAL in many other BIOSes)
73ADDRESSING_MODE_PCHS            EQU     1   ; P-CHS Addressing Mode (LARGE in many other BIOSes)
74ADDRESSING_MODE_LBA28           EQU     2   ; 28-bit LBA Addressing Mode
75ADDRESSING_MODE_LBA48           EQU     3   ; 48-bit LBA Addressing Mode
[3]76
[173]77; Number of Sectors per Track is fixed to 63 for LBA assist calculation.
78; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads)
79MAX_LCHS_CYLINDERS              EQU     1024
80LBA_ASSIST_SPT                  EQU     63
[3]81
[173]82
[3]83%endif ; CUSTOMDPT_INC
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