source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/IdeRegisters.inc @ 158

Last change on this file since 158 was 158, checked in by aitotat, 13 years ago

Changes to XTIDE Universal BIOS:

  • Optimized few bytes.
File size: 4.0 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Equates for IDE registers, flags and commands.
3%ifndef IDEREGISTERS_INC
4%define IDEREGISTERS_INC
5
6; IDE Register offsets from Command Block base port
7DATA_REGISTER                   EQU     0
8ERROR_REGISTER_in               EQU     1       ; Read only
9FEATURES_REGISTER_out           EQU     1       ; Write only, ATA1+
10;WRITE_PRECOMPENSATION_out      EQU     1       ; Write only, Obsolete on ATA1+
11SECTOR_COUNT_REGISTER           EQU     2
12SECTOR_NUMBER_REGISTER          EQU     3       ; LBA Low Register
13LOW_CYLINDER_REGISTER           EQU     4       ; LBA Middle Register
14HIGH_CYLINDER_REGISTER          EQU     5       ; LBA High Register
15LBA_LOW_REGISTER                EQU     3       ; LBA 7...0, LBA48 31...24
16LBA_MIDDLE_REGISTER             EQU     4       ; LBA 15...8, LBA48 39...32
17LBA_HIGH_REGISTER               EQU     5       ; LBA 23...16, LBA48 47...40
18DRIVE_AND_HEAD_SELECT_REGISTER  EQU     6       ; LBA28 27...24
19STATUS_REGISTER_in              EQU     7       ; Read only
20COMMAND_REGISTER_out            EQU     7       ; Write only
21;XTIDE_DATA_HIGH_REGISTER       EQU     8       ; Non-standard (actually first Control Block reg)
22
23; IDE Register offsets from Control Block base port
24; (usually Command Block base port + 200h)
25ALTERNATE_STATUS_REGISTER_in    EQU     6       ; Read only
26DEVICE_CONTROL_REGISTER_out     EQU     6       ; Write only
27;DRIVE_ADDRESS_REGISTER         EQU     7       ; Obsolete on ATA2+
28
29; Bit mask for XTIDE mod with reversed A0 and A3 address lines
30MASK_A3_AND_A0_ADDRESS_LINES    EQU     ((1<<3) | (1<<0))
31
32; Bit definitions for IDE Error Register
33FLG_ERROR_BBK           EQU     (1<<7)  ; Bad Block Detected (reserved on ATA2+, command dependent on ATA4+)
34FLG_ERROR_UNC           EQU     (1<<6)  ; Uncorrectable Data Error (command dependent on ATA4+)
35FLG_ERROR_MC            EQU     (1<<5)  ; Media Changed (command dependent on ATA4+)
36FLG_ERROR_IDNF          EQU     (1<<4)  ; ID Not Found (command dependent on ATA4+)
37FLG_ERROR_MCR           EQU     (1<<3)  ; Media Change Request (command dependent on ATA4+)
38FLG_ERROR_ABRT          EQU     (1<<2)  ; Command Aborted
39FLG_ERROR_TK0NF         EQU     (1<<1)  ; Track 0 Not Found (command dependent on ATA4+)
40FLG_ERROR_AMNF          EQU     (1<<0)  ; Address Mark Not Found (command dependent on ATA4+)
41
42; Bit definitions for IDE Drive and Head Select Register
43FLG_DRVNHEAD_LBA        EQU     (1<<6)  ; LBA Addressing enabled (instead of CHS)
44FLG_DRVNHEAD_DRV        EQU     (1<<4)  ; Drive Select (0=Master, 1=Slave)
45MASK_DRVNHEAD_HEAD      EQU     0Fh     ; Head select bits (bits 0...3)
46MASK_DRVNHEAD_SET       EQU     0A0h    ; Bits that must be set to 1 on ATA1 (reserved on ATA2+)
47
48; Bit definitions for IDE Status Register
49FLG_STATUS_BSY          EQU     (1<<7)  ; Busy (other flags undefined when set)
50FLG_STATUS_DRDY         EQU     (1<<6)  ; Device Ready
51FLG_STATUS_DF           EQU     (1<<5)  ; Device Fault (command dependent on ATA4+)
52FLG_STATUS_DSC          EQU     (1<<4)  ; Device Seek Complete (command dependent on ATA4+)
53FLG_STATUS_DRQ          EQU     (1<<3)  ; Data Request
54FLG_STATUS_CORR         EQU     (1<<2)  ; Corrected Data (obsolete on ATA4+)
55FLG_STATUS_IDX          EQU     (1<<1)  ; Index (vendor specific on ATA2+, obsolete on ATA4+)
56FLG_STATUS_ERR          EQU     (1<<0)  ; Error
57
58; Bit definitions for IDE Device Control Register
59; Bit 0 must be zero, unlisted bits are reserved.
60;FLG_DEVCONTROL_HOB     EQU     (1<<7)  ; High Order Byte (ATA6+)
61;FLG_DEVCONTROL_O8H     EQU     (1<<3)  ; Drive has more than 8 heads (pre-ATA only, 1 on ATA1, reserved on ATA2+)
62FLG_DEVCONTROL_SRST     EQU     (1<<2)  ; Software Reset
63FLG_DEVCONTROL_nIEN     EQU     (1<<1)  ; Negated Interrupt Enable (IRQ disabled when set)
64
65; Commands for IDE Controller
66COMMAND_READ_SECTORS                    EQU     20h
67COMMAND_READ_SECTORS_EXT                EQU     24h     ; LBA48
68COMMAND_WRITE_SECTORS                   EQU     30h
69COMMAND_WRITE_SECTORS_EXT               EQU     34h     ; LBA48
70COMMAND_VERIFY_SECTORS                  EQU     40h
71COMMAND_VERIFY_SECTORS_EXT              EQU     42h     ; LBA48
72COMMAND_SEEK                            EQU     70h
73COMMAND_INITIALIZE_DEVICE_PARAMETERS    EQU     91h
74COMMAND_SET_MULTIPLE_MODE               EQU     0C6h    ; Block mode
75COMMAND_READ_MULTIPLE                   EQU     0C4h    ; Block mode
76COMMAND_READ_MULTIPLE_EXT               EQU     29h     ; LBA48, Block mode
77COMMAND_WRITE_MULTIPLE                  EQU     0C5h    ; Block mode
78COMMAND_WRITE_MULTIPLE_EXT              EQU     39h     ; LBA48, Block mode
79COMMAND_IDENTIFY_DEVICE                 EQU     0ECh
80COMMAND_SET_FEATURES                    EQU     0EFh
81
82
83%endif ; IDEREGISTERS_INC
Note: See TracBrowser for help on using the repository browser.