atapi_info.inc

TestOS - 带简单GUI的DOS扩展OS// 源代码// ASM// 英文

;=========================================================;
; ATAPI Information Block                        11/12/01 ;
;---------------------------------------------------------;
; DOS EXTREME OS V0.01                                    ;
; by Craig Bamford.                                       ;
;                                                         ;
;  * M = mandatory                                        ; 
;  * O = optional                                         ; 
;                                                         ;         
;=========================================================;

R_Date         = 0    ; date reg
W_Date         = 0    ; date reg
R_Error        = 1    ; error reg
W_Feature      = 1    ; feature reg
R_SectCount    = 2    ; sector count reg
W_SectCount    = 2    ; sector count reg
R_Sector       = 3    ; sector number or lba bits 0-7
W_Sector       = 3    ; sector number or lba bits 0-7
R_Cylinder0    = 4    ; cylinder bits 0-7 or lba bits 8-15
W_Cylinder0    = 4    ; cylinder bits 0-7 or lba bits 8-15
R_Cylinder1    = 5    ; cylinder bits 8-15 or lba bits 16-23
W_Cylinder1    = 5    ; cylinder bits 8-15 or lba bits 16-23
R_DriveHead    = 6    ; drive & head bits or lba bits 24-27
W_Drivehead    = 6    ; drive & head bits or lba bits 24-27
R_Status       = 7    ; status reg
W_Command      = 7    ; command reg

R_Status_BSY   = 0x80 ; bit 7
R_Status_DRDY  = 0x40 ; bit 6
R_Status_DWF   = 0x20 ; bit 5
R_Status_DSC   = 0x10 ; bit 4
R_Status_DRQ   = 0x08 ; bit 3
R_Status_CORR  = 0x04 ; bit 2
R_Status_IDX   = 0x02 ; bit 1
R_Status_ERR   = 0x01 ; bit 0

Atapi_Packet_Command  = 0xA0 ; *M
Atapi_Identify_Drive  = 0xA1 ; *M
Atapi_Soft_Reset      = 0x08 ; *M
Atapi_Service         = 0xA2 ; *O

Atapi_StartStop_Group = 0x1B ; *O





;================================== ATAPI MODE INFORMATION END =================================