source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuPrintCfg.asm@ 289

; Project name  :   XTIDE Universal BIOS
; Description   :   Functions for printing drive configuration
;                   information on Boot Menu.
;
; Included by BootMenuPrint.asm, this routine is to be inserted into
; BootMenuPrint_HardDiskRefreshInformation.
;
; Section containing code
SECTION .text

;;; fall-into from BootMenuPrint_HardDiskRefreshInformation.

;--------------------------------------------------------------------
; Prints Hard Disk configuration for drive handled by our BIOS.
; Cursor is set to configuration header string position.
;
; BootMenuPrintCfg_ForOurDrive
;   Parameters:
;       DS:DI:      Pointer to DPT
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX
;--------------------------------------------------------------------
.BootMenuPrintCfg_ForOurDrive:
    eMOVZX  ax, BYTE [di+DPT.bIdevarsOffset]
    xchg    bx, ax                      ; CS:BX now points to IDEVARS
    ; Fall to .PushAndFormatCfgString

;--------------------------------------------------------------------
; PushAddressingMode
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (jumps to next push below)
;   Corrupts registers:
;       AX, CX
;--------------------------------------------------------------------
.PushAddressingMode:
    AccessDPT_GetUnshiftedAddressModeToALZF
    ;; 
    ;; This multiply both shifts the addressing mode bits down to low order bits, and 
    ;; at the same time multiplies by the size of the string displacement.  The result is in AH,
    ;; with AL clear, and so we exchange AL and AH after the multiply for the final result.
    ;; 
    mov     cl,(1<<(8-ADDRESSING_MODE_FIELD_POSITION)) * g_szAddressingModes_Displacement
    mul     cl
    xchg    al,ah
    add     ax,g_szAddressingModes
    push    ax
        
;--------------------------------------------------------------------
; PushBlockMode
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
.PushBlockMode:
    mov     ax, 1
    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED
    jz      SHORT .PushBlockSizeFromAX
    mov     al, [di+DPT_ATA.bSetBlock]
.PushBlockSizeFromAX:
    push    ax

;--------------------------------------------------------------------
; PushBusType
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (jumps to next push below)
;   Corrupts registers:
;       AX, DX
;--------------------------------------------------------------------
.PushBusType:
    mov     al,g_szBusTypeValues_Displacement
    mul     BYTE [cs:bx+IDEVARS.bDevice]
        
    shr     ax,1            ; divide by 2 since IDEVARS.bDevice is multiplied by 2
        
    add     ax,g_szBusTypeValues
    push    ax  
                
;--------------------------------------------------------------------
; PushIRQ
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX, DX
;--------------------------------------------------------------------
.PushIRQ:
    mov     al, BYTE [cs:bx+IDEVARS.bIRQ]
    cbw
    push    ax

;--------------------------------------------------------------------
; PushResetStatus
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
.PushResetStatus:
    mov     al, [di+DPT.bFlagsHigh]
    and     al, MASKH_DPT_RESET         ;  ah already zero from last push
    push    ax

;;; fall-out to BootMenuPrint_HardDiskRefreshInformation.