source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Menus/BootMenu/BootMenuPrintCfg.asm@ 590

; 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.
;

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;

; 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, [di+DPT.bIdevarsOffset]
    xchg    bx, ax                      ; CS:BX now points to IDEVARS
    ; Fall to .PushAddressingMode

;--------------------------------------------------------------------
; .PushAddressingMode
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX, CX, DX
;--------------------------------------------------------------------
.PushAddressingMode:
    mov     al, [di+DPT.bFlagsLow]
    and     ax, BYTE MASKL_DPT_TRANSLATEMODE
    ;;
    ;; 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     cx, g_szAddressingModes_Displacement << (8-TRANSLATEMODE_FIELD_POSITION)
    mul     cx
    xchg    al, ah      ; AL = always zero after above multiplication
    add     ax, g_szAddressingModes
    push    ax
    ; Fall to .PushBlockMode

;--------------------------------------------------------------------
; .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_USE_BLOCK_MODE_COMMANDS
    jz      SHORT .PushBlockSizeFromAX
    mov     al, [di+DPT_ATA.bBlockSize]
.PushBlockSizeFromAX:
    push    ax
    ; Fall to .PushDeviceType

;--------------------------------------------------------------------
; .PushDeviceType
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
.PushDeviceType:
%ifndef MODULE_SERIAL
    mov     al, g_szDeviceTypeValues_Displacement
    mul     BYTE [di+DPT_ATA.bDevice]
%else
    mov     ah, [cs:bx+IDEVARS.bDevice]
    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE    ; Clears CF
    eCMOVZ  ah, [di+DPT_ATA.bDevice]    ; DPT_ATA contains up to date device information for IDE drives
%ifdef USE_UNDOC_INTEL
    salc    ; Clear AL using CF (from TEST above)
    eAAD    g_szDeviceTypeValues_Displacement
%else
    mov     al, g_szDeviceTypeValues_Displacement
    mul     ah
%endif ; USE_UNDOC_INTEL
%endif ; MODULE_SERIAL

%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
    %if (COUNT_OF_ALL_IDE_DEVICES * 2 * g_szDeviceTypeValues_Displacement) > 255
        %error "The USE_UNDOC_INTEL block in .PushDeviceType needs to be removed (would cause an overflow)!"
    %endif
%endif

    shr     ax, 1   ; Divide by 2 since IDEVARS.bDevice is multiplied by 2
    add     ax, g_szDeviceTypeValues
    push    ax
    ; Fall to .PushIRQ

;--------------------------------------------------------------------
; .PushIRQ
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
.PushIRQ:
    mov     al, [cs:bx+IDEVARS.bIRQ]
    cbw
    push    ax
    ; Fall to .PushResetStatus

;--------------------------------------------------------------------
; .PushResetStatus
;   Parameters:
;       DS:DI:  Ptr to DPT
;       CS:BX:  Ptr to IDEVARS
;   Returns:
;       Nothing (falls to next push below)
;   Corrupts registers:
;       AX, BX, DX, ES
;--------------------------------------------------------------------
.PushResetStatus:
    mov     al, [di+DPT.bInitError]
    push    ax

;;; fall-out to BootMenuPrint_HardDiskRefreshInformation.