source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectPrint.asm@ 241

; Project name  :   XTIDE Universal BIOS
; Description   :   Functions for printing drive detection strings.

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; Prints BIOS name and segment address where it is found.
;
; DetectPrint_RomFoundAtSegment
;   Parameters:
;       Nothing
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, SI, DI
;--------------------------------------------------------------------
DetectPrint_RomFoundAtSegment:
    push    bp
    mov     bp, sp
    mov     si, g_szRomAt
    ePUSH_T ax, ROMVARS.szTitle         ; Bios title string
    push    cs                          ; BIOS segment
        
DetectPrint_BootMenuPrint_FormatCSSIfromParamsInSSBP_Relay:     
    jmp     BootMenuPrint_FormatCSSIfromParamsInSSBP


;--------------------------------------------------------------------
; DetectPrint_StartDetectWithMasterOrSlaveStringInAXandIdeVarsInCSBP
;   Parameters:
;       CS:CX:  Ptr to "Master" or "Slave" string
;       CS:BP:  Ptr to IDEVARS
;       SI:     Ptr to template string 
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, SI, DI, CX
;--------------------------------------------------------------------
DetectPrint_StartDetectWithMasterOrSlaveStringInAXandIdeVarsInCSBP:

    mov     ax, [cs:bp+IDEVARS.wPort]       ; for IDE: AX=port address, DH=.bDevice
    mov     dx, [cs:bp+IDEVARS.bDevice-1]   ; for Serial: AL=port address>>2, AH=baud rate
                                            ;             DL=COM number character, DH=.bDevice

    push    bp                              ; setup stack for call to 
    mov     bp, sp                          ; BootMenuPrint_FormatCSSIfromParamsInSSBP

    push    cx                              ; Push "Master" or "Slave"
        
    mov     cl, (g_szDetectPort-$$) & 0xff  ; Setup print string for standard IDE
                                            ; Note that we modify only the low order bits of CX a lot here,
                                            ; saving code space rather than reloading CX completely.
                                            ; This optimization requires that all the g_szDetect* strings are
                                            ; on the same 256 byte page, which is checked in strings.asm.

    cmp     dx, DEVICE_SERIAL_PORT << 8     ; Check if this is a serial device, 
                                            ; And also check if DL is zero, check with the jz below
                                            ; This optimization requires that DEVICE_SERIAL_PORT be 
                                            ; the highest value in the DEVICE_* series, ensuring that
                                            ; anything less in the high order bits is a different device.

    jl      .pushAndPrint                   ; CX = string to print, AX = port address, DX won't be used

    mov     cl, (g_szDetectCOM-$$) & 0xff   ; Setup print string for COM ports
    push    cx                              ; And push now.  We use the fact that format strings can contain
                                            ; themselves format strings.

    push    dx                              ; Push COM number character
                                            ; If the strnig is going to be "Auto", we will push a NULL (zero)
                                            ; here for the COM port number, which will be eaten by the 
                                            ; print routine (DisplayPrint_CharacterFromAL), resulting in 
                                            ; just "COM" being printed without a character after it.
                
    mov     cl, (g_szDetectCOMAuto-$$) & 0xff   ; Setup secondary print string for "Auto"
        
    jz      .pushAndPrint                   ; CX = string to print, AX and DX won't be used
        
    mov     cl, (g_szDetectCOMLarge-$$) & 0xff  ; Setup secondary print string for "COMn/xx.yK"

    mov     al,ah                           ; baud rate divisor to AL
    cbw                                     ; clear AH, AL will always be less than 128
    xchg    si,ax                           ; move AX to SI for divide
    mov     ax,1152                         ; baud rate to displa is 115200/divisor, the "00" is handled
                                            ; in the print strings
    xor     dx,dx                           ; clear top 16-bits of dividend
    div     si                              ; and divide...  Now AX = baud rate/100, DX = 0 (always a clean divide)
        
    mov     si,10                           ; Now separate the whole portion from the fractional for "K" display
    div     si                              ; and divide...  Now AX = baud rate/1000, DX = low order digit
        
    cmp     ax,si                           ; <= 10: "2400", "9600", etc.; >10: "19.2K", "38.4K", etc.
    jae     .pushAndPrint

    mov     cl, (g_szDetectCOMSmall-$$) & 0xff  ; Setup secondary print string for "COMn/XXy00"
        
.pushAndPrint:  
    push    cx                              ; Push print string
    push    ax                              ; Push high order digits, or port address, or N/A
    push    dx                              ; Push low order digit, or N/A

    mov     si, g_szDetectOuter             ; Finally load SI with wrapper string "IDE %s at %s: "

    jmp     short DetectPrint_BootMenuPrint_FormatCSSIfromParamsInSSBP_Relay    


;--------------------------------------------------------------------
; DetectPrint_DriveNameFromBootnfoInESBX
;   Parameters:
;       ES:BX:  Ptr to BOOTNFO (if drive found)
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, SI
;--------------------------------------------------------------------
DetectPrint_DriveNameFromBootnfoInESBX:
    push    di
    push    bx

    lea     si, [bx+BOOTNFO.szDrvName]
    mov     bx, es
    CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromBXSI
    CALL_DISPLAY_LIBRARY PrintNewlineCharacters

    pop     bx
    pop     di
    ret