source: xtideuniversalbios/trunk/Configurator/Src/Main.asm@ 98

; File name     :   main.asm
; Project name  :   XTIDE Univeral BIOS Configurator
; Created date  :   16.4.2010
; Last update   :   30.4.2010
; Author        :   Tomi Tilli
; Description   :   Program start and exit.         

; Include .inc files
%include "emulate.inc"          ; Emulation library. Must be first!
%include "BiosData.inc"         ; For BIOS Data Area variables
%include "Variables.inc"        ; Global variables for this program
%include "MenuPage.inc"         ; Menu page and item structs
%include "RomVars.inc"          ; XTIDE Universal BIOS ROMVARS


; Section containing code
SECTION .text

; Program first instruction.
ORG 100h                        ; Code starts at offset 100h (DOS .COM)
Start:
    jmp     Main_Start

; Include library sources
%include "math.asm"
%include "print.asm"
%include "string.asm"
%include "keys.asm"
%include "file.asm"
%include "menu.asm"

; Include sources for this program
%include "Strings.asm"              ; For program strings
%include "MenuEvent.asm"            ; For handling menu library events
%include "MenuEventHotkey.asm"      ; For handling menu hotkeys
%include "MenuPage.asm"             ; For accessing MENUPAGE structs
%include "MenuPageItem.asm"         ; For accessing MENUPAGEITEM structs
%include "MenuPageItemFormat.asm"   ; For printing menuitem names
%include "FormatTitle.asm"          ; For printing menu title
%include "BiosFile.asm"             ; For loading and saving BIOS file
%include "EEPROM.asm"               ; For handling EEPROM contents
%include "Flash.asm"                ; For flashing EEPROM

%include "MainMenu.asm"             ; For main menu
%include "ConfigurationMenu.asm"    ; For XTIDE Universal BIOS configuration menu
%include "BootLoaderValueMenu.asm"  ; For selecting boot loader type
%include "IdeControllerMenu.asm"    ; For configuring IDEVARS
%include "BusTypeValueMenu.asm"     ; For selecting bus type
%include "DrvParamsMenu.asm"        ; For configuring DRVPARAMS
%include "BootMenuSettingsMenu.asm" ; For configuring boot menu
%include "FlashMenu.asm"            ; For flash settings
%include "SdpCommandValueMenu.asm"  ; For selecting SDP command


;--------------------------------------------------------------------
; Program start
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
Main_Start:
    call    MenuDraw_ClrScr     ; Clear screen
    call    Main_InitializeVariables

    ; Create main menu
    mov     si, g_MenuPageMain  ; DS:SI points to MENUPAGE for main menu
    call    MainMenu_SetMenuitemVisibility
    call    Main_EnterMenu      ; Enter menu
    call    MenuDraw_ClrScr     ; Clear screen

    ; Exit to DOS
    mov     ax, 4C00h           ; Exit to DOS
    int     21h


;--------------------------------------------------------------------
; Initializes global variables used in this program.
;
; Main_InitializeVariables
;   Parameters:
;       Nothing
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX, SI, DI, ES
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
Main_InitializeVariables:
    ; Zero all global variables
    mov     di, g_cfgVars       ; ES:DI points to global variables
    mov     cx, (CFGVARS_size+ROMVARS_size)/2   ; Size in words
    xor     ax, ax              ; To store zero
    cld                         ; STOSW to increment DI
    rep stosw                   ; Zero all variables

    ; Find Xtide Universal BIOS segment
    mov     dx, 0D000h          ; XTIDE default segment
    call    EEPROM_FindXtideUniversalBiosROM
    jnc     SHORT .InitializeVariables
    mov     dx, es              ; XTIDE segment to DX

ALIGN JUMP_ALIGN
.InitializeVariables:
    mov     WORD [g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_CHECKSUM
    mov     WORD [g_cfgVars+CFGVARS.wEepromSegment], dx
    mov     BYTE [g_cfgVars+CFGVARS.bPageSize], 1
    mov     BYTE [g_cfgVars+CFGVARS.bSdpCommand], CMD_SDP_ENABLE
    ret


;--------------------------------------------------------------------
; Enters main or submenu.
;
; Main_EnterMenu
;   Parameters:
;       DS:SI:  Ptr to MENUPAGE (also menu user far pointer for MENUVARS.user)
;   Returns:
;       CX:     Index of last pointed Menuitem (not necessary selected with ENTER)
;               FFFFh if cancelled with ESC
;   Corrupts registers:
;       AX, BX, CX, DX, SI, DI
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
Main_EnterMenu:
    call    MenuPage_GetNumberOfVisibleItems
    mov     cl, al                              ; Number of visible menuitems to CL
    mov     ax, (CNT_SCRN_ROW<<8) | WIDTH_MENU
    mov     bx, (CNT_INFO_LINES<<8) | CNT_TITLE_LINES
    mov     ch, [cs:g_cfgVars+CFGVARS.wFlags]   ; Load program flags to CH
    and     ch, FLG_MNU_HIDENFO                 ; Clear all but info flag
    xor     dx, dx                              ; No selection timeout
    mov     di, MenuEvent_Handler               ; CS:DI points to menu event handler
    inc     BYTE [cs:g_cfgVars+CFGVARS.bMenuCnt]
    call    Menu_Enter
    dec     BYTE [cs:g_cfgVars+CFGVARS.bMenuCnt]
    jz      SHORT .Return

    ; Update info visibility for previous menu where to resume
    test    BYTE [cs:g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_HIDEINFO
    jnz     SHORT .HideInfo
    call    Menu_ShowInfo
    ret
ALIGN JUMP_ALIGN
.HideInfo:
    call    Menu_HideInfo
.Return:
    ret


; Section containing uninitialized data
SECTION .bss

ALIGN WORD_ALIGN    ; All global variables
g_cfgVars:      resb    CFGVARS_size