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fix: correction de bogue et optimisation du code et suppression de la detection du CPU

This commit is contained in:
Nicolas Hordé 2007-04-02 13:51:30 +00:00
parent d7d8433a22
commit 01496ab3b8
1 changed files with 28 additions and 59 deletions
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73
boot/boot12.asm
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@ -26,38 +26,25 @@ Serial_Number dd 0x01020304 ;N
Disk_Name db "COS2000 " ;Nom de volume Disk_Name db "COS2000 " ;Nom de volume
Fat_Type db "FAT12 " ;Type de système de fichiers Fat_Type db "FAT12 " ;Type de système de fichiers
;Cpu_Message db "CPU test",0 Boot_Message db "Demarrage de COS",0
Boot_Message db "Booting ",0 Loading_Message db "Chargement",0
Finding_Message db "System ",0 System_File db "LOADER SYS"
Loading_Message db "Loading ",0
System_File db "SYSTEM SYS"
Is_Ok db " [ OK ]",0x0A,0x0D,0 Is_Ok db " [ OK ]",0x0A,0x0D,0
Is_Failed db "[Failed]",0x0A,0x0D,"Press a key",0x0A,0x0D,0 Is_Failed db " [Erreur]",0x0A,0x0D,"<Appuyer une touche>",0
The_Dot db '.',0 The_Dot db '.',0
Boot_Error: Boot_Error:
mov si,Is_Failed mov si,Is_Failed
call ShowString call ShowString
mov ah,0 xor ax,ax
int 0x16 int 0x16
int 0x19 int 0x19
Boot_Ok: Boot_Ok:
mov al,[Stage]
cmp al,0
jz No_Ok
mov si,Is_Ok mov si,Is_Ok
call ShowString call ShowString
No_Ok:
xor ah,ah
mov si,ax
add si,Boot_Message ;Cpu_Message
call ShowString
add byte [Stage],0x09
ret ret
Stage db 0
Boot: Boot:
push cs push cs
push cs push cs
@ -69,21 +56,29 @@ Boot:
mov ss,ax mov ss,ax
mov sp,0xFFFF mov sp,0xFFFF
sti sti
; call Detect_Cpu mov si,Boot_Message
; jc Boot_Error call ShowString
call Boot_Ok
xor ax,ax xor ax,ax
int 0x13 int 0x13
jc Boot_Error jc Boot_Error
mov cx,[Reserved_Sectors] mov cx,[Reserved_Sectors]
add cx,[Sectors_Hidden] add cx,[Sectors_Hidden]
adc cx,[Sectors_Hidden+2] adc cx,[Sectors_Hidden+2]
mov bx,[Sectors_Per_Fat]
mov di,Fat_Buffer mov di,Fat_Buffer
push bx
push cx
readfat:
call ReadSector call ReadSector
jc Boot_Error jc Boot_Error
inc cx
add di,[Sectors_Size]
dec bx
jnz readfat
pop cx
pop bx
xor ax,ax xor ax,ax
mov al,[Fats_Number] mov al,[Fats_Number]
mov bx,[Sectors_Per_Fat]
mul bx mul bx
add cx,ax add cx,ax
mov ax,32 mov ax,32
@ -94,6 +89,8 @@ Boot:
mov word [Serial_Number],ax mov word [Serial_Number],ax
xor dx,dx xor dx,dx
call Boot_Ok call Boot_Ok
mov si,Loading_Message
call ShowString
Find_System: Find_System:
mov di,Buffer mov di,Buffer
call ReadSector call ReadSector
@ -121,12 +118,11 @@ Next_Root_Entrie:
jmp Find_System jmp Find_System
System_Found: System_Found:
mov cx,[di+26] mov cx,[di+26]
mov ax,0x0071 mov ax,0x0070
mov es,ax mov es,ax
push es push es
mov di,0x100 mov di,0x100
push di push di
call Boot_Ok
mov si,The_Dot mov si,The_Dot
Resume_Loading: Resume_Loading:
cmp cx,0x0FF0 cmp cx,0x0FF0
@ -232,34 +228,7 @@ End_Show:
popa popa
ret ret
;======================DETECTCPU======================
;Detecte si le processeur est un 386 au mini
;->
;<- Flag Carry si erreur
;=====================================================
;Detect_Cpu:
; push ax ; test if 8088/8086 is present (flag bits 12-15 will be set)
; xor ah,ah ; ah = 0
; push ax ; copy ax into the flags
; popf ; with bits 12-15 clear
; pushf ; Read flags back into ax
; pop ax
; and ah,0xF0 ; check if bits 12-15 are set
; cmp ah,0xF0
; je No_386 ; no 386 detected (8088/8086 present)
; ; check for a 286 (bits 12-15 are clear)
; mov ah,0xF0 ; set bits 12-15
; push ax ; copy ax onto the flags
; popf
; pushf ; copy the flags into ax
; pop ax
; and ah,0xF0 ; check if bits 12-15 are clear
; jz No_386 ; no 386 detected (80286 present)
; clc
; ret
;No_386:
; stc
; ret
times 510-($-$$) db ' ' times 510-($-$$) db ' '