Finally we have a 2 stage bootloader !

This one can load the ramdis up to 0xfffff  :)

1 files changed, 0 insertions, 178 deletions

diff --git a/boot/mbr.asm b/boot/mbr.asm
deleted file mode 100644
index a854615..0000000
--- a/boot/mbr.asm
+++ /dev/null
@@ -1,178 +0,0 @@
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-;   THE FOOL-BOOT-LOADER
-;    
-;   So we have just been loaded by the BIOS and are in 16-bits real mode!
-;   Now the following work will bee accomplished (chronologically):
-;
-;   NOTE: this should not exceed 446 bytes 
-;   (otherwise it does not work on my Acer Aspire)
-;
-;	* BOOT_DRIVE set 
-;
-;	* X sectors of our kernel loaded at KERNEL_OFFSET from floppy
-;
-;	* memory map made available at MEMMAP_OFFSET 
-;	    (check at MEMMEP_SIZE_OFFSET for number of entries)
-;
-;	* the VESA mode specified by VESA_MODE_SELECT will be set up 
-;	    (check at VESA_MODES, and VESA_MODE_INFO 
-;	    for additional information)
-;
-;	* interrupts disabled
-;
-;	* 32-bit protected mode set up.
-;
-;	* esp set to 0x90000
-;
-;	* A20 gate opened 
-;
-;	* and finally we will jump into the C world to kernel_main() !
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-
-;we want 16-bit instructions, before we switch to 32-bit protected mode.
-[bits 16]
-
-;define origin of boot record in memory: 0x7c00
-;this is where the BIOS per definition will put the first 
-;512 bytes of data from the boot device
-;The Boot record is identified by the last 2 magic bytes: 0xaa55 (?)
-[org 0x7c00]
-
-;;define some constants
-;;where we will load our kernel into memory and some 
-;;other memory locations
-;
-KERNEL_SECTOR equ 0x1000
-KERNEL_OFFSET equ 0x0000
-
-MEMMAP_SIZE_OFFSET equ 0x7c00+0x600
-MEMMAP_OFFSET equ 0x7c00+0x400
-VESA_MODES equ 0x8300
-VESA_MODE_INFO equ 0x8400
-VESA_MODE_SELECT equ 0x4114
-
-;
-jmp boot_16 ;start boot process
-    db 'X'
-jmp $ ;entry for other processors ;)
-    db 'X'
-;
-;;SOME Global Data, mainly info/error strings
-BOOT_DRIVE:
-    db 0xff
-STR_VERSION:
-    db "v0.5",0
-VESA_CHECK1:
-    db "1",0
-VESA_CHECK2:
-    db "2",0
-VESA_CHECK3:
-    db "3",0
-CHECK_A20:
-    db "A",0
-;
-;;lets put our temporary GDT (Global Descriptor Table) here
-;;kernel should move this away
-%include "boot/GDT.asm"
-;
-;;include 16-bit real mode routines (print_string, disk_load, vesa_setup,check_a20)
-%include "boot/disk_load_16.asm"
-;%include "boot/check_a20_16.asm"
-%include "boot/print_string_16.asm"
-%include "boot/vesa_setup_16.asm"
-;
-;;include our routines for switching to 32-bit protected mode
-%include "boot/pm.asm"
-;
-;
-;;get memory map routine
-%include "boot/memmap.asm"
-;
-;;;;;;;;; BOOT 16-bit real ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-;;lets start
-[bits 16]
-;
-boot_16:
-
-
-
-    ;first of allsetup the stack (Right under mbr)
-    ;guaranteed ~30KB space
-    mov bp,0x07bff
-    mov sp,bp
-;
-;
-    mov bx, STR_VERSION
-    call print_string
-;
-;    ;remember BOOT_DRIVE (as was set by BIOS)
-    mov [BOOT_DRIVE],dl	
-
-;   ;Load the IMAGE
-    call disk_load_16
-    
-;
-;    ;get memory map from bios before we enter 32 bit protected mode
-    mov ax,0	; set target address in es:di (0:offset)
-    mov es,ax
-    mov di,MEMMAP_OFFSET
-    call BiosGetMemoryMap    ; this will also put the number of entries 
-;			    ; of the memory map at MEMMAP_SIZE_OFFSET
-   
-;a20check:
-;
-;    mov bx, CHECK_A20
-;    call print_string
-;
-;    call check_a20
-;    cmp ax,0
-;    je a20check ;hang if a20 is disabled!
-
-;    ;VESA:  also setup vesa stuff before entering 32 bit protected mode
-;   call VesaSetup
-;
-;    ;finally lets enter Protected mode!!!
-    call switch_to_pm
-;
-;;;;;;;;; BOOT 32-bit protected mode;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-[bits 32]
-boot_32_pm:
-;
-
-;    ;enable A20
-;    ;http://www.brokenthorn.com/Resources/OSDev9.html
-;    ;Method 3.1: Enables A20 through keyboard controller
-;    ;Not all keyboard controllers support this
-;    ; does not work in virtual box (with VT-x accerleration?) 
-
-;     mov al, 0xdd  ; command 0xdd: enable a20
-;     mov al, 0xdf  ; command 0xdf: disable a20
-;     out 0x64, al  ; send command to controller
-
-    ;Fast A20 Gate:
-    ;http://wiki.osdev.org/A20_Line
-    
-    in al, 0x92
-    or al, 2
-    out 0x92, al
-
-    ; call kernel!
-    mov eax,0					;booting processor
-    call 0x10000 ;KERNEL_SECTOR:KERNEL_OFFSET	        ;jump into our Kernel!
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-
-;fill partition table (4x16byte) with zeroes. 
-;(otherwise my Acer Aspire will not boot)
-;times 64 db 0x0
-
-;so we get identified as MBR
-times 510-($-$$) db 0x0
-;dw 0x0
-dw 0xaa55
-