gbowne1/ClassicOS
2
2
Fork 0
mirror of https://github.com/gbowne1/ClassicOS.git synced 2024-11-21 13:56:53 -08:00
Code Issues 2 Packages Projects 1 Releases Wiki Activity

removing unecessary boot assembly files

Browse Source
This commit is contained in:
Gregory Kenneth Bowne 2024-08-31 17:21:12 -07:00
parent d3a41ed76d
commit 3759ce86b5
4 changed files with 0 additions and 160 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

0
boot4.asm → boot.asm
View File

19
boot1.asm
View File

@ -1,19 +0,0 @@
bits 16
org 0x7c00
boot:
mov si,hello
mov ah, 0x0e
.loop:
lodsb
or al,al
jz halt
int 0x10
jmp .loop
halt:
cli
hlt
hello: db "Hello world!",0
times 510 - ($-$$) db 0
dw 0xaa55

63
boot2.asm
View File

@ -1,63 +0,0 @@
bits 16
org 0x7c00
boot:
mov ax, 0x2401
int 0x15
mov ax, 0x3
int 0x10
cli
lgdt [gdt_pointer]
mov eax, cr0
or eax,0x1
mov cr0, eax
jmp CODE_SEG:boot2
gdt_start:
dq 0x0
gdt_code:
dw 0xFFFF
dw 0x0
db 0x0
db 10011010b
db 11001111b
db 0x0
gdt_data:
dw 0xFFFF
dw 0x0
db 0x0
db 10010010b
db 11001111b
db 0x0
gdt_end:
gdt_pointer:
dw gdt_end - gdt_start
dd gdt_start
CODE_SEG equ gdt_code - gdt_start
DATA_SEG equ gdt_data - gdt_start
bits 32
boot2:
mov ax, DATA_SEG
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
mov esi,hello
mov ebx,0xb8000
.loop:
lodsb
or al,al
jz halt
or eax,0x0100
mov word [ebx], ax
add ebx,2
jmp .loop
halt:
cli
hlt
hello: db "Hello world!",0
times 510 - ($-$$) db 0
dw 0xaa55

78
boot3.asm
View File

@ -1,78 +0,0 @@
bits 16
org 0x7c00
boot:
mov ax, 0x2401
int 0x15
mov ax, 0x3
int 0x10
mov [disk],dl
mov ah, 0x2 ;read sectors
mov al, 1 ;sectors to read
mov ch, 0 ;cylinder idx
mov dh, 0 ;head idx
mov cl, 2 ;sector idx
mov dl, [disk] ;disk idx
mov bx, copy_target;target pointer
int 0x13
cli
lgdt [gdt_pointer]
mov eax, cr0
or eax,0x1
mov cr0, eax
mov ax, DATA_SEG
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
jmp CODE_SEG:boot2
gdt_start:
dq 0x0
gdt_code:
dw 0xFFFF
dw 0x0
db 0x0
db 10011010b
db 11001111b
db 0x0
gdt_data:
dw 0xFFFF
dw 0x0
db 0x0
db 10010010b
db 11001111b
db 0x0
gdt_end:
gdt_pointer:
dw gdt_end - gdt_start
dd gdt_start
disk:
db 0x0
CODE_SEG equ gdt_code - gdt_start
DATA_SEG equ gdt_data - gdt_start
times 510 - ($-$$) db 0
dw 0xaa55
copy_target:
bits 32
hello: db "Hello more than 512 bytes world!!",0
boot2:
mov esi,hello
mov ebx,0xb8000
.loop:
lodsb
or al,al
jz halt
or eax,0x0F00
mov word [ebx], ax
add ebx,2
jmp .loop
halt:
cli
hlt
times 1024 - ($-$$) db 0