ScrapExplorer - lost-version.asm
Home / arch / x86 / x86bootdisk / src
Lines: 1 | Size: 1395 bytes
[Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)] 
[FILE BEGIN]
1; SPDX-License-Identifier: PROPRIETARY
2; Lost version
3;
4; I seem to have found this on a random drive I had, I cant remember when I
5; made it but it was copyrighted 2024.
6;
7; This version seems to have the very advanced blue screen colour syscall, fun.
8;
9; Copyright (C) 2024 0x4248
10
11
12[ORG 0x7c00]
13[BITS 16]
14jmp start ; Jump to start
15
16start:
17   ; Sertting up the stack
18   xor ax, ax ; clear ax
19   mov ds, ax ; set ds to 0
20   cld        ; clear direction flag
21
22   mov si, boot_msg ; set si to msg
23   call bios_print ; call bios_print
24   call blue_screen
25   call halt_cpu
26
27boot_msg db 'Booted!', 0, 13, 10
28
29bios_print:
30   lodsb          ; load byte from si to al
31   or al, al      ; check if al is 0
32   jz done        ; if al is 0, jump to done
33   mov ah, 0x0E   ; set teletype output
34   mov bh, 0      ; set page number
35   int 0x10       ; call bios interrupt
36   jmp bios_print ; jump to bios_print
37
38done:
39   ret
40
41blue_screen:
42   ; Before halting we set the screen to blue
43   mov ax, 0x0600  ; BIOS function to scroll (clear) the screen
44   mov ax, 0x0B00  ; BIOS function to set background color
45   mov bh, 0x00    ; Page number
46   mov bl, 0x01    ; Foreground: white (0xF), Background: blue (0x1)
47   int 0x10        ; Call BIOS interrupt to set color
48
49
50halt_cpu:
51   hlt ; halt the CPU
52
53times 510-($-$$) db 0 ; Fill the rest of the sector with 0
54db 0x55 ; Boot signature
55db 0xAA ; Boot signature
56
[FILE END]
(C) 2025 0x4248
(C) 2025 4248 Media and 4248 Systems, All part of 0x4248
See LICENCE files for more information. Not all files are by 0x4248 always check Licencing.