From 8b00afe1b255682cf8c219ab44a3d9fc590cc003 Mon Sep 17 00:00:00 2001
From: kotorifan <kotorifan05@gmail.com>
Date: Sun, 8 Mar 2026 16:37:02 +0100
Subject: Clear message at bootup without extra ascii characters

---
 src/boot/boot.stage2.asm             | 10 +++++-----
 src/common/common.asm                |  2 +-
 src/common/common.protmode.clear.asm |  9 +++++++--
 src/common/common.protmode.print.asm | 24 +++++++++++++++---------
 src/kernel/kernel.asm                | 16 +++++++---------
 5 files changed, 35 insertions(+), 26 deletions(-)

(limited to 'src')

diff --git a/src/boot/boot.stage2.asm b/src/boot/boot.stage2.asm
index 13d844b..5131786 100644
--- a/src/boot/boot.stage2.asm
+++ b/src/boot/boot.stage2.asm
@@ -46,10 +46,10 @@ _protected_mode:
         mov esp, 0x90000
         and esp, 0xFFFFFFF0         ; Align to 16-byte boundary
 
-        mov esi, boot_protmode_msg
-        call _print_string_pm_vga 
+        ;; mov esi, boot_protmode_msg
+        ;; call _print_string_pm_vga 
 
-        call 0x10000
+        jmp CODE_SEG32:0x10000
         
 boot_s2_msg:    
         db "Entering Stage 2", 13, 10, 0
@@ -63,10 +63,10 @@ align 16
 DAP_kernel: 
         db 0x10
         db 0
-        dw 1                         ; Number of sectors
+        dw 16                         ; Number of sectors
         dw 0x0000   
         dw 0x1000                    ; Offset
-        dq 66                        ; Starting sector
+        dq 66                       ; Starting sector
 
 %include "boot.stage1.print.asm"
 %include "boot.stage2.a20.asm"
diff --git a/src/common/common.asm b/src/common/common.asm
index a98ef67..87444db 100644
--- a/src/common/common.asm
+++ b/src/common/common.asm
@@ -13,7 +13,7 @@
 %define VGA_COLOR_BLACK 0
 %define VGA_COLOR_GREEN 2
 %define VGA_COLOR_RED 4
-%define VGA_WHITE_ON_BLACK 0x0f20
+%define VGA_WHITE_ON_BLACK 0x0f
 %define VGA_BUFFER 0xb8000
 %define VGA_SCREEN_X 80
 %define VGA_SCREEN_Y 25
diff --git a/src/common/common.protmode.clear.asm b/src/common/common.protmode.clear.asm
index 47cb980..8d26e2f 100644
--- a/src/common/common.protmode.clear.asm
+++ b/src/common/common.protmode.clear.asm
@@ -1,13 +1,18 @@
 ;; common.protmode.print.asm
 
+%ifndef COMMON_PROTMODE_CLEAR_ASM
+%define COMMON_PROTMODE_CLEAR_ASM
+
 %include "common.asm"
 
 _clear_screen:  
         mov edi, VGA_BUFFER
         mov ecx, VGA_SCREEN
-        mov ax, VGA_WHITE_ON_BLACK
+        mov ax, 0x0f20          ; Empty char with white on black
 .clear:
-        mov [edi], eax
+        mov [edi], ax
         add edi, 2
         loop .clear
         ret
+
+%endif
diff --git a/src/common/common.protmode.print.asm b/src/common/common.protmode.print.asm
index 5995e69..82ed3f4 100644
--- a/src/common/common.protmode.print.asm
+++ b/src/common/common.protmode.print.asm
@@ -1,11 +1,13 @@
 ;; common.protmode.print.asm
+%ifndef COMMON_PROTMODE_PRINT_ASM
+%define COMMON_PROTMODE_PRINT_ASM
 
 %include "common.asm"
 
 _print_string_pm_vga:   
         pusha
         mov edi, VGA_BUFFER
-        mov ah, WB_COLOR
+        mov ah, VGA_WHITE_ON_BLACK
         xor ecx, ecx
         xor edx, edx
 
@@ -14,22 +16,26 @@ _print_string_pm_vga:
         test al, al
         jz .done
 
-        push eax
-        mov eax, edx
-        imul eax, eax, 160
-        lea edi, [VGA_BUFFER + eax]
-        lea edi, [edi + ecx * 2]
-        pop eax
+        mov ebx, edx
+        imul ebx, ebx, 160
+        lea ebx, [VGA_BUFFER + ebx + ecx * 2]
+        
+        mov ah, VGA_WHITE_ON_BLACK
+        mov [ebx], ax
         
 ;; Advance cursor
         inc cl
-        cmp cl, 80
-        jb .print_loop
+        cmp cl, 80              ; Check if screen is full X pos
+        jne .print_loop
         xor cl, cl
         inc dl
+        cmp dl, 25
+        jb .print_loop          ; Check if screen is full Y pos
 
         jmp .print_loop
         
 .done:
         popa
         ret
+
+%endif
diff --git a/src/kernel/kernel.asm b/src/kernel/kernel.asm
index 022a93d..ca7339e 100644
--- a/src/kernel/kernel.asm
+++ b/src/kernel/kernel.asm
@@ -2,21 +2,19 @@
 [bits 32]
 [org 0x10000]
 
-%include "common.asm"
-%include "common.protmode.print.asm"
-%include "common.protmode.clear.asm"
-
 _kernel_entry:  
         cli                         ; No interrupts yet
-        mov ebp, RET_STACK
-        mov esp, DATA_STACK
 
         call _clear_screen
-        call _show_welcome_msg
+        mov esi, welcome_msg
+        call _print_string_pm_vga
         
 .halt: hlt
         jmp .halt
 
 welcome_msg:
-        db "Welcome...", 13, 10, 0
-   
+        db "Welcome...", 0
+        
+%include "common.asm"
+%include "common.protmode.print.asm"
+%include "common.protmode.clear.asm"
-- 
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