Merge pull request #4 from E-Almqvist/dev

Progress

src/bootloader.asm

@@ -17,8 +17,8 @@ jmp $  ; inf loop
 %include "elib/io.asm"
 
 ;; Data
-welcomeString: db "Welcome to    e Operating-System (eOS)", ASCII_END
+welcomeString: db "Welcome to: e Operating-System (eOS)", ASCII_END
-infoString: db "eOS: 2021 v0.0"
+infoString: db    "Version 2021 0.0", ASCII_END
 
 ; Magic BIOS number 
 times 510-($-$$) db 0

src/elib/convert.asm

@@ -0,0 +1,34 @@
+HEX_OUT: db "0x0000", ASCII_END
+
+; SR to convert hex values into ASCII strings
+; This SR is going to mess up some registers
+; since it fills the register with the desired 
+; pointer toward the string.
+hexToASCII:
+	; pusha
+	mov cx, 0 ; incrementor
+
+	hexloop:
+		cmp cx, 4 ; check if we reached the end 
+		je return ; if so just return our new ASCII string
+		
+		mov ax, dx
+
+		; mask the hex value in ax so that we get the last "char"
+		and ax, 0x000f
+	
+		; convert ax into ASCII (numeric)
+		add al, ASCII_OFFSET_NUM ; add 0x30
+
+		cmp al, 0x39 ; if al (char) > "9"
+		jle hexloop2
+
+		add al, 7 ; 7 distance from "A"
+
+	hexloop2:
+		mov bx, HEX_OUT + 5
+
+
+	return:
+		mov bx, HEX_OUT
+		ret

src/equ/ASCII.asm

@@ -7,3 +7,7 @@ ASCII_VERTICAL_TAB equ 11
 ASCII_LINEBREAK equ 10
 ASCII_CARRIAGE_RETURN equ 13
 ASCII_CLEAR equ 12
+
+; Offsets
+ASCII_OFFSET_NUM equ 0x30
+ASCII_OFFSET_CHAR equ 0x40