Merge pull request #5 from E-Almqvist/dev

Update

src/bootloader.asm

@@ -6,6 +6,13 @@ call println
 mov bx, infoString
 call println
 
+mov bx, hexTestPrefixString
+call print
+
+mov dx, 0x002e ; test the conversion
+call hexToASCII
+call println
+
 jmp $  ; inf loop
 
 ;; includes
@@ -15,10 +22,12 @@ jmp $  ; inf loop
 
 ; eLIB
 %include "elib/io.asm"
+%include "elib/convert.asm"
 
 ;; Data
-welcomeString: db "Welcome to: e Operating-System (eOS)", ASCII_END
+welcomeString:		db "Welcome to: e Operating-System (eOS)", ASCII_END
-infoString: db    "Version 2021 0.0", ASCII_END
+infoString: 		db "Version 2021 0.0", ASCII_END
+hexTestPrefixString:	db "Hex printing test: ", ASCII_END
 
 ; Magic BIOS number 
 times 510-($-$$) db 0

src/elib/convert.asm

@@ -4,13 +4,13 @@ HEX_OUT: db "0x0000", ASCII_END
 ; 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
+		je hexreturn ; if so just return our new ASCII string
 		
 		mov ax, dx
 
@@ -26,9 +26,16 @@ hexToASCII:
 		add al, 7 ; 7 distance from "A"
 
 	hexloop2:
+		; Write the char into the HEX_OUT string
 		mov bx, HEX_OUT + 5
+		sub bx, cx
+
+		mov [bx], al ; write the char into the string
+		ror dx, 4 ; "rotate" the string
 
+		inc cx ; increment and go onto next char
+		jmp hexloop
 
-	return:
+	hexreturn:
 		mov bx, HEX_OUT
 		ret