Loading from disk works, but jumping to the kernel does not

asm/libinterrupt.S

@@ -1,26 +1,59 @@
 resetFloppy:
-mov ax, 0                      ; reset floppy disk (only need ah, reset
-                               ; al while we're here though)
-mov dl, 0                      ; use drive 0 (first floppy)
-int 0x13
-jc resetFloppy
-ret
+	mov ah, 0                      ; reset floppy disk
+	mov dl, 0                      ; use drive 0 (first floppy)
+	int 0x13	
+	jc resetFloppy
+	ret
 
-loadDiskSector:
+	;; set al = how many sectors to read
+	;; set ch = what track to read from
+	;; set cl = what sector on the track to start reading
+	;; set es:bx = where to store the disk data
+loadFloppyDiskSectors:
+	mov ah, 0x02		; int 0x13 function 2 (read sectors from disk)
+	mov dh, 0		; head 0 (assume simple small floppy)
+	mov dl, 0		; drive 0 = floppy drive
+	int 0x13
+	jc loadFloppyDiskSectors ; retry on errors (not much else we can do)
 
+blankScreen:
+	push cx
+	mov cx, 0x0
+_blankScreen_next:
+	mov al, 0x20            ; blank space
+	call printCharacter
+	inc cx
+	cmp cx, 0x7d0		; 80 * 25 screen = 0x7d0
+	jne _blankScreen_next
+_blankScreen_exit:
+	pop cx
+	ret
+	
+	;; set dh = row
+	;; set dl = column
+setCursorPosition:
+	mov ah, 0x02
+	mov bh, 0
+	int 0x10
+	ret
+	
+	;;  set al = character to display
+printCharacter:                 ; print a single character to the display
+	mov ah, 0x0e            ; int 0x10 is the entire display control, 
+				; 0x0e means teletype output
+	mov bh, 0x00		; Print on the zero (primary) page
+	mov bl, 0x07		; Color. 0x07 is grey on black.
+	int 0x10
+	ret
 
-printCharacter:                ; print a single character to the display
-mov ah, 0x0e                   ; int 0x10 is the entire display control, 
-	                       ; 0x0e means teletype output
-mov bh, 0x00                   ; Print on the zero (primary) page
-mov bl, 0x07                   ; Color. 0x07 is grey on black.
-int 0x10
-ret
-
+	;;  set si = string to display
 printString:                   ; print the entire string pointed to by si
-mov al, [si]                   ; [x] == *x, dereferencing source index
-call printCharacter
-inc si
-cmp al, 0x0                    ; found the trailing NULL?
-jne printString
-ret
+_printString_next:
+	mov al, [si]                   ; [x] == *x, dereferencing source index
+	cmp al, 0x0                    ; found the trailing NULL?
+	je _printString_exit
+	call printCharacter
+	inc si
+	jmp _printString_next
+_printString_exit:
+	ret