BootManager: add support for page down/up/home/end keys

* Page down is the same as the end key, and just selects the last entry
  in the boot menu.
* Likewise, page up is the same as the home key.

Change-Id: Ibaf8559b0f68462834395aaec8fb22554d7a90f6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3555
Reviewed-by: John Scipione <[email protected]>
Reviewed-by: Jérôme Duval <[email protected]>

src/apps/bootmanager/bootman.S

@@ -134,6 +134,10 @@
 ; Key codes
 %assign KEY_DOWN						0x50
 %assign KEY_UP							0x48
+%assign KEY_PAGE_DOWN					0x51
+%assign KEY_PAGE_UP						0x49
+%assign KEY_HOME						0x47
+%assign KEY_END							0x4f
 %assign KEY_RETURN						0x1C
 
 ; Modifier key bitmasks
@@ -431,9 +435,19 @@ inputLoop:
 	cmp		ah, KEY_DOWN
 	je		selectNextPartition
 
+	cmp		ah, KEY_PAGE_DOWN
+	je		selectLastPartition
+	cmp		ah, KEY_END
+	je		selectLastPartition
+
 	cmp		ah, KEY_UP
 	je		selectPreviousPartition
 
+	cmp		ah, KEY_PAGE_UP
+	je		selectFirstPartition
+	cmp		ah, KEY_HOME
+	je		selectFirstPartition
+
 	cmp		ah, KEY_RETURN
 	jne		inputLoop
 	jmp		bootSelectedPartition
@@ -448,6 +462,12 @@ selectNextPartition:
 	mov		[bp + selection], ax
 	jmp		mainLoop
 
+selectLastPartition:
+	mov		ax, [listItemCount]
+	dec		ax
+	mov		[bp + selection], ax
+	jmp		mainLoop
+
 selectPreviousPartition:
 	mov		ax, [bp + selection]
 	or		ax, ax
@@ -458,6 +478,11 @@ selectPreviousPartition:
 	mov		[bp + selection], ax
 	jmp		mainLoop
 
+selectFirstPartition:
+	xor		ax, ax
+	mov		[bp + selection], ax
+	jmp		mainLoop
+
 
 ; ======================= Print the OS list ============================
 printMenu: