more work towards MEGA65 native mode screen support

src/aliases/,aliases_ram_lowmem_m65.s

@@ -20,6 +20,13 @@
 	.label M65_LPNT_KERN = $EE  // $EE-$F1  4-byte pointer for temporary usage by KERNAL
 	.label M65_TMP__K2   = $F2  // $F2      -- UNUSED -- temporary value for various Kernal routines
 
+	//
+	// Page 0 - other reused values
+	//
+
+	.label M65__TXTROW   = PNTR //          screen row
+	.label M65__TXTCOL   = TBLX //          screen column
+
 	//
 	// Pages 4-7 - reused screen memory
 	//