Add div_FAC2_MEM

STATUS.md

@@ -225,6 +225,7 @@ Floating point mathematical routines - not official, but well known and broadly
 | `$BA90`   | `get_FAC2_via_INDEX`   | DONE     | From the Microsoft BASIC, no label                 |
 | `$BAE2`   | `mul10_FAC1`           | DONE     | From the Microsoft BASIC, original name: MUL10     |
 | `$BAFE`   | `div10_FAC1_p`         | DONE     | From the Microsoft BASIC, original name: DIV10     |
+| `$BB07`   | `div_FAC2_MEM`         | DONE     | From the Microsoft BASIC, original name: FDIVF     |
 | `$BB0F`   | `div_MEM_FAC1`         | DONE     |                                                    |
 | `$BB12`   | `div_FAC2_FAC1`        | DONE     |                                                    |
 | `$BB8F`   | `mov_RES_FAC1`         | DONE     | From the Microsoft BASIC, original name: MOVFR     |

src/basic/math/bb07.div_FAC2_MEM.s

@@ -0,0 +1,27 @@
+;; #LAYOUT# STD *       #TAKE
+;; #LAYOUT# X16 BASIC_0 #TAKE-OFFSET 2000
+;; #LAYOUT# *   BASIC_0 #TAKE
+;; #LAYOUT# *   *       #IGNORE
+
+; This file is under the MIT license, it contains code released by Microsoft Corporation.
+; See LICENSE for more information.
+
+; Math package - divide FAC2 by MEM
+;
+; This is verified to be identical to the original Microsoft implementation where it was named FDIVF.
+;
+; Input:
+; - .A - address low byte
+; - .Y - address high byte
+;
+; See also:
+; - [CM64] Computes Mapping the Commodore 64 - page 114
+; - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
+; - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
+;
+
+div_FAC2_MEM:
+
+        stx	ARISGN
+	    jsr mov_MEM_FAC1
+	    jmp div_FAC2_FAC1

tools/similarity.c

@@ -27,7 +27,7 @@ unsigned short microsoft_basic_chunks[NUM_CHUNKS * 2] = {
     0xB3A2, 0xB3A5,
     0xB849, 0xB97D,
     0xB983, 0xB9BB,
-    0xBA28, 0xBB06,
+    0xBA28, 0xBB0E,
     0xBB8F, 0xBCF2,
 };