diff --git a/CREDITS.md b/CREDITS.md
index 7c8eb371..72143f5f 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -1,21 +1,13 @@
 
 # CREDITS to people whose work was of great help to us
 
-<br />
-
-## For source code we reused
-
-<br />
+## for source code we reused
 
 * TWW/CTR - for his keyboard handling code
 * Graham - for his PAL/NTSC detection routine
 * enthusi/Onslaught - for his example Turbo Tape 64 compatible loader
 
-<br />
-
-## For documentation
-
-<br />
+## for documentation
 
 * Frantic - for [Codebase 64](https://codebase64.org)
 * Joe Forster/STA - for the official/unofficial ROM API description at [sta.c64.org](http://sta.c64.org)
diff --git a/STATUS.md b/STATUS.md
index 69d469e1..53a24135 100644
--- a/STATUS.md
+++ b/STATUS.md
@@ -189,12 +189,12 @@ Floating point mathematical routines - not official, but well known and broadly
 | `$B7B5`   | `STRVAL`               | NOT DONE | imports string to FAC1                             |
 | `$B7F7`   | `convert_FAC1_to_ADDR` | NOT DONE |                                                    |
 | `$B849`   | `add_HALF_FAC1`        | NOT DONE |                                                    |
-| `$B850`   | `sub_MEM_FAC1`         | PARTIAL  | needs `add_FAC2_FAC1`                              |
-| `$B853`   | `sub_FAC2_FAC1`        | PARTIAL  | needs `add_FAC2_FAC1`                              |
+| `$B850`   | `sub_MEM_FAC1`         | DONE     |                                                    |
+| `$B853`   | `sub_FAC2_FAC1`        | DONE     |                                                    |
 | `$B862`   | `add_align_exponents`  | DONE     |                                                    |
-| `$B867`   | `add_MEM_FAC1`         | PARTIAL  | needs `add_FAC2_FAC1`                              |
-| `$B86A`   | `add_FAC2_FAC1`        | PARTIAL  | aubstration not tested yet                         |
-| `$B8FE`   | `normal_FAC1`          | PARTIAL  | not fully tested yet                               |
+| `$B867`   | `add_MEM_FAC1`         | DONE     |                                                    |
+| `$B86A`   | `add_FAC2_FAC1`        | DONE     |                                                    |
+| `$B8FE`   | `normal_FAC1`          | DONE     |                                                    |
 | `$B947`   | `inv_FAC1_mantissa`    | NOT DONE |                                                    |
 | `$B983`   | `MULSHF`               | NOT DONE |                                                    |
 | `$B9EA`   | `log_FAC1`             | NOT DONE |                                                    |
diff --git a/bin/basic_generic.rom b/bin/basic_generic.rom
index a6b3a27e..7db8844e 100644
Binary files a/bin/basic_generic.rom and b/bin/basic_generic.rom differ
diff --git a/bin/basic_testing.rom b/bin/basic_testing.rom
index 86f20e2b..04529177 100644
Binary files a/bin/basic_testing.rom and b/bin/basic_testing.rom differ
diff --git a/bin/basic_ultimate64.rom b/bin/basic_ultimate64.rom
index bd9dfcf4..98571e4e 100644
Binary files a/bin/basic_ultimate64.rom and b/bin/basic_ultimate64.rom differ
diff --git a/bin/kernal_generic.rom b/bin/kernal_generic.rom
index fe8a2281..6be4cf2b 100644
Binary files a/bin/kernal_generic.rom and b/bin/kernal_generic.rom differ
diff --git a/bin/kernal_testing.rom b/bin/kernal_testing.rom
index 7bd2be84..cee5e14c 100644
Binary files a/bin/kernal_testing.rom and b/bin/kernal_testing.rom differ
diff --git a/bin/kernal_ultimate64.rom b/bin/kernal_ultimate64.rom
index 8bb11f77..fc119cd3 100644
Binary files a/bin/kernal_ultimate64.rom and b/bin/kernal_ultimate64.rom differ
diff --git a/bin/mega65.rom b/bin/mega65.rom
index 7bb1ae23..d5cb3978 100644
Binary files a/bin/mega65.rom and b/bin/mega65.rom differ
diff --git a/c64/basic/math/ba28.mul_MEM_FAC1.s b/c64/basic/math/ba28.mul_MEM_FAC1.jmp.s
similarity index 100%
rename from c64/basic/math/ba28.mul_MEM_FAC1.s
rename to c64/basic/math/ba28.mul_MEM_FAC1.jmp.s