[VA] SRC #015 - HP-15C & clones: Big NxN Matrix Inverse & Determinant

[Werner]

I saw this and promptly ordered a 15CE, which I wasn't planning to do ;-)
(I'd request a commission, Valentin)
It arrived 4 days ago, and I have been able to try out Valentin's routine, and get acquainted with the 15C's matrix functions and programming.
I have been able to shave off two lines and 4 bytes of his code, just realizing that the intermediate matrix E could be used throughout, no need for the STO MATRIX instructions:

27 lines, 29 bytes:

001 LBL E
002 RCL MATRIX A
003 RCL MATRIX B
004 RCL MATRIX C
005 RCL MATRIX A
006 RESULT A
007 1/x
008 RESULT E
009 x
010 RCL MATRIX B
011 RESULT D
012 MATRIX 6
013 1/x
014 RESULT C
015 x
016 RESULT B
017 x
018 CHS
019 RCL MATRIX E
020 RESULT A
021 MATRIX 6
022 RCL MATRIX D
023 RCL MATRIX E
024 RESULT C
025 x
026 CHS
027 RTN

Cheers, Werner