Alternative HP-41CL mainframe (OS ROMs) update for beta test

[hth]

I made a new version and put it up on Google drive. Two corrections have been done since the first beta release and it has the same ROM identifiers IFG.

There is one change to XROM XKD handling to make it correct. If a RET was followed by NOP (like an empty area) it would be treated as XKD (execute direct on key down) instead of going through NULL test. This happened in run mode (not program mode). I reordered the code slightly to make it correct.

The other change is that the XROM IND ST bug which has been known for long is now corrected. If you have an XROM that takes a postfix argument and enter an IND STack operand (like CAT IND Y, if CAT was an XROM), the postfix byte would overwrite the second byte of the XROM, causing the wrong instruction to be executed (or NONEXISTENT).

As we did not have much things reported before I will just put up the links here for anyone to test. Consider it a release candidate.

https://drive.google.com/open?id=1EsPynx...x9d2hMVZz6

32-bit CRC codes:

Code:

NUTO      54d262cf
NUT1      baf1fc53
NUT2      2a14a14f
XFNS3     d750d0a5
XFNS5     ff4c5c2a
TIME      0af2caaf