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                                            Vslav

VM3 mtpi in usermode not work.

Not sure the kernel space access should be allowed from user mode. F-11 factory tests of mtpd/mtpi instructions are done for "previous user mode" only. Would be interesting to test...

VM2 byte write without RMW

How "movb" works on original LSI-11: ![image](https://github.com/user-attachments/assets/e4d5e6e0-ac05-4544-a48d-04416f6b4341) How "movb" works on M4: ![image](https://github.com/user-attachments/assets/e6014a01-69ff-4689-b255-802bde67de99) How "movb" works on F-11: ![image](https://github.com/user-attachments/assets/e674dba9-a888-4a11-8085-1877ca70d11e) Why should we change this behavior ? It seems it was...