Hi,
Just one point to clarify. In the usergide, it's said as below:
MEALLOW and MEDIS only control CLA write access; reads are allowed even if
MEALLOW has not been executed. MEALLOW and MEDIS are also independent from
the main CPU's EALLOW/EDIS. This instruction does not modify the EALLOW bit in the
main CPU's status register. The MEALLOW bit in MSTF only controls access for the CLA
while the EALLOW bit in the ST1 register only controls access for the main CPU.
My doubt is: the access to protected registers for CLA and CPU is independent.
From timeline, first CPU EALLOW to access registers, then CLA MEDIS, after that CPU can still have the access to protected registers, as CPU doesn't call EDIS. Is that right?
I think so.
Thanks a lot.
Br, Jordan
