PENTAGON 1024 - disable 1MB

[VELESOFT]

Port #7FFD is not turn off! Set to zero only the lines of adresses A17'-A19'

OUT P1,32+16:POKE 49152,32+16 ;extra memory page (D5=1 !!!)
OUT P2,4 ;switch to 128kB mode (but D5 on 128 mode is used for block 7FFD)

I am in Pentagon 1024SL 2.2 in 128mode and set OUT 32765,48 then will set page ram 0 and disable port 7FFD. After switch to 1MB mode will active page ram 8. Anf after switch back to 128mode via OUT 61431,4 is also port disabled ?