I wonder if the "pseudo 48K" mode is 128k or not?

Hello Andrey Mihaylow! In a message of 14 Jul 97 Andrey Mihaylow wrote to me:

AM>>> Wait, I didn’t understand “pseudo 48 mode” is when ROM 48 BASIC is enabled,
AM>>> and OUT #7FFD,#30 is not done yet
AM>>> and that this mode is not 128K
AM> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ????
AM>>>, it is no longer 128K but not 48K yet?
AM>> 2ALL;_SMELLS_MYSTICAL_
AL>> It’s simple: it’s possible to silken pages, but it won’t sit in the printer buffer
AL>> a nasty page resident, and you can accidentally send interrupts to the ROM by
AL>> having previously filled the printer buffer. SOS 48, and open port #7FFD, this
AL>> is pseudo 48!
AM> And that it is not 128K mode? Well, you surprise me, but maybe
AM> maybe I’m behind the times :(
AM> 2ALL: then enlighten me, I just always thought that: “128K mode -
AM> is a mode
AM> in which 128K RAM is available for storing,”
AM> correct me if I’m wrong!

I wrote that the pages are _open_ for use, since the latch bit has not
changed, but the ROM is connected to 48!!! You go into BASIC 128, and
make USR 0 there, and you will find yourself in this magical mode!!! works!
You can test any128 launch the game, and it will work, since very rarely
memory is checked by ROM.

Sincerely, Alex from FFC COMPUTERS.