upper memory

I ask competent people to soap or throw in the echo brief information about the numbers
ports and the assignment of bits in them for switching upper memory pages in
machines known to you (KAY, Scorpion, Profi, ATM...). This is for the debugger.

Thanks in advance.

P.S.: Lamers and unsure people, please do not worry.

Sincerely, George aka -=GPV=-.

Once Tue 5 Sep 2000 at 09:57:37 George and All were arguing about the topic of upper memory

GV> I ask competent people to soap up or throw into the echo brief
GV> information about the numbers of
GV> ports and the assignment of bits in them for switching pages
GV> of the upper memory in
GV> machines known to you (KAY, Scorpion, Profi, ATM...). This is
GV> for the debugger.

======Scorpion 256

port #7ffd

nn0rspag 0-2 memory page 0-7
│└─── 3 active screen 0-#4000 1-#7c000
└──── 4 active ROM 0-rom128 1-rom48

port #1ffd

???h???s 0 during installation connects page 8
│ RAM instead of ROM, the ability to exit to DOS (!)
└──── 4 during installation connects the top 8 pages of RAM
I can’t describe the meaning of the remaining bits for a reason lack
of literature at the moment

▒▒▓▓▓ ▄▀█▀▀▀ ▓▓▓▒▒░░░ Sincerely yours, Yuri /I \
▒▓▓▓ ▐▌▀█▀ ▓▓▓▓▓▓▒▒▒░░░░ Jerri / Alien Factory \ZX/

09 Sep 00 11:57, Yuri Potapov wrote to George Valnin:

YP> ======Scorpion 256

YP> port #1ffd

YP> ???h???s 0 during installation connects page 8 instead of ROM

Have you tried? There is no way he can include it there,
the shadow service will die there. It turns on page zero
.

YP>> page

KF> Have you tried it? There is no way he can include it there
KF>,
KF> the shadow service will die there. It includes zero
KF> page down
KF>.

sorry, bugger. Yes, it’s true that bank 0 is connected

addition:
when bit 1 is set, the service monitor ROM is connected, that’s for sure! just checked
:)