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There was nothing to do, and 28 Dec 98 at 06:26:44
Kirill Frolov wrote a letter for All
I saw this and decided to answer.

KF> What kind of subject is there in the Spectrum other than 16kb?

I wonder, on which memory chip(s) is this implemented?
I have 2kb on RU10.

For this, let me bow out. Sincerely, Andrey Khoroshilov.

··· The mind is stronger than the chest. Hippies are people too.
··· What were you going to see there? Glass fabric? And thought from electrons?

AK> I wonder what memory chip(s) this is implemented on?
AK> I have 2kb on RU10.

62256 one piece gives 32kb. Switching cans by 4 bit #7ffd.
Connected as standard, instead of ROM by in (#fb) and by in (#7b) is disabled.

With best wishes, Kirill Frolov.

KF> 62256 one piece gives 32kb. Switching of cans by 4
KF> bit #7ffd.
KF> Connected as standard, instead of ROM by in (#fb) and by in
KF> (#7b) is disabled.

Knowing your long-standing (however unrequited:) love for the Sprinter
I can report that there is a subj on 61512 (64k) and is available
as 16k according to the proposed method, and any of the four
quarters :) from address #c000 when outputting to the port the number of pages
in the general numbering assigned to the subj. :)

This is the version of the investigation. I said.

KF> 62256 one piece gives 32kb. Switching of cans by 4 bits #7ffd.
KF> Connected as standard, instead of ROM by in (#fb) and by in (#7b) is disabled.

Is there a schematic for the subject?
I would like to receive a more detailed description.