CASH

Here many people are interested in what cache is for the Spectrum. Here you get it :)
Cache is a static RAM (573RU10 or RU17), which replaces the ROM when reading from
port #FB (251) and is disabled when reading from port #7B (123). If anyone needs
the diagram, I'll throw it in the echo.

$$$ With best wishes ... Alex

Thu 10:09 26 March 1998 Alex Gofman writes to All:

AG> Here many are interested in what cache is for the Spectrum. Here
AG> you will get :) Cache is a static RAM (573RU10 or RU17), which
AG> replaces the ROM when reading from port #FB (251) and is disabled when
AG> reading from port #7B (123).

Hmm. What about conflict? #FB - printer port. The standard ROM-48 contains IN commands (#FB). For example, at the address #0F0C

And in machines with an LPrint-III interface, generally IN (#FB) replaces
the standard ROM with the LPrint-III ROM, IN (#7B) disables the LPrint-III ROM and turns on
the standard ROM.

By the way, not from LPrint-III are the legs of this cache growing?-)

Best wishes! Michael KLUG

With the quiet rustling of the HDD Thu March 26 1998 10:09, Alex Gofman typed for All:

> Here many are interested in what cache is for the Spectrum. Here you get it :)
> Cache is static RAM (573RU10 or RU17), which replaces ROM when reading
> from port #FB (251) and is disabled when reading from port #7B (123). If anyone

Thu Mar 26 1998, Michael Markowsky writes to Alex Gofman:

MM> Hmm. What about conflict? #FB - printer port. The standard ROM-48
MM> contains IN commands (#FB). For example, at the address #0F0C

MM> And in machines with an LPrint-III interface, generally IN (#FB) replaces
MM> standard ROM with LPrint-III ROM, IN (#7B) disables LPrint-III ROM and
MM> enables
MM> standard ROM.

MM> By the way, aren’t the legs of this cache growing from LPrint-III?-)

Everything is correct. You have to have one thing - either LPrinter-III or cache. At
The Pentagon there is a panel for RF2 in which the printer driver is hardwired and everything happens
as you described above, but many people don’t use it - that’s where they put the RUSHKI,
preliminarily resoldering a couple of wires. I can’t say anything more about the Pentagon because... I have Leningrad-1, but it’s almost as easy to attach a cache to it as to the
Pentagon :) in general, it can be attached to any computer.

Thu Mar 26 1998, Alex Petrovskii writes to Alex Gofman:

AP> And what _specifically_ is the winning? Is it worth fencing the garden? Give me the schematic!

^^^^^^^^^^^^^^^^^^^^^^^^^^^
And ask the authors :) The benefit is that the programs work faster in the lower
memory, you can write there a copy of the ROM with changed constants or a monitor
for hacking the program - who likes what? Now there are programs that use this cache, but
you need to look for them from the owners of the Pentagons, because The cache came from them (at the Pentagon
you need a minimum of modifications to install the cache - insert the RUSHK into the socket and
solder a couple of wires). In my opinion, it’s worth installing such a thing on your computer -
it’s better to have everything that is supported by coders to enjoy their creations :)
The diagram will come a little later.

Once upon a time, specifically Thursday March 26, 1998 at 10:09 AM Alex Gofman
wrote All:

AG> Here many are interested in what cache is for the Spectrum. Here you will get
AG> :) Cache is a static RAM (573RU10 or RU17), which replaces the ROM when
AG> is read from port #FB (251) and is disabled when read from port #7B (123).
AG> If anyone needs a circuit, I’ll throw it in the echo.

Why is it needed for Spectrum and what software is it supported?

With respect, Tim. tyu...@usa.net [team Aries is Rulez Forever]

>> get :) Cache is a static RAM (573RU10 or RU17), which
>> replaces the ROM when reading from port #FB (251) and is disabled when
>> reading from port #7B (123). If anyone needs a diagram, I’ll throw it in
>> echo.

AP> And what _specifically_ is the gain? Is it worth fencing the garden? And the circuit
AP> come on!

16Kb of RAM in the address space of the processor,
IMHO it’s not even bad.
Sincerely
┬ ┬┌┐┬┐ ┐┬┬
╨╜╨╙╜╨╙ ╨ ╨

VY> 16Kb of RAM in the processor address space,
VY> IMHO it’s not even bad.
By the way, maybe you can make support in the emulator?

VY> With
VY> respect
VY> ┬ ┬┌┐┬┐ ┐┬┬
VY> ╨╜╨╙╜╨╙ ╨ ╨

Wiz zE BeSt WisHeZ 2 U!
-=JoCkeR/OmEga HaCkErS Grp/1998year=-

Thursday March 26 1998 10:09, Alex Gofman for some reason wrote All:

AG> Here many are interested in what cache is for the Spectrum. Here you get
AG> :) Cache is a static RAM (573RU10 or RU17), which replaces the ROM when
AG> reading from port #FB (251) and is disabled when reading from port #7B (123).
AG> If anyone needs the circuit, I’ll throw it in the echo.
And how is this compatible with SD ?
Can you post the schematic?;)

Sincerely, Konstantin.

AH> By the way, can you make support in the emulator?

No problem.
Best regards
┬ ┬┌┐┬┐ ┐┬┬
╨╜╨╙╜╨╙ ╨ ╨

Mon Mar 30 1998, Konstantin Samoylov writes to Alex Gofman:

KS> How is this compatible with SD?
KS> You can upload the schematic.;)

It seems compatible with SD, because There is only one cache on the Spectrum and it is addressed as I
described.
I threw out the diagram, if anyone did not receive it or did not understand it, write with soap.

Thu Mar 26 1998, Tarasov Oleg wrote All:

>> Here many are interested in what cache is for the Spectrum. Here you get it :)
>> Cache is static RAM (573RU10 or RU17), which replaces ROM when reading
>> from port #FB (251) and is disabled when reading from port #7B (123). If anyone
>> needs a diagram, I'll throw it in the echo. $$$ With best wishes... Alex

TO> Hello!
TO> It wouldn’t be bad to look at this device...;+)

Yes, it’s definitely not bad to look at, but you also need to listen.
This raised a couple of questions:
-is it like cache on a PC or just additional RAM?
-if it’s like on a PC, then maybe someone can throw in TR-DOS, which works with this cache

And also in A radio amateur once wrote about a new version of TR-Dos that uses
memory greater than 128k as a cache and for storing residents. Maybe someone has this miracle?
Happy!
MEN IN BLACK.

> >> Here many people are interested in what cache is for the Spectrum. Here you get it :)
> >> Cache is static RAM (573RU10 or RU17), which replaces ROM when reading
> >> from port #FB (251) and is disabled when reading from port #7B (123). If anyone
> >> needs a diagram, I'll throw it in the echo. $$$ With best wishes ... Alex
>
> TO> Hello!
> TO> It would be nice to have a look at this device...;+)
>
>Yes, it’s definitely not bad to look at, but it’s also necessary to listen.
>This raised a couple of questions:
> -is it cache like on a PC or just additional RAM?

I already threw out the diagram - if you write anything, write with soap

RR> Yes, it’s definitely not bad to look at, but you also need to listen.
RR> A couple of questions arose for this:
RR> - is the cache like on a PC or just additional RAM?

No, it’s not like on a PC - it’s extra. memory instead of ROM

RR> And in Radio Amateur they once wrote about a new version of TR-Dos which
RR> uses memory less than 128k as a cache and for storing residents. Maybe someone
RR> has this miracle? Happy!

Dear, look for such a thing - you want to see it :)