Ram 512K - to be or not to be?

One day, Saturday June 06, 1998 12:04, Eugene Tyukaev wrote to Artur Ishmurzin:

AI>> until I have a broom on the speck - and I won’t think about working on it with
AI>> mail :)) unless forced..
ET> and what the broom? Isn’t it a screw by any chance?

he’s the one :)) and what are you cooing with mail on? :)). and not
ET> all programs use a cache and not everyone has this cache, so that the turbo is
ET> really turbo.

and even without the cache, the turbo speeds up the work quite well. rearranging
ET> floppy disks. And also about the residency: every time you are afraid, not
ET> there is a problem in the memory of the boot, and whether it will mess up with my disk
ET> something during disk operations...

it itself cannot fail only if some crooked program
gets into it. additional pages and will put things in order there :(

ET>>> something like this didn’t even take root with me, its interface
ET>>> is somehow unfriendly :(
AI>> IMHO, you need to get used to it. and so - the interface is thought out
AI>> thoroughly. I would like to convey a huge thank you to Andrey
AI>> Khonich. who could help with this
ET> maybe he reads?
ET> there are a lot of silent people here ;)

I wonder how many people are subscribed to this echo, including the “silent people”

Best wishes, Artur. [ZX]

AI> I wonder how many people are subscribed to this echo, including
AI> “silent people”

A long time ago I was collecting statistics, and then I gave up.
You can’t catch silent people... But it’s not interesting to collect people who write
- you can already see them ;)

[Team Kelly] [I ZX]
Hasta la vista.
Tim Kelly

... E-Mail: tim_...@mail.ru 500:622/1@zxnet ICQ UIN: 34684028

Once, Thursday June 11 1998 16:49, Eugene Tyukaev wrote to Artur Ishmurzin:

AI>> and even without a cache, turbo speeds up work quite well. but this is IMHO.
ET> Do you have a turbo?

Of course! Of course there is.

ET> on what computer?

Pentagon. and what?

ET> on my penta it seems like 133% with turbo, which is very little, but with
ET> using the cache...!

on my stump, I made turbo 147%, i.e. maximum possible normal
turbochargement. You can, of course, do 165%, but this will not be the same - the image on
the screen deteriorates, every familiar place begins to be duplicated, although the computer works
OK, and even quite quickly compared to 147%.

AI>> itself, it can’t fail. only if some thread is crooked
AI>> the program will climb into the additional pages and put its own order there. :
ET> there are a lot of such programs "crooked" :( and demos love to glitch the memory...

in 99% of all cases of incorrect operation of programs with additional memory that I
met, these programs simply killed the resident sitting in the memory without
fatal consequences.

ET>>> maybe he reads? There are a lot of silent people here ;)
AI>> I wonder how many people are subscribed to this echo, including
AI>> “silent people”
ET> you will never know, even with an error of ten.

easy to read, withoutexpressing your opinion on issues of interest is not
rules :))

One day, Friday June 11, 1999 21:23, Tim Kelly wrote to Artur Ishmurzin:

AI>> I wonder how many people are subscribed to this echo, including
AI>> “silent people”
TK> A long time ago I was collecting statistics, and then I gave up.
TK> You can’t catch silent people... But only It is not
TK> interesting to collect people who write - they are already visible ;)

you can turn to the consciousness of the silent ones. like:

People! Brothers! Comrades! Who reads this echo, but does not write to it for various
reasons, let the management know about yourself, please!

AI> on my stump, I made a turbo 147%, i.e. maximum possible
AI> normal
AI> turbocharging. You can, of course, do 165%, but it won’t be the same -
AI> the image on the
AI> screen deteriorates, each familiar place begins to be duplicated, although the computer
AI> works
AI> OK, and even quite fast compared to 147%.

But my Pentagon was turbocharged to 147%. There is a problem:
When you turn on the computer for a few seconds (if the turbo mode is turned on),
the glitch described above with the screen is observed (apparently the RAM does not have enough speed). Then everything returns to normal. However, the problems do not end there. I have a PC keyboard connected via a Scorpov controller, and in half of the programs, when I press any key, the above-mentioned glitch with the screen occurs. At the same time, nothing is spoiled in the RAM itself. My opinion:
the fault is with the Waited percent conflicting with the video controller. Question:
how to get rid of this? The turbo scheme is taken from the Review (1 multiplexer).

Sincerely, Dmitry.

AI> on my stump, I made turbo 147%, i.e. maximum possible
AI> normal
AI> turbo. you can, of course, make 165%, but it won’t be the same -
AI> the image on the
AI> screen gets spoiled, every familiar place starts to be duplicated, although the computer
AI> works
AI> OK, and even quite fast compared to 147%
Well, I can only raise mine to 155% and the screen will glitch, but everything
else will, of course, be faster and just as stable.

AI> in 99% of all cases of incorrect operation of programs with additional. memory with
AI> which I
AI> met, these programs simply killed the resident sitting in the memory without
AI> fatal
AI> consequences
it’s easier for the program (resident) to check itself for glitches :-)

[skip]
ET> Well, I can only raise mine to 155% and the screen will glitch, but everything
ET> the rest will of course be faster and just as stable.
Well, it depends on how you measure it, if you use the old zx_bench, then I have 155%, and Test 4.21
shows 147%

Well, bye! Tigrr... -■Brainwave / X-Project■-
--[GOA] [BREAKBEAT] [ARIA] [I ZX]--

In general, what program do you use to measure? And then some people show it differently.
According to ZxBench, I have 155%. For others, maybe less.
Joke about ZxBench: If you run it in 128 BASIC, it will show 155%.
Stop it, enter spectrum to switch to 48 BASIC. Let's launch - 153%
:)

Bye, Eugene! Don't sneeze!
Alexander aka Arc.

TK>> It’s been a while since I was collecting statistics, and then I gave up.
TK>> You can’t catch the silent ones... But it’s not interesting to collect people who write
TK>> it’s interesting - you can already see them ;)

AA> How many schemes are there in general? I saw three.

IMHO the best turbo design (I don’t know who the author is) for the Pentagon is the one
that was included in the second version of the “HD” revision from AXLR (they threw it here).
And it was taken from some album for the Pentagon, like, by Slot.
According to the ZX-BENCH test - 155% without glitches on the screen (without lengthening /IORQ).

AA> A joke about ZxBench: If you run it in 128 BASIC, it will show 155%.
AA> Stop it, enter spectrum to switch to 48 BASIC. Let's launch -
AA> 153% :)

Exactly, there is such a thing. It works through ROM.

ET>> glitches, but everything else will of course be faster and just
ET>> also stable.
IT> Well, it depends on what you measure, if I use the old zx_bench, then I have 155%, and
IT> Test 4.21 shows 147%
now I can’t run this test - the block flew, but I’m measuring zxbench
by the way, maybe you can draw a turbo diagram and send it?
I turbocharged via VVG(?)

IT> Well, bye! Tigrr... -■Brainwave / X-Project■---[GOA]

19:18:53 18-Jun-99 Always *yours* PointZ

AA> In general, what program do you use to measure? And then some people show it differently
AA>. According to ZxBench I have 155%. For others, maybe less. Funny
AA> about ZxBench: If you run it in 128 BASIC, it will show 155%.
AA> Stop it, enter spectrum to go to 48 BASIC.
AA> Run it - 153% :)
similar!
do you have Pent? and nothing glitches at 155%?

AA> Bye, Eugene! Don't sneeze! Alexander aka Arc.

22:30:53 18-Jun-99 Always *yours* PointZ

TK>> it’s not interesting to collect them - you can already see them ;)

AI> you can appeal to the consciousness of the silent ones. like:

AI> People! Brothers! Comrades! Who reads this echo, but does not write to it for
AI> various reasons, let the management know about yourself, plz!

Forget it. If they have never written, you won’t be able to shake them...

ET>> will glitch, but everything else will of course be faster and
ET>> just as stable.

percentages, by the way, very much depend on the chips on which the computer and
turbo are assembled. My computer is 95% assembled from m/s series 1533, and the turbo circuit too. what
I can notice is that the series plays a significant role in the turbo design - 555 and
531 differ by ~7%

One day, Thursday June 17, 1999 21:58, Dmitry Pavlukhin wrote to Artur Ishmurzin:

DP> But my Pentagon was turbocharged to 147%. there is a problem:
DP> When you turn on the computer within a few seconds (if the
DP> turbo mode is turned on), the glitch described above with the screen is observed (in general
...
skip

try to attach a 100-250 pF capacitor to the C21 signal.

One day, Friday June 18, 1999 16:28, Roman Milukov wrote to Artur Ishmurzin:
AI>> reasons, let the management know about yourself, plz!
RM> The management does not need it - whoever is silent does not violate. ;)

or maybe on the contrary - they violate :)). after all, echo was created for communication. imagine
all of a sudden everyone would switch to ReadOnly..... well, how? :)

One day, Friday June 18, 1999 07:18 pm, Igor Turashev wrote to Eugene Tyukaev:

ET>> Well, I can only raise mine to 155% and the screen will
ET>> glitch, but everything else will of course be faster and just as
ET>> stable.
IT> Well, it depends on what you measure, if you use the old zx_bench, then I have 155%, and Test
IT> 4.21 shows 147%

Personally, I consider Test 3.03, since versions 4.16 - 4.21 do not work for me :(,
but the calculation of percentages in both 3.03 and 4.21 is the same, as far as I am informed.

AA> In general, what program do you use to measure? And then some people show it differently
AA>. According to ZxBench I have 155%. For others, maybe less. A joke about
AA> ZxBench: If you run it in 128 BASIC, it will show
AA> 155%. We stop it, enter spectrum to go to 48 BASIC.

RM> IMHO the best turbo design (I don’t know who the author is) for the Pentagon is
which
RM> was included in the second version of the “HD” modification from AXLR (they threw it here).
RM> And it was taken from some album for the Pentagon, it seems, by Slot.
RM> According to the ZX-BENCH test - 155% without glitches on the screen (without extension /IORQ).

This is the same circuit I have assembled.
And what do they write under “HD” software? Otherwise, apart from the formatter (cool) and the c
MSDOS copier (crappy), I didn’t see anything else. I want to not only read
but
and write...

RM> Sincerely, Roman.
With a big “hello”, Alexander.

AA>> show. According to ZxBench I have 155%. For others, maybe less. Cool
ET> similar!
ET> do you have Pent? and nothing is buggy at 155%?
I have a Pent with a Russian analogue of the Z80 and so far nothing is buggy, except that for
unclear reasons my turbo reset only works on holidays...

Once, Tuesday June 22, 1999 21:27, Alexander Araktcheew wrote Roman
Milukov:

...
skip

AA> And what do they write under “HD” software? Otherwise, apart from the formatter (cool) and
AA> copier with MSDOS (crappy), I didn’t see anything else. I want
AA> not only to read, but also to write...

are you talking about the HD drive? Did I understand correctly? and how can you connect it to
use the entire capacity of the HD format (1.2M)?

AI> what is the third? the first is where tm2, kp11 and small things, changes on the board
AI> of the company
AI> are minimal. the second - two tm2 and small things, the changes are quite significant. and
AI> here
AI> what is the third?

And the third is a sophisticated second :)
It was in the second version of the VG-TURBO-HD scheme. Actually, I have collected it.

[skip-s]

AI> It seems that Test 4.21 is recognized as the test of today....

I willingly believe it, but I accidentally killed him...

AI> Best wishes, Artur. [ZX]
All the best, Alexander.

Sat 19 Jun 1999 you wrote here:

ET> I had turbocharged VVG(?)

V.M.G. From Online#2.

AI> are you talking about the HD drive? Did I understand correctly? and how to connect it,
About this very thing.

AI> to use the entire capacity of the HD format (1.2M)?
There is a diagram, and for quite a long time. A turbo mode is DEFINITELY needed.
And it supports more than 1.2M :)

Tue 22 Jun 1999 you wrote here:

AA> And what do they write under “HD” software? Otherwise, apart from the formatter (cool) and the c
AA> MSDOS copier (crappy), I didn’t see anything else. I want to not only
AA> read,
AA> but
AA> and write...

Exactly. :(
But AXLR has other things to do right now, he doesn’t want to finish the copier.

It’s possible, the diagram flew by here.
If the computer is already turbocharged, then the modification is not big (especially in the Pentagon ;).

[Team Kelly] [I ZX]
Hasta la vista.
Tim Kelly

... E-Mail: tim_...@mail.ru 500:622/1@zxnet ICQ UIN: 34684028

RM> Exactly. :(
RM> But AXLR has other things to do right now, he doesn’t want to finish the
RM> copier.

Maybe it will be completed later. Maybe immediately in the form of msdos.drv and fdd.drv under the OS.

Your Alexander.

AI>> on the computer board are minimal. the second - two TM2 and small things, the changes
AI>> are quite significant. but what is the third?
AA> And the third is a fancy second :)
AA> It was in the second version of the VG-TURBO-HD scheme. Actually, I have it
AA> assembled.

what is its use?

AK> Maybe it will be finished later. Maybe immediately in the form of msdos.drv and fdd.drv under the OS.

It’s not “later”, but urgently!
Yesterday they brought me the firmware for the modem on a floppy disk 1.44, and it’s there in the catalogs
and PG can’t get it from catalogs... :(

RM> It’s possible, the scheme flew here.
RM> If the computer is already turbocharged, then the modification is not big (especially in
RM> the Pentagon ;).

I fully admit that it flew. but when? If it’s earlier than April, then I won’t be able to find it :(and even if it’s later, it’s problematic. Maybe someone can help me, otherwise I haven’t added anything to my turbocharged Pentagon for a long time :)

AA> About this very thing.

wow, how quick-witted I am ;)))

AI>> to use the entire capacity of the HD format (1.2M)?
AA> There is a scheme, and for quite a long time. A turbo mode is DEFINITELY needed.
AA> And it supports more than 1.2M :)

There is a turbo, but there is no circuit. :(

AI>> connect to use the entire capacity of the HD format (1.2M)?
TK> They are talking about 1.44. There is a scheme. Ask the dresser.

Mazda has a 3.5 drive! Even on a PC with minimal use (3-5
records per week), floppy disks last a maximum of six months. and what will happen on Spec?
floppy disks, by the way, have nothing to do with it, the drives are to blame - here is the structure of the head
(pointed), and the fall of the heads onto the surface of the disk when it is “dislocated” :) into the
disk drive. IMHO, it's better to use 5.25 HD drives. They still seem to have disks.
the capacity is not much less than that of 3.5 HD, and the disks will last _much_ longer.
for example, my 5.25 DD (BASF, TDK, CRAMDS, GMD-130) have been working normally for
5-6 years, worse of course is any crap like IZOT and MiniDisk, but even they work
longer than 3.5 to the PC.

Fri 2 Jul 1999 at 07:45:00 pm, Artur Ishmurzin seems to have written to Tim Kelly:

AI> floppy disks, by the way, have nothing to do with it, the drives are to blame - here is the
AI> structure of the head
AI> (pointed), and the fall of the heads onto the surface of the disk when
AI> its “dislocation” :) in
AI> disk drive. IMHO, it's better to use 5.25 HD drives. disks on
AI> seem to still exist.
My disks are deteriorating in a strange way. Maybe someone can tell me the cause and method of elimination (5'25). Some sector is no longer readable. I format FUT'om without
checking for readability. Everything formats fine. No bad blocks. But after
recording it doesn’t read from that sector again. Not formatted with a readability check.

Hmm... Bye, Artur. [Nastenka] [I ZX]

AI> Mazda has a 3.5 drive! even on a PC with minimal use
AI> (3-5 records per week), floppy disks last a maximum of six months. and what will happen on
AI> Spec?

Absolutely agree.

AI> -+- GoldEdit of the version that suits Tim Kelly. UNREG
^ insert a comma, right? ;)

03 Jul 99 12:54, Kirill Maksarov wrote to Artur Ishmurzin:

KM> My disks are deteriorating in a strange way. Maybe someone can tell me the reason
KM> and a solution (5'25). Some sector is no longer readable.
KM> I am formatting FUT'om without checking for readability. Everything is fine
KM> formatting. No bad blocks. But after recording again from that sector
KM> does not read. It is not formatted with a readability check.

Everything is clear... It's time to throw away the drive (probably made in USSR?) and
install a more normal one.

Kirill Frolov. [ZX]

Once, Saturday July 03, 1999 12:54, Kirill Maksarov wrote Artur Ishmurzin:

AI>> floppy disks, by the way, have nothing to do with it, it’s the drives that are to blame - here is the structure
AI>> of the head (pointed), and the fall of the heads onto the surface of the disk when
AI>> its “dislocation” :) into the drive. IMHO, it is better to use 5.25 HD
AI>> drives. They still seem to have disks.

AI>> disk drive. IMHO, it's better to use 5.25 HD drives. disks on
AI>> seem to still exist.
KM> My disks are deteriorating in a strange way. Maybe someone can tell me the cause and
KM> solution (5'25). Some sector is no longer readable. I format
KM> FUT'om without checking for readability. Everything formats fine. Without bad
KM> blocks. But after recording, it doesn’t read from that sector again.
Are you sure that they don’t physically deteriorate? If you are sure, then check the voltage
12V on the VGshka... Change the VGshka itself. I have very similar symptoms,
but only in the case when the VG operates without cooling (I have a cooler
hanging above it).

Good luck! Evgeny.

■ The night is shorter than the day... The day will kill me... The world of illusions burns down in it. (C) Aria.

TK> ^ insert a comma, right? ;)

:) (blushing) excuse me please... there's something wrong with the grammar.... F:-)

AI>
AI> :) (blushing) please excuse me... the grammar is wrong.... F:-)

Quite on the topic of the conference...

AI> + Origin: Place for a plus: [ ] :( (2:5085/1.71)

That's it...