TURBO or not TURBO?!

SUBZH!!!

I have pent512 I want to listen to MODs, I made a turbo according to the VMG scheme (it turned out to be working)
there used to be such speeds (even-odd commands (maybe vice versa)) according to
RamDoctor's test: 71680-71684
after turbocharging: 88xxx-940xx
why is this so not enough??? and how to do more? it is said that it should be at least 155%, but it turns out that I have 133.3%, I tried the air conditioner as said,
no results, then I tore the track and ran it through a resistor -
the speed increased by about 100-200 cycles and that’s it!
Is this really the limit?
Maybe due to the fact that I used TM2 555 series?
Help please!

Eugene

TEV> I have pent512 I want to listen to MODs, I made a turbo according to the VMG scheme (it turned out
TEV> working) before there were such speeds (even-odd commands (maybe
TEV> vice versa)) according to the RamDoctor test: 71680-71684
TEV> after turbocharge: 88xxx-940xx
TEV> why so little??? and how to do more? It is said that it should not be
TEV> less than 155%, but it turns out that I have 133.3%, I tried the air conditioner as said,

Probably the limit. After all, memory speed has not increased. By the way, is the
WAIT signal generated with this circuit?

TEV> no results, then I broke the track and sent it through a resistor -
TEV> the speed increased by approximately 100-200 cycles and that’s it!
TEV> is this really the limit?
TEV> Maybe because TM2 555 series was used?

Of course 1533 is faster, but imho, don't care.

Sincerely, Alex from FFC COMPUTERS.

>e-mail: as...@usa.net

A bottle of papyrus floated to me, and on that papyrus it said that Tuesday
February 17 1998 at 03:20, Tyukaev Eugene Vladimirovich wrote All:

TV> I have pent512 I want to listen to MODs, I made a turbo according to the VMG scheme (it turned out
^^^^^^^^^^^^ I have the one.
TV> working) there used to be such speeds (even-odd commands (maybe
TV> vice versa)) according to the RamDoctor test: 71680-71684 after
TV> turbocharged: 88xxx-940xx why so little??? and how to do more?
I have 102xxx
TV> 555 series used? Help please!
Perhaps it’s a series, I had it before, but with turbo the screen decomposed.
Then I replaced it with 1533, now everything works great. And finally try changing the percentage, maybe it will help.

With maximum respect, Andy Harchenko.

> Hello Tyukaev Eugene Vladimirovich! In a message of 17 Feb 98 Tyukaev Eugene Vladimirovich wrote to All:
>
> TEV> I have pent512 I want to listen to MODs, I made a turbo according to the VMG scheme (it turned out
> TEV> working) before there were such speeds (even-odd commands (maybe
> TEV> vice versa)) according to the RamDoctor test: 71680-71684
> TEV> after turbo:88xxx-940xx
> TEV> why so little??? and how to do more? It is said that there should be no
> TEV> less than 155%, but it turns out that I have 133.3%, I tried the air conditioner as stated,
> Probably the limit. After all, memory speed has not increased. By the way, is the
> WAIT signal generated with this scheme?

>> TEV> why so little??? and how to do more? It is said that it should not be
>> TEV> less than 155%, but it turns out that I have 133.3%, I tried the air conditioner as stated
>>, Probably the limit. After all, memory speed has not increased. By the way,
>> signal
>> WAIT is generated with this scheme?

AL> Of course 1533 is faster, but imho, I don’t care.

531 is faster anyway :)

Good Luck...

... Gravity isn't MY fault! I voted for VELCRO!

MR> 531 is still faster :)
But it doesn’t work everywhere! ;-)

Best regards SP/PoS/PCCC.

Please note, Alex from FFC COMPUTERS

KS> Hò she not everywhere pabotaet! ;-)

1554i didn't hilo either.

Good Luck...

... "[NR]"? Shame on you!

AL> Yes, but she eats immeasurably.

so it’s impossible to do something so fast and small.

Good Luck...

... Pentium: 1 + 1 = 1.9999999999999999999998217368762

TV> “maybe” doesn’t work, it’s still a percentage! after all, 40 legs!
TV> but in general, in fact, the z80H should not be stupid :)

40 legs, this is of course good. But processors from different companies produce different signal timing diagrams. As a result, some circuits are “not indifferent” to the type of processor...
Tested in a real circuit.

Sincerely, George

AH> Perhaps the series, I used to have it, but with turbo
AH> the screen was decomposing.
AH> Then I replaced it with 1533, now everything works great.
Well, IMHO, it doesn’t affect the speed. It either works or it doesn't. Speed
depends on the circuit design.

AH> And finally try changing the percentage
AH> it might help.
But this is the right advice. From my experience, on a sophisticated Spec, with turbo, etc. Z8400A _GOLDSTAR_ work best.
Although the speed will not increase, it will simply work very steadily.

All the best.
With respect, Roman Milukov.

MR> so it’s impossible to do something fast and small.

It’s just that on most Russian-made Spectrums there is an eternal problem with
the power of power supplies.

MR> 1554 is also pretty good.
I haven’t tried installing such devices on my computer yet.

Sincerely, SP/PoS/PCCC.

AL>
AL> Well, that means a snag in reducing productivity from 155% to
AL> 133% in
AL> it. You can try to make the circuit work more
AL> synchronously (I don’t
AL> imagine how), that is, technically cut it off. :-))))
It will be difficult in the Pentagon without it :)
there is generally an interesting turbocharger, the processor must, at its 7 MHz
have time to jump to memory between samples of the video processor.
I don’t remember exactly the details, but it’s literally there - will the processor
have time to digest the command and steal one more byte from the guns, or while
he is thinking, he will run into wait... in general, the circuit is extremely unstable. Although
there was an idea, instead of wait, to slow down the percentage at a high level in terms of clock frequency, but I haven’t checked it myself yet.
By the way, I have just 155% in the turbo, percent Z80H, and due to the fact
that the processor sits on the handles a little longer, The video processor
sometimes skips sampling data for the screen. It looks like flickering across the entire screen in a tube. Unfortunately, it is observed
in all Pentagons with 155% productivity in the turbo, and not observed - with
133% output. :(

With the best, Denis.

TE> In my opinion, I don’t care either :)
Have you tried to poke someone else? it usually helps
if he is faster (but not always if logic = 155 ;)))

With best wishes, Denis.

DD> It will be difficult in the Pentagon without it :) there is generally an interesting turbocharger,
DD> the percentage must, at its 7 MHz, have time to jump to memory between samples
DD> of the video processor. I don’t remember exactly the details, but literally - will
DD> the processor
DD> have time to digest the command and steal another byte from the hands, or while
DD> it will think, it will run into wait... in general, the scheme is extremely unstable.
DD> Although,
DD> there was an idea instead of wait, to slow down the processor
DD> at a high level in terms of clock frequency, but I haven’t checked it myself yet.

This probably won’t have any effect. It seems that in branded Spectrums, wait was not
used, there the clock frequency was locked.

DD> By the way, I have just 155% in the turbo, percent Z80H, and due to the fact that
DD> the processor sits on the handles a little longer, the video processor
DD> sometimes skips sampling data for the screen. it looks like
DD> flickering all over the screen in the tube. Unfortunately, it is observed in all
DD> Pentagons with 155% productivity in the turbo, and is not observed - with
DD> 133% output. :(

Well, if there are glitches on the screen, then why such a turbo? It’s better then let it be 133%.

KS> I haven’t tried installing such gadgets on my computer yet.

It’s better not to try - it’s in short supply and expensive.

Good Luck...

... Help! I'm modeming... and I can't hang up!!!

> Great, Tyukaev!
>
> > TEV> I have pent512 I want to listen to MODs, I made a turbo according to the scheme
> > VMG (it turned out
> > TEV> working) there used to be such speeds (even-odd
> [ skipped ]
>
> > Of course 1533 is faster, but imho, I don’t care.
> TE> in my opinion don't care either :)
> Haven't you tried to poke someone else? it usually helps
> if it is faster (but not always if logic = 155 ;)))

>
> Hallo Tyukaev!
>
> Thursday February 19, 1998 12:05, Tyukaev Eugene Vladimirovich wrote to All:
>
> >> Then I replaced it with 1533, now everything works with a bang. And finally try the percentage
> >> changing it might help.
>
> TV> “maybe” doesn’t work, it’s still a percentage! after all, 40 legs!
> TV> but in general, in fact, the z80H should not be stupid :)
> 40 legs, this is of course good. But different companies issue different processors

> Great, Alex!
>
> >> By the way,
> >> signal
> >> Is WAIT generated with this scheme?
> TEV> yes, but what can you do something with it? :)
> AL>
> AL> Well, that means a snag in reducing productivity from 155% to
> AL> 133% in
> AL> it. You can try to make the circuit work more
> AL> synchronously (I don’t
> AL> imagine how), that is, technically cut it off. :-))))