Once again about DMA chips
ZXNet echo conference «real.speccy»
From Kirill Frolov → To All 26 January 2000
25 Jan 00 22:12, Andreas Kaiser wrote to All:
AK> So, here is the pinout of TM9 and “that” in the diagram:
AK> TM9
AK> D0...D5 - 3,4,6,11,13,14
AK> Q0...Q5 - 2,5,7,10,12,15
AK> C - 9
AK> R - 1
AK> What is on the diagram
AK> D0...D5 - 3,4,7,8,13,14
AK> Q0...Q5 - 2,5,6,9,12,13
AK> C -1
AK> R - 11
AK> Tell me, am I fucking in the eye?
Just like that right away. On the diagram _HE_ _TM9_! And what I myself didn’t understand.
>> :-/ Look at the ANALOGICAL 8-bit channels
>> on IR23.
AK> Well, finally, these cool harders and coders have already bullied me, by God!
Or maybe there is IR33? :-/ Only it is 20-pin.
AK> And you wanted an ISA connector! What would it be without snot.
What for this ISA? Stick ?
AK> into the pussy by Europeans. The European form is what you use. But
AK> for some reason everyone prefers the American one.
And then these Americans cannot convert their pounds into kilometers and
their satellites are falling...
>> Set it up as indicated in the diagram, i.e. under 572PA1 and everything will be
>> a bunch.
AK> As long as it’s not sticking up in one place.
With 572PA1 it’s clear - you can turn them on differently.
>> blocking capacitors on the +5V bus and LC filters (one in each
>> arm for all loads) in each arm(+/-12V) power supply to operational
>> amplifiers and DACs.
AK> Firstly, the board will then be elephant-sized. Secondly, there
There will be no.
AK> there are two “grounds” - analog and digital. Tell me how
AK> to separate two grounds and power supply on two layers?
Is it possible in Russian?
AK> Thirdly, hang the capacitors and so on.
Usually it happens the other way around.
AK> And as for the analog ground - as I already wrote, stick a
AK> rail into the ground in your garden and attach the Speccy to it.
:-)
... no day without speccy!
From Andreas Kaiser → To All 27 January 2000
Well, where did you come from? Lair is a layer of the board. Usually diluted in two layers - top and bottom. In theory, they are now making multilayer boards, i.e. from a larger
number of layers and food layers are separated separately.
From Felix Knajzev → To All 27 January 2000
Who has it? ;)
>>AK> I will explore it as it is.
>>Why not try to find those rare owners of
>>collected and
AK> working
>>subject and ask about their glitches
AK> So we have already found each other. It was from such people that the request
AK> was made to install the IS connector
AK>.
That’s wonderful. And what about the issue with TM9?
AK> And you, cool
AK> hardders with 60 W
AK> soldering irons, will catch the glitches, and we, bourgeois lamers, will only design the circuit for
AK> thanks.
AK> This DMA Sound didn’t stick with me anywhere and I don’t intend to install it anywhere
AK>. You
AK> don’t want to help you, but you still open your mouths. Truly, they do not seek good from good
AK>.
Listen, “Mother Teresa” :), forget about everything, eh? And everyone will immediately stop opening their mouths. :)
*Mine* IMHO about the future DMA-SAUND in the presence of a 100% error free printed circuit board:
1. The default requirement is 512Kb of RAM. For some this will be a serious
obstacle.
2. Speck with a connected DMA-SND will no longer be able to boast of glitch-free operation. Just an awesome load on the processor buses.
(maybe the authors have already finalized the circuit?)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
At least only this onepoint, +the upcoming wild knife fight in my
Spekk, kept me from assembling the DMA even
without a finished printed circuit board.
3. Components: 580VI53 will have to be chosen “from the heap” to find a bug-free
working copy. (trifle) There are faster analogues, I know.
4. If a printed circuit board ever appears in St. Petersburg, which
I highly doubt (I’m keeping quiet about its price for now), then there will be
no one to fill it with parts, because All the "cool harders" are being blamed on offtopic topics, and new
replenishment of "fresh" forces is not expected, IMHO. :(
From Andreas Kaiser → To All 28 January 2000
>4. If a printed circuit board ever appears in St. Petersburg, which I highly doubt (I’m keeping quiet about its price for now), then there will be no one to fill it with parts, because... all the “cool harders” are being blamed on offtopic topics, and new
replenishment of “fresh” forces is not expected, IMHO. :(
From Kirill Frolov → To All 28 January 2000
AK> Usually this is immediately provided for in the circuit, along with the denomination and
AK> quantity.
All the same, people will not solder them and will say that the circuit is buggy.
From Kirill Frolov → To All 28 January 2000
27 Jan 00 16:10, Felix Knajzev wrote to Andreas Kaiser:
FK> Under what ISA? The physical embodiment of a detachable connection?
FK> Have you received the results of the “survey” in HARDWARE.ZX?
FK> I would like to hope that the pin assignment will be ZX-BUS.
Yes, you can’t connect anything through this ZX-BUS, especially through
Zonov’s miracle tree.
FK> *Mine* IMHO about the future DMA-SOUND with 100% error free
FK> printed circuit board:
FK> 1. Default requirement for 512Kb RAM. For some this will be a serious
FK> obstacle.
FK> 2. Speck with a connected DMA-SND will no longer be able to boast
FK> of bug-free operation. Just an awesome load on the processor buses.
FK> (maybe the authors have already finalized the circuit?)
FK> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FK> At least, only this item, +upcoming a wild knife fight in
FK> my Speck kept me from assembling the DMA even without a ready-made printed
FK> board.
FK> 3. Components: 580VI53 will have to be chosen “from the heap” to find
FK> a glitch-free working copy. (trifle) There are faster analogues,
FK> I know.
FK> 4. If a printed circuit board ever appears in St. Petersburg, which
FK> I strongly doubt (I’m not talking about its price for now), then stuffing it
FK> with parts will beThere is no one, because... all the “cool harders” blame it on
FK> offtopic, and a new replenishment of “fresh” forces is not expected, IMHO. :(
5. And of those reading this, ~1% of people will be able to make an echo into a board.
And the price of the device will exceed the price of General Sound, which
now costs $10 (before the crisis, XTR cost that much).
FK> *only* for it, output it (analog ground) to a separate
FK> lamella/lamellas of the connector, indicate in the documentation for the printed circuit board
FK> presence of analog ground on the connector.
And then you will need a case ground and “battery” ( (C) SU.HARDW.CHAINIK)
where and how the spectra are connected, you can guess?
From Mihail Tihonov → To All 30 January 2000
Gentlemen!!! Stop!!! Are you talking about THIS circuit???
║
║ DD27
║D0 3┌──┬──┬──┐2
║──────┤D0│RG│Q0├────
║D1 4│ │ │ │5
║──────┤D1│ │Q1├────
║D2 6│ │ │ │7
║──────┤D2│ │Q2├────
║D3 11│ │ │ │10
║──────┤D3│ │Q3├────
║D4 13│ │ │ │12
║──────┤D4│ │Q4├────
║D5 14│ │ │ │15
║──────┤D5│ │Q5├────
║csv3 9├──┤ ├──┤1
║──────/C │ │RSO─┐
║res └──┴──┴──┘ │
║─────────────────┘
║
This is the same microcircuit... THIS IS TM9, and nothing else...
And if I missed something, have pity on the fool, explain, don’t scold me, because on
the table lies an almost assembled one according to the scheme from Adventurer9...
Sleeper from Dream House Makers
From Felix Knajzev → To All 30 January 2000
AK> What sources are you talking about? Do you follow the
AK> topic at all? We were talking about the
AK> line designation and the fact that in Russia there is a
AK> standard for such things.
AK> Otherwise, all the factory diagrams would have been drawn haphazardly.
Calm down about the standards. I grew up with Russian technical reference literature and glitchy literature. Have you ever even seen it?
But that wasn’t what we were talking about at all: on the diagram there were obvious mistakes for
a couple of conclusions of the _obvious_ MS, which _you_ were misled.
[about the beam]
AK> I don’t know, probably yours. After all, I _already_ plugged it into the wrong
AK> connector.
DMA is becoming more and more popular...
[about Mother Teresa]
AK> No, I am Holy Father Johannes II. Enough with everything already.
I have gaps in my knowledge about the Catholic Church. :( He distributed free bread to the suffering, and then grumbled that no one said “thank you” to him?
AK> Sometimes the hammering hurts. It’s annoying that here everyone teaches each other
AK> instead of helping.
What is the difference between the concept of “teaching” (in the best sense of the word) from
"help"?
AK> Tell me, is this normal?
Depends on who and how it isпонимает.
From Roman Milukov → To All 30 January 2000
January 28, 2000, you wrote here:
KF> 5. And of those reading this, ~1% of people will be able to make an echo into a board.
KF> And the price of the device will exceed the price of General Sound, which
KF> now costs $10 (before the end, XTR cost that much).
^^^^^^^^^^^^^^^^
Is this true??
At this price many would buy from us.
Or are these second-hand ones changing hands from hand to hand?
All the best.
Roman.
[ZX]
From Andreas Kaiser → To All 31 January 2000
What's just right? And what examples are you referring to? The only way I know is from rumors, so to speak, that Igor Maznitsa discussed here the idea of building a new machine - they crap. Ivan Mak told you about his ideas with Forth-CPU and
other projects from Peters Plus - your return is 0, crap. Now I, naive
and romantic, asked you a couple of questions to find out what the modern user
is looking for. Most of the answers were on the topic, even Mr. Frolov expressed his valuable opinion, again on the topic, but the rest crap. Now I know that you don't need a damn thing. No need - I’m not dragging anyone by the ears. If you haven't slept again,
you read a message from Uttar that the first AZX scheme is ready. I’ve already written in short,
but for those sleeping I say again - I won’t pester you all anymore with “unnecessary” and “stupid” (worse, lame) questions. Forget about AZX, it doesn't exist for you. If you have any questions, please contact us.
(To Moderator-Team: I apologize for the personal correspondence, so to speak, and for
deviating from the echotag, but this cannot continue)
From Kirill Frolov → To All 1 February 2000
30 Jan 00 13:41, Roman Milukov wrote to Kirill Frolov:
RM> Is this true??
RM> At this price many would buy from us.
RM> Or are these second-hand ones changing hands from hand to hand?
I have something about 300 rubles. for GS they said it’s new, but there are only 128kb of brains,
and the expander probably costs $5..10 too. At least such microcircuits
as in the expander are sold for $5. Well, GS without an expander is not GS...
From Kirill Frolov → To All 1 February 2000
31 Jan 00 22:15, Andreas Kaiser wrote to All:
AK> I’m not dragging anyone by the ears. If you were awake again, then you read the message from
AK> Uttar that the first AZX scheme is ready. I’ve already written in short, but for those who are sleeping
AK> I say again - I won’t pester you all anymore with “unnecessary” and
AK> “stupid” (worse, lame) questions. Forget about AZX, for you
AK> it does not exist. If you have any questions, please contact us.
Well, when it’s drawn, then add the file with the PCAD diagram here.
AK> They tell you in RUSSIAN - we will release drawings of printed circuit boards with
AK> docks and a list of parts. Whoever wants it will collect it. All $$$$
AK> comes down to the cost of parts, most of which can be torn from the
AK> offtopic.
No. Everything $$$ depends only on the fee. Drilling and etching yourself
most likely will not work.
From Andreas Kaiser → To All 1 February 2000
There are at least a few problems here:
I breed using the German program Eagle (http://www.cadsoft.de).
The Light version is on their server. Therefore, PCAD is out of the question.
There are filters that port from Eagle to PCAD. And besides, PCAD is not the best
program. It is enough to take at least the Protel system - it allows you not only to make circuits and lay out boards, but also to simulate them. To do this, it requires
a lot of offtopic resources, so you can’t get there on a fucking goat.
Eagle, on the contrary, does not require a lot of resources (although the weaker the offtopic, the
slower it will distribute the boards), there is a version for Linux, but it has
one, in my opinion, serious drawback. It uses only symbols
of the ISO standard (which are Yankee) and does not use the newer DIN form (which
is all square and which is used in Russia).
I was going to pack this thing into jpeg and distribute it that way. This format
is readable by any system. However, you need to take “pictures” on a laser printer, because quality is important. On inkjet everything turns out blurry.
Now the question is for you personally - why do you need this? Herespecifically for you. You seemed to
say that this was stupidity.
From Kirill Frolov → To All 2 February 2000
01 Feb 00 23:43, Andreas Kaiser wrote to All:
AK> Russia). I was going to pack this thing into jpeg and distribute it like that. This format is readable by any system. However, what to do
And what to do with this jpeg? Then it might be easier to re-dissolve.
AK> Now the question is for you personally - why do you need this? Here it is specifically for you. You
AK> seemed to say that this was stupidity.
I most likely don’t need it. But there’s no need to answer like, since I
don’t need it, then I didn’t need to write a letter...
AK> to the West. I say this because somewhere on the Internet I read “reviews” about
AK> Russian microcircuits - “the cases are crap, but the build quality is not inferior to our
AK>.”
I don’t like these Russian microcircuits at all... Well, maybe only if
those that are all yellow...
From CoModerator of REAL.SPECCY → To All 2 February 2000
I've already got a flame (empty) under this subject.
If you want to argue about the case, please, and so...
And if you find irony in this echo, well, be patient, real people are deceived too often.
They promise, and then the standard excuse: “I see, this is of no use to anyone...”
Or else. They will trumpet everywhere how cool everything will be, and _definitely_ will be_, and then: “well
they promised, they promised, but we didn’t take the money up front!”
All the best.
Roman.
[ZX]
From Roman Milukov → To All 2 February 2000
01 February 2000 you wrote here:
AK>> “unnecessary” and “stupid” (worse, lame) questions. Forget
AK>> about AZX, it doesn’t exist for you. If you have any questions, please contact us.
KF> Well, when it’s drawn, then put the file with the PCAD diagram here
KF>.
Correct. We are waiting.
KF> No. Everything $$$ depends only on the fee. Drilling and etching yourself
KF> most likely won’t work.
You can order...
All the best.
Roman.
[ZX]
From Andreas Kaiser → To All 3 February 2000
I already explained. I use a different wiring harness. If I can get a filter for
PCAD, I will convert it to PCAD. The fact is that OrCAD (who have now bought the PCAD manufacturer) is not very friendly to freeloaders. All freeware they have is strictly subject to registration. Well, all the Tulas too. And it’s a waste of time for me to buy
some old PCAD that I don’t need just because of one diagram. That's why I want to make it in jpeg. I can do it in GIF or some other format. I can make it so that the drawing can be uploaded piece by piece into the original (in Speccy) and then
printed. But the quality will be lost. If there are any other
suggestions regarding drawings (except PCAD) - you are welcome. And moreover, I
I myself will not throw drawings into the echo, because I am sitting on the hated pussy and
I have the concept = 0 in the feed and everything else related to it.
From Nicolas Davidov → To All 4 February 2000
Seriously? :-[ ]. Have they really grown wiser? :) Pleases.
PS: (a little off topic) I was thinking, why is everyone so sure that the sound quality of the DMA is higher than that of the GS? The main thing is not the sampling frequency, but
interpolation! Which DMA completely lacks. You can, of course, try
assign this task to the main processor, but then the player will not
occupy those same announced 1000-9000 clock cycles, but much more.
Hence the conclusion: GS-rulez 4ever ;-).
[...]
For this Au Revoire, CompoWellcome. [Team GS]
From Kirill Frolov → To All 6 February 2000
04 Feb 00 14:38, Nicolas Davidov wrote to Kirill Frolov:
ND> Seriously? :-[ ]. Have they really grown wiser? :) Pleases.
350..400 rubles if sent by mail. I found out for sure. :-(
ND> PS: (a little off topic) I was thinking, why is everyone so sure that
ND> the sound quality of DMA is higher than that of GS? The main thing is not the sampling frequency
ND>, but interpolation!
Ha!...
ND> Which DMA is completely absent.
And GS? IMHO, they mostly caught up with this, for advertising...
ND> You can, of course, try to assign this task to the main
ND> processor, but then the player will not occupy those same
ND> declared 1000-9000 clock cycles, but much more.
Yeah, only then the output frequency will drop so much that no
interpolation will be needed...
ND> Hence the conclusion: GS-rulez 4ever ;-).
Rulez, but for a different reason - you can not only listen to music on it
, but also use it as an accelerator.
From Dmitry Lomov → To All 6 February 2000
KF> What about GS? IMHO, for the most part, they caught up with this, for advertising...
You're wrong. interpolation is indeed very effective, and it is very audible. another thing is that in the GS it is generally impossible without it, since the
sampling frequency is fixed.
All the best.
Dmitry.
... LD..X-TRADE... [ZX]
From Musa Khaybullin → To All 6 February 2000
Somehow Tuesday 4 Feb 2000 at 02:58:12 there was a conflict
Kirill Frolov and Musa Khaybullin were arguing on the topic Once again about DMA chips
I decided to add heat to this dialogue
MK>> Such as the built-in DAC? And then they made a bunch of reproducing
MK>> devices, but there are no recording devices except for the tape recorder ;( And then
MK>> the quality of one bit is crap ;)
KF> DAC and everything else, this only increases the cost.
KF> In fact, of course, it was not difficult to provide for the installation
KF> of an additional board with filters/ADC, but now this no,
KF> and there won’t be, transferring the board also costs money, but there is no return
KF>, no one is buying GS. This is what I understand, I have nothing to do with GS
KF> myself, there is no need to call me bad words
KF>...
But what about the General Sound - 2 project?
Long life and prosperity to you, Kirill!
With best wishes, Musa Khaybullin.
From Kirill Frolov → To All 7 February 2000
DL> you're wrong. interpolation is really very effective, and it
DL> is very audible. Another thing is that in the GS you can’t do without it at all,
DL> since the sampling frequency is fixed.
But in the Amiga it changes for each channel?
What about resampling with a higher frequency, probably the percentage doesn’t
allow?
From Kirill Frolov → To All 7 February 2000
KF>> and it won’t, transferring the board also costs money, but there is no return
KF>>, no one is buying GS. This is my understanding, I myself have nothing to do with GS
KF>>, there is no need to call me bad words
KF>>...
From Dmitry Lomov → To All 7 February 2000
DL>> you can hear it very well. Another thing is that in the GS without it,
DL>> is not possible at all, since the sampling frequency is fixed.
KF> And in the Amiga it changes for each channel?
no. As far as I know, the Amiga sucks in bytes every screen line, and then
some bytes are repeated twice (or thrown out). ask the Amizhniks :)
KF> What about resampling with a higher frequency, perhaps the percentage
KF> does not allow?
linear interpolation - sax. That's all the Z80@12MHz can do. well at least he is capable of this, thanks to Uncle Stinger ;)
From Kirill Frolov → To All 8 February 2000
KF>> percent does not allow?
DL> linear interpolation - sax. this is all that the Z80@12MHz is capable of.
DL> well at least it’s capable of this, thanks to Uncle Stinger ;)
Everything is clear - in the trash. :-(