connecting SIMM to Kompanion-1
ZXNet echo conference «hardware.zx»
Hello fan
fan, I should run it (SIMM) at least in 48kb mode...
Hello John North
Like that, the main thing is what and how it is multiplexed.
There is a suspicion that D46 generates CAS for pop microphones (such as RU5 D31-38, RU7
D21-28). It looks like you need to construct a design ala D45 (most likely this CAS
for Sim micros D29-30). S - sync signal for the monitor.
But if on your computer the attachments with temporary structures are somewhat plowed, then it’s easier
shoot yourself, although it is not yet known what changes have been made before
pushing into the matrix...
We need to simulate the Baltic diagram in some way, then everything will become clear and most likely
You can get by with just one wire ;)
Hello fan
fan> Like that, the main thing is what and how it is multiplexed.
fan> There is a suspicion that D46 generates CAS for pop microphones (such as RU5
fan> D31-38, RU7 D21-28). Looks like you need to construct a design ala D45
fan> (most likely this CAS is for Sim micros D29-30). S - sync signal
fan> for monitor .
fan>
fan> But if on your computer the attachments with temporary structures are somewhat plowed,
fan> it’s easier to shoot yourself, although it’s not yet known what changes
fan> are made before stuffing into the matrix...
fan>
fan> We need to simulate the Baltic diagram in some way, then everything will become clear and
fan> most likely you can get by with just one wire
Well, you killed me!
Hello fan
fan, is CAS multiprexed with +5V and with itself?!? sorry, I'm not very good at it
in circuit engineering.
Hello John North
What difference does it make - 48, 128, or 1 MB...
There are just more addresses - that's all.
Hello, Jukov
Juk> Show the diagram of how you connected it
here she is. All designations are according to the "Baltic" scheme.
File: simm-k-1-1_cr.jpg http://zx.pk.ru/attachment.php?attachmentid=4221
Hello, Mikka_A
Mik> I have 2-14 knobs not closed.
That's it. But mine are closed, therefore, IR22 is not needed.
fan> Looks like you need to construct a design ala D45
This is what happens (see attachment).
Question - what should I submit for the 3rd and 4th conclusions? in "ATAS" signals go here from
KP11, which seems to be from the “scheme” 128K.
File: d45-my.PNG http://zx.pk.ru/attachment.php?attachmentid=4222
Hello, Mikka_A
Mik> started only with a buffer.
So the buffer is needed to divide the SIMM data bus. and because data bus
RU5 is ALREADY united, then there is no need to separate anything...
Hello John North
Joh> fan, I should run it (SIMM) at least in 48kb mode...
But what if you try it like I did... stupidly.
buffer on ir22 (input to output output to input) clicking on /WE
output of handles on sim data
Handles addresses to Sim addresses.
and the Sim's senior addresses, as unnecessary, are set to zero....
and telemarket.... :v2_rolley
To be fair (about the circuit), with the exception that 2-14 of my switches are not closed.
this work is completed by ir22
Hello John North
Joh> that's it. And mine are closed, therefore, IR22 is not needed.
but in this version it didn’t start for me, even though they said it should.
It started only with a buffer.
Hello John North
Joh> this is what happens (see attachment).
Joh> question - what to apply to the 3rd and 4th pins? they come here to "ATAS"
Joh> signals from KP11, which is similar to the 128K “circuit”.
Only senior addressable brainbitters go there (who want
unmultiplex ;) ). In short, hit the ground on them.
Hello caro
car> Carefully check the wiring of the SIMM pins, it may be counted somewhere
yes, everything seems to be normal. except that some have been swapped
address contacts and SD. those. for example MA1 and MA3, MD2 and MD6, etc. but it seems like it
not critical. or am I wrong?
Hello fan
fan> who want to multiplex
:D
fan> In short, hit the ground on them
ok! I'll try.
Hello John North
Joh> so the buffer is needed in order to divide the SIMM data bus. and because
Joh> the data bus of the RU5s is ALREADY united, so there is no need to separate anything...
Then it is very strange that a direct replacement of RU5 with SIMM,
in which addresses above A7 are grounded did not lead to normal
machine operation.
Check carefully the wiring of the SIMM pins, maybe you counted somewhere :)
Hello John North
Here I drew a diagram that I used to connect it (see connections). but still doesn't want to
work :( ras and cas were taken directly from the PE3 pins, as well as those that went to
RU5. Please take a look at the diagram - maybe it’s not working at all?
and another question: in one source it is depicted that ras and we arrive at the same time.
Maybe they both need to be detained?
File: d45_v2_.JPG http://zx.pk.ru/attachment.php?attachmentid=4252
Hello John North
Joh> I drew a diagram that I used to connect it (see instructions). but still
Joh> doesn't want to work :( I took ras and cas directly from the PE3 pins, as well as
Joh> those that went to RU5. Please look at the diagram - maybe it’s not at all
Joh> working?
Joh> and another question: in one source it is depicted that ras and we are coming
Joh> at the same time. Maybe they both need to be detained?
I don’t know if your signals are connected correctly, but what catches your eye:
1) 1533ЛH2 - inverter with an open collector output, that is, the output is required
you need to put a load resistor to +5V, and not very large, for example
from 470 Ohm to 1 kOhm.
2) KP12, unlike KP2, has an output with a third state, which also requires
This circuit pulls up the output to +5V, the same as in the case of the LH2 resistor.
In both cases, I would recommend replacing the microcircuits with: LH2 -> LH1, KP12 ->
KP2.
PS. RAS and WE can arrive at the same time.
Hello John North
we need cas, ras and we oscillograms
Hello caro
car> In both cases, I would recommend replacing the microcircuits with: LH2 -> LH1,
car> KP12 -> KP2.
does this mean that +5V pull-ups are not needed?
Hello John North
Joh> is it possible to replace 1533 with 555? (only 555kp2 was at hand).
Yes.
Hello John North
I changed m/s, as caro said - everything is the same... people! DON'T LEAVE ME! very
I want to connect SIMM, and I don’t really want to solder the second line again
RU5's...
Hello, Mikka_A
Mik> did you remove the ROM? what does it seem?
\n
I'll take a picture in the evening. at work right now.
Hello, Mikka_A
Mik> what is the same.?!
Joh> there is all sorts of colored crap on the screen and from time to time the spec starts something
Joh> "unload" onto the tape (the corresponding stripes are visible on the border)
The> cas, ras and we oscillograms are needed
Is it possible to make an oscilloscope from the PC?
Hello John North
Joh> is it possible to make an oscilloscope from a PC?
yes. using a sound card.
but it won’t help you - it has a very low bandwidth.
he simply will not understand these frequencies.
There are hardware gadgets for the ps. But it costs money. off the top of my head at least $200
-+---
did you film the film? what does it say?
Hello John North
Joh> changed m/s, as caro said - everything is the same... people! DON'T QUIT
Joh> me! I really want to connect SIMM, and I don’t really want to solder again
Joh> second line of RU5s...
which is the same.?!
describe what is happening? what's on the screen.
then simply make a ROM
describe what's on the screen.
Hello John North
Joh> does this mean that +5v pull-ups are not needed?
means that for mikruhi with “open collector” outputs, such as LP9 and
other (read “more load-bearing”) - must be pulled to
+5.
they simply simply won’t work any other way.
and logic with simple outputs, read LH1 LA3, they do not need such
resistors.
the physiology of their work does not provide for such a need.
Another question is what circuit design will be needed.
but not to ensure functionality.
Hello John North
Joh>
Joh> I'll take it off in the evening. at work right now.
it just has to be a classic “mattress” - vertical stripes.
When you click the reset button, they sometimes move left and right....
Hello, Mikka_A
Mik> what type of flickering?
"colored" is like that.
Mik> are there extra Sim addresses hanging on the ground?
yes.
Mik> sim curve IMHO
Idk... but when I “turn on” the RU5s back, everything works.
Hello, Mikka_A
Mik> there just has to be a classic “mattress” - vertical stripes.
Mik>
Mik> when you click reset, they sometimes step left and right....
nothing. everything flickers anyway.
Hello, Mikka_A
Photos: 1-with ROM, 2-without it
File: with_ROM1.jpg http://zx.pk.ru/attachment.php?attachmentid=4278
File: without_ROM1.jpg http://zx.pk.ru/attachment.php?attachmentid=4279
Hello John North
Joh> "colored" is like that.
photos to the studio.
Hello John North
Joh> nevermind. everything flickers anyway.
sim crooked IMHO
what type of flickering?
Are there extra Sim addresses hanging on the ground?
Hello, Jukov
Juk> When you press reset, everything freezes. You let go - it begins
Juk> flickering - is this how everything happens?
exactly
Hello, Mikka_A
When you press reset, everything freezes. You let go - the flickering begins -
Is this how it all happens?
Hello John North
Joh> exactly
Regeneration does not occur due to desynchronization of the /CASR, /RASR and /WF signals. Try it
use the /CAS signal instead of /CASR. Or the second option is to pass /RASR through
a chain of two series-connected inverters.