Cry for help!!!!!!!!!!!!!!!
ZXNet echo conference «zx.spectrum»
Hi Evgeny Milun !
> Hello Tyukaev !
>
> Thursday November 13 1997 19:00, Tyukaev Eugene Vladimirovich ─── All:
>
> [.....]
> TEV> before: I'm typing a simple program in 128 BASIC
>
> TEV> 10 randomize usr 15619:rem:load"intro"code16384
> TEV> 20 go to 10
>
> TEV> this is me watching how errors are thrown in different ways,
> TEV> I do BREAK, and the computer resets to zero, or is reset somehow!
> TEV> tell me, help! what could it be???
> Anything... Try to grasp the system. If in all the bytes
> the same bit(s) are damaged, then... check the tracks/chips in the
> drive controller.
yes, the bits were the same, everything has already become clear!
I have part of the RAM from RU7; for them, regeneration needs to be completed ;(
the computer has stopped resetting, but there are glitches when reading from a floppy disk remained,
and when I tried to change the ROM, all the glitches disappeared as if by hand,
when I tried to reprogram it, nothing happened, although when they
checked it, everything was fine - a dirty trick flew out :-E
thanks to everyone who provided any assistance/help!!!
namely, Alex Letaev for the advice to change the ROM dos!!!
>
> Good luck ! Evgeny.
>
> ■ The night is shorter than the day... The day will kill me... Peaceillusions burn out in him. (C) Aria.
Eugene AKA Point777 of CrazyBrothers/Phantasy
Hi Alex Gofman!
> Hello Tyukaev !
>
> Fri Nov 14 1997, Tyukaev Eugene Vladimirovich writes to All:
>
> TEV> and how do you know what exactly are address????
>
> I know that they are address because when testing the RAM it constantly gave a read error
> #00 s addresses #E000, #E020, #C000, #C020 (I think so, I don’t remember exactly), and
> only on the first four pages - instead of #00 I read #08. I presented all
> addresses in binary form, looked at which bits were changing and checked these lines on
> RUshka responsible for the third bit of data (since it read not %00000000, but
> %00001000). Upon inspection, I discovered that the leg (address) of the upper microcircuit
> was coming off - I soldered it and everything was fine. That's it.
XA-XA !
so I have a test ROM for 128, everything is ok there - I deliberately left
for 2.5 hours - and everything is ok with the RAM! there is a looped RAM test at the end!
In general, I changed the ROM - the glitches with reading disappeared immediately!
BUT! glitches remain ;( what should I do? I load RamDoctor by TyatinSergey/CodeMonst
I test - test RAM, and everything else is OK, but regeneration is driving!
I calculate the bits - I look and there are RU7s there!
I rummage through old circuits, I find the expansion of the pentagon to 512, and
elimination of problems with regeneration - I do as there and everything is OK!!!
>
> TEV>maybe it wasn’t that at all? :(
> TEV> tell us in more detail about your glitches, I’d like to compare!
>
> The glitches were the following:
> 1. When typing BASIC lines, various symbols
> in the line itself randomly appeared and disappeared, sometimes it was completely reset.
me too, but this is due to system errors cells
> 2. From 48 and 128 I never went into TR-DOS - the picture deteriorated and froze.
> I went into TR-DOS only from the PROFI menu (I have a ROM on my computer, by the way
> I tested the memory with his checker - a convenient thing), but when starting the boot -
> hangs.
yes the test was cool, but in my case the test said that everything was ok!
>
> $$$ With best wishes ... Alex
thanks for the support!
Hello, Tyukaev!
13 Nov 97 19:00, Tyukaev Eugene Vladimirovich wrote to All:
TV> the trouble is this: when reading from a floppy disk (even if you take a directory
TV>), it reads with errors, let’s say there is a “boot” file, it shows it to me
TV> as “bgot” and the length is lying, and if I'll start formatting the floppy disk,
TV> it's completely insanity!
Check the power supply on the controller.
Goodbye.
Rick Murray
ri...@murray.chel.su
TEV> 10 randomize usr 15619:rem:load"intro"code16384
TEV> 20 go to 10
TEV> this is me watching how errors appear differently
> Hello, Tyukaev!
>
> 13 Nov 97 19:00, Tyukaev Eugene Vladimirovich wrote to All:
>
> TV> the trouble is this: when reading from a floppy disk (even the directory
> TV>), it reads with errors, let’s say there is a “boot” file, it shows it to me
> TV> "bgot" is lying and the length is lying, and if I start formatting the floppy disk,
> TV> then it’s completely insanity!
>
> check the power supply on the controller.
Hello Tyukaev Eugene Vladimirovich! In a message of 14 Nov 97 Tyukaev Eugene Vladimirovich wrote to All:
>> With tr-dos, if you don’t read from the drive, but just do something, it doesn’t
>> reset? What frequency are both quartzes at?
TEV> doesn’t just reset, but if you break with CAT or LIST, and when
TEV> is output via RETURN, it usually crashes, although this didn’t seem to happen before
TEV> at 14 and 8 MHz
Look at the counter that is located after the quartz. Does the drive position the head
uniformly or jerkily? Check the signal for switching sides of the disc. Check the microcircuit that buffers the signals coming from the drive. If there is a PLL
in the controller circuit, check it, that is, all the mikruchi for reading that are located
after TM2.
>> If you can, enter the circuit, it will be easier to figure out.
TEV> oh, if you scan it, then it will be misery :(
TEV> but although if only the controller circuit,
TEV> but I can’t get into it - why began to reset,
TEV> and what’s most interesting is that with different VGs there are sometimes fewer and sometimes more
TEV> glitches!!!
TEV> thanks for the advice, I’ll try
How many normally formatted sectors does it produce after the format?
P.S. It seems to me that after all, the counter divider after the quartz is broken by one
of the triggers, the frequency is higher on the VG. assembly
is in the drive?Is there a problem when you turn it on?
Sincerely, Alex from FFC COMPUTERS.
Hello Tyukaev !
Mon Nov 17 1997, Tyukaev Eugene Vladimirovich writes to All:
TEV> here is regeneration - it's driving! I calculate the bits - I look and there are RU7
TEV> there! I'm rummaging through old schemes, I discover the expansion of the pentagon to
TEV> 512, and
TEV> eliminating problems with regeneration - I do the same and everything is OK!!!
Tell me more about the expansion scheme, otherwise I have some, but I don’t know
whether it works - there are TM2, LL1, KP12 (KP2).
2All: people, tell me what kind of cache is on the Pentagons, do any programs support it, how does it connect.
> Get Msg, Tyukaev!
>
> 13 Nov 97 19:00, Tyukaev Eugene Vladimirovich reported All about {Cry for help
> !!!!!!!!!!!!!}:
>
> TEV> 10 randomize usr 15619:rem:load"intro"code16384
> TEV> 20 go to 10
> TEV> this is me watching how errors are thrown in different ways,
>
> Viruses 8-( )
> Hello Tyukaev Eugene Vladimirovich! In a message of 14 Nov 97 Tyukaev Eugene Vladimirovich wrote to All:
>
> >> With tr-dos, if you don’t read from the drive, but just do something, it doesn’t
> >> reset? What frequency are both quartzes at?
> TEV> doesn’t just reset, but if break occurs with CAT or LIST, and when
> TEV> is output via RETURN, it usually crashes, although this didn’t seem to happen before
> TEV> at 14 and 8 MHz
>
> Look at the counter that is located after the quartz. Does the drive position the head
> evenly or jerkily? Check the signal for switching sides of the disc. Check
Hello Tyukaev Eugene Vladimirovich! In a message of 17 Nov 97 Tyukaev Eugene Vladimirovich wrote to All:
TEV> thanks to everyone who provided any assistance/assistance!!!
TEV> namely Alex Letaev! for the advice to change the DOS ROM!!!
Yes! Got a floating schmuck! A rare malfunction, or someone did a bad job.
It’s just strange that it just didn’t reset in the dosa. :-)))
TM2, LE1, KP12 (KP2)
this circuit is from V.M.G. , there are still improvements to Leningrad 1 and 2,
applied to the first - everything works!
well, what exactly should I tell you???
> Hello Tyukaev Eugene Vladimirovich! In a message of 17 Nov 97 Tyukaev Eugene Vladimirovich wrote to All:
>
> TEV> thanks to everyone who provided any assistance/assistance!!!
> TEV> namely Alex Letaev! for the advice to change the ROM of the dosa!!!
> Yes! Got a floating schmuck! A rare malfunction, or someone did a bad job.
VM> Surroundings 8-( )
Day!!! ;)
__ With cre...@online.nsk.su
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\XX/ Regards 2:5000/28.19@fidonet
TEV> hmm, crap, in the one I have these microcircuits:
TEV> TM2, LE1, KP12 (KP2)
TEV> this circuit is from V.M.G. , there are still improvements to Leningrad 1 and 2,
TEV> was applied to the first - everything works!
Sorry, mistake - on the diagram it says LE1, not LL1, so it looks like our schemes are
the same. I just wanted to know if it was working, otherwise I'm going to expand
the memory and I wouldn't want to solder a non-working circuit.