dm8000 picture quality gone crap

[heathercar]

never thought i would say this but picture quality coming from my sly hs box is now better than my dm8000 hd.

i dont know weather its my tuner on dm or any other members have notice any differnece in theres

[jimrare]

Don't invest in clones!

[bonehead]

Have you tried updating drivers?

[keymaster]

Hi
you need latest ferrari images,be careful updating "drivers" if its a clone box and check your AV settings in menu to make sure you have it set at 1080i if your TV can do this. My DMk clone has far better pic than my Sky HD box
K

[heathercar]

its not a clone its a genuin box got shut of the clone.

anyways just updated to nemesis 2.3 all seem fine now i might have some bugs or something in flash as i have had quite a lot of blips but at the mo its fine and picture quality is back to its best and hard disk seem to be back to normal thank god

just short of a dts plugin at the mo.

also wonderder what would be the best way to do a complete flash erase to iron out any potential bugs and then flash nemesis would flashing an original image first be a good idea its just ive flashed the box so many times .

also wondered why nemesis wont just let you install 2,3 bootloader 87 without installing 2.2 bootloader 83 first

[oldfart]

.. dts plugin .. what to do? there is a DTS passthrough

.. erase flash ..
I asked this a bit ago, answer was - use DreamUp (yep - back to serial & network) ensures flash is zeroed first

[hda5]

I uploaded the DTS plugin a while ago.

You can grab it here

https://www.satpimps.co.uk/showthread.php?t=146624

[heathercar]

.. erase flash ..
I asked this a bit ago, answer was - use DreamUp (yep - back to serial & network) ensures flash is zeroed first


does anyone know at all what this meens because i havent got a clue

[heathercar]

:respect-020: just reflashed via null modem cable using dream up with dhcp disabled on dm took 50 mins in total phew.

didnt see any option for flash erase or setting flash back to zero so im asuming when you flash via null modem and dream up this method ensures the flash is set back to zero
or am i barking up the wrong tree woof woof :woot-035: :o16:

[jimrare]

Barking on the wrong tree. If you understand how flash memories and storage mediums work, you will see that setting everything back to zero is nonsense if not impossible. In fact a flash erase on most modern flash devices means setting it back to its default state, which is 1! Flash memories aren't able to store 0s and 1s for a long time in the same cell, so there is a controller which moves around data all the time in different positions and some times you could have the same data at multiple places without even knowing it. Of course the user cannot control all this procedure, this is just how flash memories work.

In the end what matters is that in order to write data on your flash, blocks of data are erased and your new data is written at specific parts of your flash. The exact positions of these valid data are known and ONLY these can be accessed. Most likely there are some residual data at some other part, but you don't care because these data cannot be accessed not even by accident, as i said before simply because this is how flash memories work.

Erasing it through the network or through null modem cable will get you the same result, what differs is the speed. Now you know firsthand that serial speed is far slower than ethernet!

[heathercar]

:banghead:

intresting story shame i never read it befor i went to bed might of got some kip zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz zzzzzzzzzzzzzzzzzzzzzzzzz

so im no better of then woof woof or im none the wiser owwoooooooool so how would you ensure it is set back to zero or 1 for that matter smartie pants

[sonic1]

Barking on the wrong tree. If you understand how flash memories and storage mediums work, you will see that setting everything back to zero is nonsense if not impossible. In fact a flash erase on most modern flash devices means setting it back to its default state, which is 1! Flash memories aren't able to store 0s and 1s for a long time in the same cell, so there is a controller which moves around data all the time in different positions and some times you could have the same data at multiple places without even knowing it. Of course the user cannot control all this procedure, this is just how flash memories work.

In the end what matters is that in order to write data on your flash, blocks of data are erased and your new data is written at specific parts of your flash. The exact positions of these valid data are known and ONLY these can be accessed. Most likely there are some residual data at some other part, but you don't care because these data cannot be accessed not even by accident, as i said before simply because this is how flash memories work.

Erasing it through the network or through null modem cable will get you the same result, what differs is the speed. Now you know firsthand that serial speed is far slower than ethernet!

100% correct :king-041:

[jimrare]

so how would you ensure it is set back to zero or 1 for that matter smartie pantsWhy do you think that you need to do such a thing? Erasing a storage medium is not like scrapping off old paint from the wall and painting it all over again! Its like placing box1 in the bedroom, box2 in the bathroom and box3 in the kitchen. You know beforehand where your boxes are so if you want to retrieve them you simply enter the bedroom, the kitchen, the bathroom. You don't care what boxes are in your laundry and you can't even enter the laundry.

By the way, is this what you mean by smartie pants?

[heathercar]

would just like to know how its done no more jack in norys please save them for bed time
zzzzzzzzzzzzzzzzzzzzzzzzzz

[heathercar]

have to say this new image im on nemesis 2.3 has run superbly now for last week i carnt fault it at all.

really havent got the fogiest as to why my box has acted the way it has on oozoon or why the picture quality seems poor on other images.

i always keet the drivers up to date so im at a loss and mthyed as to why.

carnt seem to find any info any where on doing a complete flash erase on a dm 8000

cart fatham why oozoon has played up so much its always been a good image for me but now nemesis beats it by a clear mile.

would of liked to have tryrd a complete flash erase just to rule it out to see if it made a differnece in the performance of oozoon.

from what ive read up sometimes data from a previously image doesnt get completely erased on a flash memory when installing a new image.

i dont know what truth this holds but it makes sense to me that with flashing so many different images just maybe it is poss for images to perform badly if all data isnt completey removed from flash

[jimrare]

from what ive read up sometimes data from a previously image doesnt get completely erased on a flash memory when installing a new image.

i dont know what truth this holds but it makes sense to me that with flashing so many different images just maybe it is poss for images to perform badly if all data isnt completey removed from flash
You already got your answer. What you have read is not true and makes no sense. There is NO WAY that your image performs badly because some data at some other part isn't completely removed. In ALL flash memories, even brand new ones, there are bad cells which cannot be written, which means that you already have bad residual data on your flash before even installing any image! However these bad parts CANNOT be accessed, the same way any residual data from previous installations cannot be accessed, so you don't care whats going on at other parts of your flash.

You can't get wet in sunny Cyprus, when its raining in China. You don't care whats going on in China! Does this make sense now?

[jimrare]

Even if you manage to write all good cells with 1s, what are you going to do with the bad cells? Its almost impossible to create a flash drive without a single bad cell. To be even more precise, flash drive manufacturers that offer you, say 256MB of memory, actually build the device with more capacity to compensate for bad cells, so that in the end you get your 256MB.

[paul01609]

Mines in good working order,its on the avforums :)

[heathercar]

quote jimrare

some times you could have the same data at multiple places without even knowing it. Of course the user cannot control all this procedure, this is just how flash memories work.


so if you can have the same data move around at multiple places how do you that it doesnt get completely removed when flashing a new image.

and how do you know when the new image data moves a round at multiple place it doesnt pick up bug from a previous moving around data image

[jimrare]

so if you can have the same data move around at multiple places how do you that it doesnt get completely removed when flashing a new image.You don't know and you don't care.

Data (0s or 1s, known as bits) is saved in cells. Lets assume we have 100 cells available for storage and that we want to save 5 bits in 5 cells. The flash controller knows beforehand which cells are available and which are not, so it will place our 5 bits in 5 available cells. Lets assume in cells number 16,17,18,19,20. From now on it knows that your data is in cells 16-20 so if it wants to read your data it simply goes to places 16-20 and retrieves your data.

Moreover flash memory cells are not able to save data for a long time because after awhile they get corrupt, due to technology restrictions. The flash controller however is smart enough, so it will frequently move these data before they get corrupt. How frequently depends on the technology. Lets assume it moves our data from cells 16-20, to the available cells numbered 60-64. From now on it knows your data is in places 60-64 and it simply ignores whats in 16-20. This means that cells 16-20 are still holding the past values untill they get corrupt or overwritten. Also cells 16-20 are now available again to store new data.

This is a very simplified explanation, and of course your image plus any other extra data (cams, plugins, recordings), consist of millions of bits. Your flash controller only needs to know where is your valid data, which cells are available and doesn't care whats happening elsewere because it can never confuse invalid data cells with valid ones. Confusing valid data with invalid, means that your flash is destroyed and your box wouldn't even start!

The same happens with your hard disk when you format it. Your data don't get physically removed from the medium, they are still on there untill they get overwritten or they get corrupt.

[heathercar]

hopefully there will be a new plugin called gordon soon.

this is all very well explaining how a flash memory works which i guess anybody with half of a brain could probably copie and paste of the internet
but it stiil doesnt explain how to do a comlpete flash erase.

its all very well raining in China. and being sunny in cyprus but lets not forget how acid rain is caused.
what actually happens when its sunny in china is polution is actually being drawn up in to the sky.
now the sky is made up of thousands of clouds and each cloud can only hold so much rain befor it bursts onto some unlucky city and drops its polution from china.
or maybe on jimrares head

so what we need is a nice new unpoluted china to collect are rain from befor we drop are storage on some poor good region.

or lets think of it another way you have 100 volumes of water and each volume of water can store so much polution befor it carnt store no more.
then what happens is the polution starts to spread else where.
now the only way to stop it spreading is to clean the source or clean the water or add more water which doesnt really solve the problam.

or another way would be to put the polution elswhere and take the easy way out ie reverse your van at 90 miles an hour and slam on your breaks and dump the polution else where ie brush it under the carpet.

so there are so many ways to stop polution spreading but my favorite one would be to clean be able to clean the storage containers that hold the polution
and start from fresh

[jimrare]

I give up. Being ignorant is one thing, getting the full explanation and still being ignorant reaches a different level of stupidity.

[sonic1]

You deserve a medal Jim, as you know I read most of these threads and if you go back over some of the OP other posts and threads you will see they generally follow the same pattern.

I no longer waste my time and energy.

[heathercar]

me to i give up as i really carnt do with patronising people who think they know it all
by the way nice picture of a polar bear jim best thing you have ever posted .
any way going to sign of now as ignorance is bliss.

end of thread thread close .

[snakie]

and cyprus is sunny

[heathercar]

:) sunny here to at the moment hope it lasts.

anyway im not going to give up on this and im going to keep looking into it
hopefully i will come up with something one sunny day.