A document for Electronic abbreviations senses - Hardware Hacking General

I looking for electronic Abbreviations details and its explainations , I know some but a lot are still mysterious for me .
a document ( why not ) where I will find the majority of abbreviations which are generally used in the device services manual currently .
I've concentrated my works on hardware now . trying to found some popular HW faults source on what nobody work yet or simply ignored becoz seen as wasting time . so I think better for me is to well know these abbreviations sense if I want work fairly . and get positive result . hope get one soon . it will b great for me thx advanced at all who will read post ..

http://forum.xda-developers.com/wiki/FAQ
http://forum.xda-developers.com/wiki/Acronyms

Renate NST said:
http://forum.xda-developers.com/wiki/FAQ
http://forum.xda-developers.com/wiki/Acronyms
Click to expand...
Click to collapse
Appreciated but it's not what I needing .

Renate NST said:
http://forum.xda-developers.com/wiki/FAQ
http://forum.xda-developers.com/wiki/Acronyms
Click to expand...
Click to collapse
Thanks for the links, I can put a checkbox in "learned something today" (The BFS description actually made me laugh).
To the OP:
You might want to be a bit more specific, a generalized list of all electronic abbreviations related to hardware would....probably make a dictionary look small. If you want PC hardware, that's one list. Networking, another. Integrated circuitry, a third. etc.

H2O Rip said:
Thanks for the links, I can put a checkbox in "learned something today" (The BFS description actually made me laugh).
To the OP:
You might want to be a bit more specific, a generalized list of all electronic abbreviations related to hardware would....probably make a dictionary look small. If you want PC hardware, that's one list. Networking, another. Integrated circuitry, a third. etc.
Click to expand...
Click to collapse
yes what I'm looking for is related to electronic Hardware in general .
for PC, SMartphone , Tablettes etc .... Exemple : Vbat = batt source ....

Nice links !

sure I'm not alone here who needing this thing . in my case I found a link firstly .
and I still searching to get better than this http://www.interfacebus.com/Faq-interfacebus.com.html

Related

Shift hardware pictures and dissasembly guide

Hello ppl,
I'm going to make a shift dissasembly guide, covering basic tips on how to dissasemble, how to upgrade various components and so on. I will include detailed pictures on how components are linked one to each other and so on.
My question is: what do you people want to see? If there are some of you who want pictures with a specific component, please reply or give me some ideas. I'll open the shift in 1-2 days so please come with suggestions.
Of course, the first 2 points on my agenda will be how to upgrade hdd and ram modules.
facdemol said:
what do you people want to see? If there are some of you who want pictures with a specific component, please reply
Click to expand...
Click to collapse
Thanks
Remove the metal covers and take high quality picture of every chipset, where the model and manufacturer can be seen.
If you can identify how the touchscreen is connected (shared) between x86 and arm, that would be cool... we need to know if it is a serial or i2c bus, specially the x86 side.
facdemol said:
Hello ppl,
I'm going to make a shift dissasembly guide, covering basic tips on how to dissasemble, how to upgrade various components and so on. I will include detailed pictures on how components are linked one to each other and so on.
My question is: what do you people want to see? If there are some of you who want pictures with a specific component, please reply or give me some ideas. I'll open the shift in 1-2 days so please come with suggestions.
Of course, the first 2 points on my agenda will be how to upgrade hdd and ram modules.
Click to expand...
Click to collapse
Can't wait!!!
facdemol said:
My question is: what do you people want to see? QUOTE]
Some people said that there is no connection between the SD card and SnapVUE. If SnapVUE needs to access the SC card, it may require direct soldering. I wish to see whether it is necessary or possible. Thank you.
Click to expand...
Click to collapse
I've got the ideea. I've opened a lot of stuff in my life, ranging from pda's to laptops but with the shift i'm a little nervous. Most of the htc devices i've dissasembled had some pretty weird casing connections.
I will also study how the hinges work and if the slide mechanism can be upgraded. Some ppl say it could. I'm also veeerry intrested to see how the display pannel and ram are connected to the x86 side and the ppc side.
I'll get to work in about 6 hours and when I'm done i'll open a new thread with the guide and photos.
can't wait to..

Opinions and ideas on the upcoming beta!

Okay,
I have this problem where I am never pleased with anything I do, so I keep trying to improve it and improve it even further. The time has come.
I have been coding the new features for my website (www.touch-innovation.com) and here is the list I have thought of and has users suggest via email:
- Live submit (Submit directly onto the site... instantly. With lots of security though )
- Screenshots on category lists
- Download names instead of random hash.
- Add comments to news sections
- And lots of admin panel updates which you don't need to know about
Another thing is, what do you think of the design. Does it need a re-design? Does it need to be minimilsed or what not?
Help me out come on, throw me some ideas!
<3
dude, this sounds great
all of those features sound like excellent additions. good work on the coding
no, the site looks fine the way it is
Why do you want to change that site it's clear easy to use and looks cool
Because people have complained about the fixed backgrounds on the left and right. I was thinking of making them a bit thinner to make more room for content and shiz.
Thanks for your compliments, so you don't have any other feature requests? And the Live sumbmission idea, would anyone use it?
Thanks again
Anyone with a decent knowledge of php drop me a line. I'm having problems editing filenames on the fly (sounds easier than it is trust me, complex scenario).
The one and only thing I'd like to see changed? Not use javascript when clicking on applications to take you to their detail page. I get annoyed when I can't open it in another tab
It only uses javascript for the onhover effect and to make the whole td a link. If you want to open it in the new tab, just right click on the name (which is a hard link, for people without javacript).
It's been like this since first release, I did it just incase of no javascript
Napbree said:
Anyone with a decent knowledge of php drop me a line. I'm having problems editing filenames on the fly (sounds easier than it is trust me, complex scenario).
Click to expand...
Click to collapse
I guess I need more specifics, but a nice little loop with the function rename() should do the trick. I am sure you have looked at some resources, but the php.net site is great, here is rename with tons of good examples, some of which I have used in the past:
http://us.php.net/manual/en/function.rename.php
Hope this helps, FYI the site looks great!
Gudy
Thanks, rename isn't on the fly though. I'd have to rename it, then let the user download it... wait till the user has downloaded it, and then rename it back. And what hapens if someone else trys to download it in the proccess of this, they'll get a 404 for the file. I'd have to copy to a new location and do it that way. No point, I need on the fly not permanent. Normally I would use the rename function but it's not helpfull in this sutation.
I just need to play with the headers for a while and get them working .
Thanks for your help though
And thanks for the compliments.
Napbree said:
Okay,
I have this problem where I am never pleased with anything I do, so I keep trying to improve it and improve it even further.
Another thing is, what do you think of the design. Does it need a re-design? Does it need to be minimilsed or what not?
Click to expand...
Click to collapse
hell yeah, I know that feeling...I´m never pleased with my designs as well
And no, it doesnt need a major refresh yet but try to make the background a bit lighter so the whole site gets a bit more contrast. Just lighten up the background by 10-20% or so and show us what it would look like
And tell me if I´m wrong...but "Touch friendly programs for the windows mobile" sounds extremly strange, what about leaving the "the" out ?
regards,
Martin
Napbree said:
Thanks, rename isn't on the fly though. I'd have to rename it, then let the user download it... wait till the user has downloaded it, and then rename it back. And what hapens if someone else trys to download it in the proccess of this, they'll get a 404 for the file. I'd have to copy to a new location and do it that way. No point, I need on the fly not permanent. Normally I would use the rename function but it's not helpfull in this sutation.
I just need to play with the headers for a while and get them working .
Thanks for your help though
And thanks for the compliments.
Click to expand...
Click to collapse
I didn't understand what you needed, and I think now I do, you want to change the name as someone is downloading a file correct? If so, check this sample out, modify the header section as needed, ie this line:
header("Content-Disposition: attachment; filename=\"$file\"");
you could do any type of processing on the name you need, then just pass the string like above. Here is the link to the rest:
http://apptools.com/phptools/force-download.php
Hope this helps
m.schmidler:
Thanks, I'll try that now. And the "The" bit... Well it makes it sound like it's the only decent phone - aka unlike iphone . Its pronounced th-eee not th-u. So it sounds slightly different.
Get what I mean?
mjg7876:
I've been looking into the disposition header for a while, but the way I currrently download files is quite simple but to interlock these 2 things togeather is complex. Especially considering I will need to do checking, exploding (for the file extension) and redirecting if it's not hosted on the server. I make things too complicated lol.
Thanks for your help guys btw
Anyone else?
Is it me or does the logo from this site in this post look very similar to yours?
http://forum.xda-developers.com/showthread.php?t=441647
Great Site
I love your Site. In my opinion : it doesn't need any re-design.
But i do have one suggestion : it would great to have your tables with worting features.... One could just click on the title of one column and it would be sorted.... Understand what i mean ?
Thank for your work.
Thanks for your kind words
And btw, you can already sort them (programs list only atm). Simply click on the title, download, views, etc. and it will resort.
Try it
BTW: That logo looks like a skeleton version of mine :/. There's everthing thats on mine, just minimilised! What's going on? :/
ATM work is up to my eyes, so I've had to slow down on the development. It's not something I can rush due to security.
Any more suggestions I will be more than greatful

PLS help with 4thing to diamond

hi guys, sorry for new thread but i need few things for my diamond. i wrote to support center but no answer, here is what i need
"hi guys, have diamond for a few days, searched and read lot of stuff here but still didnt find exactly what I wanted, maybe somen can help me with these things:
1. I would like to have battery life in % eg: 75%
2. Some simple organizer (dont like default calendar too much)
3. which processes I can kill with something to get more performance from my diamond? (for example: i kill opera9 - which I dont use and the process starts automatically)
4. really good and simple keyboard which can be used by fingers
really big thanks to someone who can help"
hawk_ktulu said:
hi guys, sorry for new thread but i need few things for my diamond. i wrote to support center but no answer, here is what i need
"hi guys, have diamond for a few days, searched and read lot of stuff here but still didnt find exactly what I wanted, maybe somen can help me with these things:
1. I would like to have battery life in % eg: 75%
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=437307
hawk_ktulu said:
2. Some simple organizer (dont like default calendar too much)
3. which processes I can kill with something to get more performance from my diamond? (for example: i kill opera9 - which I dont use and the process starts automatically)
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=418151
hawk_ktulu said:
4. really good and simple keyboard which can be used by fingers
really big thanks to someone who can help"
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=460872
Now I found these all on the very first page of the forum.
So I'm going to use a quote that is been used many times on the forum.
USE THE ****ING SEARCH TOOL.
it's there for your pleasure.
also, just browse around and who knows what nice things you may find.
FuzzFuzz said:
http://forum.xda-developers.com/showthread.php?t=437307
http://forum.xda-developers.com/showthread.php?t=418151
http://forum.xda-developers.com/showthread.php?t=460872
Now I found these all on the very first page of the forum.
So I'm going to use a quote that is been used many times on the forum.
USE THE ****ING SEARCH TOOL.
it's there for your pleasure.
also, just browse around and who knows what nice things you may find.
Click to expand...
Click to collapse
there is ton of stuff here, Ive tried to read lot of threads/posts - tried search, maybe I was using wrong words...didn't find much things that I though it is useful
so ****ING thangs for answer, I will look at those threads
hawk_ktulu said:
there is ton of stuff here, Ive tried to read lot of threads/posts - tried search, maybe I was using wrong words...didn't find much things that I though it is useful
so ****ING thangs for answer, I will look at those threads
Click to expand...
Click to collapse
Well, there is this thing about this forum.
You see, lots of people are building nice little programs for windows based phones, and there are many things that they didn't think of, because they didn't think that their keyboard was a really big problem.
They did find it a problem to have a keyboard to use with their fingers, because ot wouldn't leave enough space for their text mesaging.
battery life, it's seeded on the forum about that object.
and I did see a program that helped closing programs for you, but you might just wanna try start -> settings -> taskmanager -> buttons, maybe this already helps you
Everything on this forum is free and everyone is very willing to help you, but not if we see a question for the so maniest time.
What I propose to you, is if you are looking for something, but can't find it, make a request.
make perfectly clear what you are looking for and how this could benefit you.
maybe one of the programmers might see the benefit as well and wants to write someting for you.
hawk_ktulu said:
hi guys, sorry for new thread but i need few things for my diamond. i wrote to support center but no answer, here is what i need
"hi guys, have diamond for a few days, searched and read lot of stuff here but still didnt find exactly what I wanted, maybe somen can help me with these things:
1. I would like to have battery life in % eg: 75%
2. Some simple organizer (dont like default calendar too much)
3. which processes I can kill with something to get more performance from my diamond? (for example: i kill opera9 - which I dont use and the process starts automatically)
4. really good and simple keyboard which can be used by fingers
really big thanks to someone who can help"
Click to expand...
Click to collapse
Well the answers you have got show just what an unwelcoming and unfriendly place this is - certainly one of the worst forums for that I know. But then lots of useful info too, and that is the problem. Despite the "in crowd" people's suggestion the search tool is marginally more useful than wetting your finger and sticking it in the air, unless you are used to it!
Just a shame nobody has any Christmas spirit for newcomers aint it!
Hmm, I see what you mean.
Funny thing is, I didn't mean it to be this harsh, but as I read it back, I see how easily it is to provoke people.
So hereby I apologize to Hawk-Kthulu
I'll also will use the f word some less in the future.

[Q] How are we supposed to know what to tick and untick in EXT packages?

Ok, so here is my dillema, as I am new to cooking, I have never yet had to update the EXT packages when a new base comes out, bobsbbq ticked and unticked what was needed and not needed when I made my first kitchen, using the Leo TMOUS 2.10 base packages. Not 2.11 is out and I need to work out what I need and dont need, so Im thinking that I should write down what is unticked now, and then use that as a guide for the 2.11 packages, good idea?
Also can anyone explain why certain things are and arent needed? I have the same problem when updating SYS to thanks. (Although some I can work out is because its Tmob stuff we dont need)
My general rule of thumb is this: if you don't know what it is, leave it in. Some things are obvious, like mp3 trimmer, manila or labyrinth. Leave them in or out, it's your choice. A lot of the non-obvious packages are just dll's that several different HTC apps may need to function. You can use a dependency scanner to see what apps need what, but that can be complicated. It's always a good idea to look in the package and see what's there, and look in the rgu's for clues.
http://www.mobileunderground.info/showthread.php?t=3841
Check the above thread.
I'll give a simple and straightforward answer to the very broad question..
Q:
How are we supposed to know what to tick and untick in EXT packages
Click to expand...
Click to collapse
A:
Read, search, read some more, build rom, more searching, read, read, build rom, read again, then search and read. Repeat, and rinse.
Hope that helps.
Farmer Ted said:
My general rule of thumb is this: if you don't know what it is, leave it in. Some things are obvious, like mp3 trimmer, manila or labyrinth. Leave them in or out, it's your choice. A lot of the non-obvious packages are just dll's that several different HTC apps may need to function. You can use a dependency scanner to see what apps need what, but that can be complicated. It's always a good idea to look in the package and see what's there, and look in the rgu's for clues.
Click to expand...
Click to collapse
Thanks that a good idea, I will go through and do that tonight
ai6908 said:
http://www.mobileunderground.info/showthread.php?t=3841
Check the above thread.
Click to expand...
Click to collapse
Great thread thanks man, very useful
indagroove said:
I'll give a simple and straightforward answer to the very broad question..
Q:
A:
Read, search, read some more, build rom, more searching, read, read, build rom, read again, then search and read. Repeat, and rinse.
Hope that helps.
Click to expand...
Click to collapse
Thanks...
+1, yeah all packages in rom have a function.
The only way to find out is indeed logical thinking and your suggestion.
indagroove said:
I'll give a simple and straightforward answer to the very broad question..
Q:
A:
Read, search, read some more, build rom, more searching, read, read, build rom, read again, then search and read. Repeat, and rinse.
Hope that helps.
Click to expand...
Click to collapse
indagroove said:
I'll give a simple and straightforward answer to the very broad question..
Q:
A:
Read, search, read some more, build rom, more searching, read, read, build rom, read again, then search and read. Repeat, and rinse.
Hope that helps.
Click to expand...
Click to collapse
+1...Comes usually through experience....
Originally Posted by ai6908
http://www.mobileunderground.info/showthread.php?t=3841
Click to expand...
Click to collapse
Great link, Thanks. I have often thought that this would be a great resource thread here.
I have also had a problem with this and many times the only answer is trial and error. Though the more I cook the better I am getting at figuring this stuff out by dissecting the package a little.
I know that "Search and you will find it" is a common (and overused IMHO) answer abound here but I have found that searching for package names rarely leads me in the right direction.
cj
chrisjaffe said:
Great link, Thanks. I have often thought that this would be a great resource thread here.
I have also had a problem with this and many times the only answer is trial and error. Though the more I cook the better I am getting at figuring this stuff out by dissecting the package a little.
I know that "Search and you will find it" is a common (and overused IMHO) answer abound here but I have found that searching for package names rarely leads me in the right direction.
cj
Click to expand...
Click to collapse
IMO, searching is important, but equally important is reading about things when you aren't necessarily searching for specific answers. Doing this, you will often find useful information by chance which you aren't really even actively searching for. I think the real lesson is to constantly keep up with as much of the latest developments as possible, even if you may find them unnecessary in your particular situation. This gained knowledge will only lead to a more fully holistic understanding of the cooking process, which is really the point.
indagroove said:
IMO, searching is important, but equally important is reading about things when you aren't necessarily searching for specific answers. Doing this, you will often find useful information by chance which you aren't really even actively searching for. I think the real lesson is to constantly keep up with as much of the latest developments as possible, even if you may find them unnecessary in your particular situation. This gained knowledge will only lead to a more fully holistic understanding of the cooking process, which is really the point.
Click to expand...
Click to collapse
i think this is very true i hear people complain all the time about how they cant search and find what they are looking for, but truth is that if you do enough reading you will find your answer and learn a whole lot more in the process
Package repository
[★] said:
Also can anyone explain why certain things are and arent needed?
Click to expand...
Click to collapse
I had (and still have) the same problem. So I started to figure out what which package does. There are still packages that I haven't figured out yet but those I have figured out I've uploaded to a public Mercurial repository. You can find it here:
Code:
ttp://bitbucket.org/da_cug/cleanroom/overview
(just prepend "h" - I can't post URLs here yet)
If you don't want to clone the repository (or if you don't know what Mercurial is) you can click on the "Source" tab and browse the repository. The description of each package can be found in the "readme.txt" files within each package folder.
The (my) idea of this repository is that there is a central place for all packages/devices/languages to which users can contribute to (rather than each cook doing this on his/her own).
Note that the repository is not yet complete. I only upload packages for which I know (or think I know) what they're doing. Any help with this is appreciated. Just write me a message.
Looks interesting da_cug, xplain how we can helps you with this thing... its a magnific Info source.
indagroove said:
IMO, searching is important, but equally important is reading about things when you aren't necessarily searching for specific answers. Doing this, you will often find useful information by chance which you aren't really even actively searching for. I think the real lesson is to constantly keep up with as much of the latest developments as possible, even if you may find them unnecessary in your particular situation. This gained knowledge will only lead to a more fully holistic understanding of the cooking process, which is really the point.
Click to expand...
Click to collapse
Good Point.

I'm new to this

well I'm to this l and i was just wondering a couple things like what is a ROM and how do i get the new windows mobile 7 theme stright on my htc hd2 or how do i get the games for my ps1 games stright on my phone without hooking it up to a computer .
Play station info:
I went into the Apps part of this forum and searched for PSX
I would suggest you read the sticky threads at the top of each section on this forum it will tell you lots.
Good luck
curtismeulen said:
well I'm to this l and i was just wondering a couple things like what is a ROM and how do i get the new windows mobile 7 theme stright on my htc hd2 or how do i get the games for my ps1 games stright on my phone without hooking it up to a computer .
Click to expand...
Click to collapse
How about using the search function, looking at the stickys and using Google to find the answers to your questions? It gets a bit redundant replying to the same questions from lazy people that cannot be bothered to invest some time into the forum.
If you don't want to answer the question then perhaps you should save your time even more and not reply? I'm no stranger to forums, but I do find this one particularly hard to follow/read/search.
From what I understand of how search engines work (for example Google's pagerank system) the search results would be dramatically improved if people posted links to relevant pages. This would also be a much better use of time than repeatedly having a go at new visitors for not searching. The more places that point to the answers, the easier it is to find them.
Some people are also happy to reply, because they know the answer straight away and it will take 60 seconds to reply. I don't see that it hurts to ask, in the hope that it will avoid 30 minutes of searching, which of course, is probably going on at the same time. If you are looking for something, do you not ask around whist you look yourself?
Anyway, more constructively back to the original question... @curtismeulen
Basically the ROM is the operating system that your phone runs on. You can install apps on to your phone (which mostly come in .CAB files) and most ROM come with a load of apps preinstalled.
HTC make the standard ROM for the HD2, but also phone companies (O2, T-mobile, etc) make slightly customised versions for the phones they sell themselves, - for e.g. adding/removing particular apps, or a special startup screen or background image, etc. If you have one of these kind of ROMs then you can't install the HTC one without running special programs.
The third kind of ROMs are 'custom ROMs' made by experts who want to always have the cutting edge software, have the phoen set up exactly as they prefer and to improve on what HTC do. Again special programs are required to install these, and always when you install a new ROM there's the risk of something going wrong and your phone not working any more.
Here's some links to useful info:
The HD2/Leo page on this sites wiki:
http://wiki.xda-developers.com/index.php?pagename=HTC_Leo
a list of ROMs for the HD2 (though it's not quite up to date):
http://wiki.xda-developers.com/index.php?pagename=HTC_Leo/ROMs
Stuff about installing different ROMs:
Changing "official ROMs" from one to another: http://forum.xda-developers.com/showthread.php?t=591314
Installing any ROM you like: http://forum.xda-developers.com/showthread.php?t=606713
Personally I use this ROM:
Artemis HD2 ROM Family Ver 15.5: http://forum.xda-developers.com/showthread.php?t=612580
The instructions there are also quite useful to give you an idea of the differences between ROMs, etc.
mpaxton said:
If you don't want to answer the question then perhaps you should save your time even more and not reply? I'm no stranger to forums, but I do find this one particularly hard to follow/read/search.
Click to expand...
Click to collapse
Don't be obtuse, the stickys tell you everything you need to know with regards to ROMs and ROM flashing. Google search 'ps1 emulator for windows mobile' and FPSEce and a number of other emulators are listed in the first link.
It probably took him longer to register to ask the question than it would have done to research it for himself.
I dont undertstand why people get so offensive, i thought forums like these were made to help people with questions, even noobs?
nirvanafreak919 said:
I dont undertstand why people get so offensive, i thought forums like these were made to help people with questions, even noobs?
Click to expand...
Click to collapse
Actually, this forum is call xda "DEVELOPERS".... name clearly means it's full of developers.... not really a place for newbies. There are plenty of help forums out there. This forum is for the advanced user who wants to learn to hack and help develop. I didn't even post for the first year or 2 that I was a member... not until I felt comfortable with my knowledge. I used other help forums that are meant for newbie questions and just watched and learned from this forum.
Help form
For friendly site try htchd2forum.com They are great, but as stated, this is dev site, theirs is help site, big difference,, good luck
mpaxton said:
Anyway, more constructively back to the original question... @curtismeulen
Basically the ROM is the operating system that your phone runs on. You can install apps on to your phone (which mostly come in .CAB files) and most ROM come with a load of apps preinstalled.
Click to expand...
Click to collapse
Actually ROM is Read Only Memory
It has come to be used as short form for the coded OS that is used in the ROM and that specifically is the "ROM image" of the OS in use.
So any cooked (or otherwise) "ROM" we are talking about is not the same as the "ROM" within the device.
...and even though it's called read only memory, it can still be written to, otherwise we'd not be able to install different kinds of operating system, etc. So to me it's an arbitrary set of letters used to describe something that's vaguely relevant to the original usage of them!
mpaxton said:
...and even though it's called read only memory, it can still be written to, otherwise we'd not be able to install different kinds of operating system, etc. So to me it's an arbitrary set of letters used to describe something that's vaguely relevant to the original usage of them!
Click to expand...
Click to collapse
You don't install anything to the ROM.
ROMs are flashable, which is different to installing things to. OSs are flashed, not installed, to devices.
The internal memory part of the device is different to the ROM, it is an 'open' writable section. It may well be on the same memory chip, but is different in terms of usage available to it.
mpaxton said:
...and even though it's called read only memory, it can still be written to, otherwise we'd not be able to install different kinds of operating system, etc. So to me it's an arbitrary set of letters used to describe something that's vaguely relevant to the original usage of them!
Click to expand...
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And as a follow on from rp-x1 and also as a quick history lesson to you "youngsters" the correct term is actually "EPROM" chips (Electronically Programmable Read Only Memory) and when they were first used you couldn't write to them unless you had the appropriate equipment and that included UV "fixing ovens"!!!!!!
So, it's not an arbitrary set of letters, but, more a corruption of a very precise acronym which is now used in completely the wrong way.

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