Hi. When you plug in your calculator, does the menu shown at 0:38 appear on your calculator? Make sure to press F1 when it does appear.

You have to use the polynomial solver in equation mode for this most of the time annoyingly.

You're welcome!

Annoyingly, you can't always do that with this feature. Sorry.

My calculator is a cg20 btw

@@rodrigoadegas2775 Hi, the version of Doom I showcase in this video only works on the fx-CG50. The CG20 that you own is an older model. Try this version instead: www.cemetech.net/downloads/files/755/x755 (use the same WAD file). I have never tested this version, so I don't know if it will work, but it should.

@@bongo50_ It works but it's too laggy an i cant change thw framework, I'm not sure if there is a key for that

@@rodrigoadegas2775 Try pressing VARS a few times and see if anything changes. If nothing changes, I'm afraid I don't know how to solve the issue, or if it even is solvable.

​@@bongo50_ It doens't work. But tank you for the suport

You're welcome!

I don't think this is possible, sorry. It's a bit of a weird omission.

@@bongo50_ Thanks for the info! What about the "S<->D" key? If you hit that, will the sqrt(61) become "7.8102.."? Maybe I could live with that since really, I don't get a lot of exact answers with my work.

@wormdamage oh yes, pressing that will work but you'll have to do it every time. I thought you already knew about this as you mentioned hitting a key each time.

@@bongo50_Guilty as charged! In my original post, I was ready to reject the calculator based on having to hit "S--D", but when I realized that shouldn't be a deal breaker, I figured I'd better confirm that the "S--D" really does work in that situation. Thanks for the videos! You convinced me to buy one of these and so far I love it! This thing responds SO much faster than my Ti-89 that I think (really, hoping) that the double keypresses I'm occasionally getting are my technique and not a fault of the calculator.

Great, I'm glad to help. I also occasionally get the double key presses. It hasn't bothered me too much in my nearly 3 years of using the calculator, but I agree it is annoying.

Thank you! The glare is super annoying, I agree. I've not yet found a good solution to get rid of it. My equipment for filming is very unprofessional which doesn't help

You're welcome!

What wad file were you using?

@@bongo50_ one I downloaded from a website that makes games for these calculators.

@@bongo50_ having same issue, I used the one you recommended (Doom shareware)

Hmm ok. Would one (or both) of you be able to message me on Discord with a photo of the error message? My Discord is bongo50.

@@bongo50_ I myself have fixed my problem by just deleting and redownloading the program, but thank you for the help nonetheless. Great video!

When you open your calculator's storage on your computer, it's just the first folder that opens

@@bongo50_ the main folder named f I tried that and it doesn’t work

@usmaniftkhar3561 in what way does it not work? Can you tell me anything that's in the folder you've tried?

@@bongo50_ I downloaded the sharewear or whatever it was called. Dropped that into the main folder of the calculator. Let it download. Unplugged it and nothing shows up

@@usmaniftkhar3561 did you install the g3a file as well? You need both

@@usmaniftkhar3561 what shows up on your calculator screen when you plug it in? What type of computer (Windows/Mac/Linux) do you have?

@@bongo50_ Nevermind was a faulty wire and what is a root folder I heard u mention it in another video. Cos whenever u download doom it doesn’t pop up on my calculator

Thanks, I'm glad it was useful!

It's definitely faster than usual usage but it's not terribly bad. I can't give any exact numbers, though

@@bongo50_ Thanks anyways, ill stick with the snake game and play Doom in pure class boredom

I believe that your calculator is set to "linear" mode when it needs to be in "math" mode for this to work. On Run-Matrix, access setup by pressing SHIFT and MENU. Then, press F1 to switch the first option ("Input/Output") to "Math". Let me know if this helps!

You probably need to adjust your v-window. In the graph screen, press SHIFT, then F3, then F1 and then EXIT. Does that work?

@@bongo50_ YES! Thank you

You're welcome!

Absolutely not. In fact, you can't use Khicas in A level exams as it has features that are explicitly banned. It can be useful for checking in homeworks, particularly in further maths, as long as you put your calculator in exam mode for exams, but you don't need it at all. The default calculator is completely fine.

Excellent, I'm glad I've been able to help!

What level of maths will you be studying? It's possible that this would be overkill and you could get away with a cheaper and less powerful calculator. Moreover, check what calculator your school recommends as that will have the features you need for your class and your teacher(s) may only be familiar with certain models. For example, while this calculator is standard in the UK for A level maths to the point that textbooks include instructions specific to it, the US tends to prefer Texas Instruments calculators. This is a great calculator, but you want to make sure it matches the maths you'll be doing. It's even possible that only certain calculators will be allowed in exams (although this calculator does have multiple exam modes so it shouldn't be an issue). If you decide that this is a good calculator for what you're doing, either of those prices sound good to me. I've found that the buttons start to become mushy and the case loses some of its grip with use so getting the calculator new might be better, if you can afford it. I've also lost all of the rubber feat on my calculator so you'd want to check that the used one still has all of those. Also, if you want to put games like Doom on the calculator, you need a link cable so, if you do get it used, make sure it includes that. Ultimately, it's up to you. Depending on how important maths will be to your studies and your future, it might be worth investing the extra $20 to get a new calculator that may last you longer before becoming too worn down to use. If you only need this calculator for a year or two and then you'll never touch it again, the used one would probably be fine.

@@bongo50_ so far just algebra 2, but I'm gonna try to use it till I graduate in about 3 years. Mainly I'm focusing on computer science as well and I think a calculator could also help. I would go for a Texas instruments calculator but I don't know which would be better

​@@bongo50_ There's 2 used ones left and 13 new ones left. I'm most likely going to get a used one because it should be in really good shape, just no original packaging, manuals, or cables. I already have a mini USB cable that I can use. "Working condition and very light wear"

@nicktender Are you interested in writing code for your calculator? If so, the fx-CG50 is probably better than any TI calculator as TIs are harder to unlock to allow unrestricted software development. Otherwise, I think something in the TI-84 Plus series would probably suffice for your course. The TI-84 Plus CE Python is the latest model but, if you don't care about programming with Python on your calculator, the slightly older TI-84 Plus CE would probably be cheaper. The TI-84 Plus series is a bit worse than the fx-CG50 so, if you want a more powerful TI calculator, you'd want something from the TI-Nspire series. The TI-Nspire CX II CAS is the newest and most powerful model but is almost certainly completely overkill unless you're going to be studying maths in college and stuff. Ultimately, unless your school specifically recommends a TI calculator, the fx-CG50 is probably better value for money considering the level of maths you'll be studying, but I might be a bit biased.

I've just seen your second comment. That sounds good, especially if you already have a cable. The manual that comes with the calculator is not very useful anyway and the full one is available online from Casio's website.

I don't think so. I've found one for the TI-84 Plus CE but that's a completely different make and model of calculator.

At what point in the process did it turn white? Is it still white? If so, use a pencil to press the reset button on the back of the calculator and see if that helps

@@bongo50_ when i opened the game i downloaded on my calculator

Sorry, I've never heard of this add-in

@@bongo50_ ok thanks , good video

I don't think it's possible to directly calculate the rank of a matrix. However, you can reduce matrices to row echelon form. In the "MAT/VCT" menu, press F6 and then F4 (Ref), followed by (e.g.) "Mat A" to get "Ref Mat A", then press EXE. The number of non-zero rows will be the rank of the original matrix.

I'm not sure which values will work best - you may need to test multiple sizes. I've also realised that you should be able to zoom in and out of pictures using the + and - keys. That might be easier than this method.

Use an online tool like imageresizer.com/ to make the images smaller before adding them to the calculator.

I do but it's a private account for friends only. If you have Discord, I'm happy to use that, or otherwise email works.

@@bongo50_ what’s your discord?

@@bongo50_ oh ok I have discord, what’s your username?

@bongo50

To get the images on your calculator, plug the calculator into a computer and copy the images into the calculator’s root folder (e.g. directly into the calculator and not inside any subfolders) in exactly the same way you would install a .g3a add-in file as I show in this video.

@@bongo50_ yo bro do you have Instagram because every time I try do it I face something different

You can use the image viewer add-in. You can download this from cemetech.net/downloads/files/1153/x1153 and then install it using the process described in this video. Then, take your images and place them in the root folder of your calculator. You should then be able to view them with this add-in. Let me know if you need any more help.

Thanks.

Do you mean an image viewer add-in? You can download it from cemetech.net/downloads/files/1153/x1153 and then install it using the process described in this video.

Is that The images add in on the main menu next to Physium?

Yes, if I remember correctly, it is.

@@bongo50_ thanks you 🙏

@jxedn You're welcome. I'm always happy to help.

Yes there is. It's called KhiCAS. www.cemetech.net/forum/viewtopic.php?t=14888&start=0

Yes there is. It's called KhiCAS. www.cemetech.net/forum/viewtopic.php?t=14888&start=0

What about when the cable is plugged in? What happens then?

Firstly, this isn't the N64 version of Doom. This is based on the original PC version. The N64 version is a (very popular) port. Secondly, Doom is an old game and does not require powerful hardware. Thirdly, this version of the game is quite cut down. The sound files are all removed, textures are compressed and I only have the first chapter available to play. I'm also skipping every other frame.

It is dependent on how much memory you have available on the calculator. I was able to create a 38×38 square matrix, but you could make a bigger one if you deleted other things stored in memory.

You can't on this calculator. It's very annoying.

Oh

Yes. All of this is usable in exam mode. Just remember to show the necessary working to get all of the marks.

I tried it, to my sadness i muss downgrade my calculator version to play doom

Why's that? This should work on the fx-CG50

@@bongo50_ but it don't work with 03.80. it's simply shows me 0.0 mb.

I'm on 03.80.0202 and it works fine. Where does it show you 0 MB?

@@bongo50_ play other WAD (0.0 M) all add-ins are reject by reset 1. File read error

It's a must have in my opinion!

@@bongo50_I’m getting one soon aswell

Yes it is. May I ask for a few more details of your specific use case? What do you want to use the images for? Your answer will affect the exact method.

You can buy it from Amazon (example Amazon UK link: amzn.eu/d/4Om9lCT) or directly from CASIO (www.casio.co.uk/fx-cg50). Just search for "CASIO fx-CG50".

@@bongo50_ ok Thank you.

Those are the correct answers in radians. Were you expecting degrees?