Hi Welcome to another Vintage Computer slash calculated a teardown. Very excited about this one. The FX 7:30 P I Had this one on my eBay watchlist for a while because you know I'm a scientific calculator fanboy. Check it out.

Not only does it have the all the basic computer stuff, it's actually got a scientific calculator built in. Yes, they all did, but this one has like the dedicated keys. you didn't have to do it through basic. so very excited.

and but I didn't get it from eBay I Got it from this guy? Yes. Filmed in front of a live studio audience you might recognize Scott the TIFF bomb. That's good if you don't know he's all the way from New Zealand even though yes, he is a bomb. Weird combination he lives in New Zealand somewhere.

Yeah and yeah, he dropped by the lobe to say hi and he bought this little baby. so let's take it apart. say bye Bramwell Lincoln Scott's channel down below you haven't seen it and at the end as well. Fantasy: Thanks! Scott Alright, let's have a look at this baby.

Let's well switch it on. Look at that still works after all these years. 1986 vintage and I don't think it had a long, a very long life. I think it was pretty much only produced for a year or two, then shut down.

The contrast on the screen is really good, but how many is that? Oh Like a what is it 24 character or something like that and can we? I haven't used it before? Scott Come on, tell me what beeps. It has a key beep noise execute right. So do we have to put in calculator mode? function Calc no better. learn now to use this thing on.

so it's not actually as good as the regular Cassio's didn't have. like the casio operating system, it worked more like a the visually perth perfect algebraic method the Vpm calculators. So if you wanted to do like a sign for example you couldn't just go 5 and then shift sign like that. it didn't work like that.

and to give you ooh error to you thank you very much you had to go of course didn't do it the visually perfect way and go sign and then space. you have to put the space which kind of I can't it add the space if it needs to space I Guess you could have put a bracket or something like that, but there you go. It would give you a direct result like that without having to. Actually you know, write a basic program to do it so you know it's really nice that I had you know your basic has got your logs and your square roots and all rights.

Even got the bloody Hyperbolic sin there as well. Hate the hyperbolic anyway. um yeah, it's all there. and you didn't have to use the basic programming language but it did have 8k building I don't know what version of the basic the Cassio's used was at some sort of Microsoft basic I Don't know did they have their own basic? I'd have to check that out that.

what is that? No idea what that is. Anyway, ran on to Cr2032 is in 1cr 12:20 that'd be the backup and 70 million watts for those playing along at home. So you get a decent battery life out of that baby. Let's crack it open, shall we? Very nice bit of 1986.

Tech Who that loved it? Check this out. It's got a couple screws up there, but then I know I thought that was like ah, no, that's a film is that? uh I think that's yeah. I think it's got a protective film on the back to prevent scratches. Maybe something like that spins like a champ.

Look at that. Fantastic. Let's see if we can turn it off. See.

Oh yeah, it's got the expansion header. by the way. I'm eight K of RAM that a BS Ram no this. D Ram rubbish.

and you could expand it with another 8k around. which probably cost you a fortune back in the day. And there we go. These things are there we go.

Ah, mooned. but nothing that and looks like we had that. That's know is that the memory expansion. This might be IO expansion.

This would be internal memory expansion. It just plugged in there and make contact. What did they do? They have pogo pins in the memory hard or something, perhaps. Hmm.

Anyway, there's our reservoir cap up there to store. Although it does have a battery. Yeah, does have a battery backup. These things are designed to be opened so that you can actually replace the oh no, There we go.

The operational bat. Yeah. Forgot to mention that the two operational batteries are in there. Your backup batteries in here and the reservoir cap would even provide a third method of storage because if you wanted to change your backup battery, you needed these two to be fresh.

Otherwise, you lose your contents. Or if you, of course if you're changing your main batteries, then this one has to be good. Otherwise, you lose your programs because it had no way had no storage unless there was some sort of external storage facility. But a great lead out there was on this model and as a last ditch effort, you'd probably get you know a few tens of seconds from your reservoir cap or something like that.

Anyway, let's try and get in further. Still don't know what that is our that's got to be a bill clip. It's at a belt clip. You wear this baby around on your belt or some nice little spring you there to connect to the back panel for some shielding.

But you know you've got to wonder why they bother. I Mean, what's there I Know it. work at it. It may be it might work at 500 kilohertz or something like that might scream along at that extreme processor clock rate.

But anyway, um so you wouldn't have think wouldn't have thought there would be a huge requirement at the low power and low frequencies that were operating. its side this thing. But anyway, nice attention to detail. So good thing about these is that they came apart really easy.

Actually, it's got two of those little things. Why do they bother having two? with two? you could actually have a back plate removal detection thing if you wanted to. Maybe they did. Maybe it.

I don't know. Who knows. Anyway, Ah, missed another screw. seems.

just got it. Where is it? Like doesn't screws to get this damn thing here we go. I'm gonna be in like Flynn shortly. Tada, you're yet Myrin Here's a little buzzer.

Tada: Hitoshi Drivers: They were the Ducks guts and the industry standards. what you expect to find for the LCD So that'll be multiplexed. Of course, because of all the dot matrix segments, we've got a Fairchild job in here. I have to zoom anymore.

I got a 4k camera zooming in the Edit Um, what's that? a 64? H 440? Don't know Scott Any idea. Shh Nope and you got eight KS RAM That's it. A couple of test points and oh yeah, there it is. 62 64 Absolute classic and you've got to have a four.

I've gotta have some 4000 series CMOS in there, 407 1 and the external connector. That's about all she wrote. a bit of diode switching there for the batteries and there's going to be one up there too for the yes RAM because I You don't want them powering the whole thing, you just want the battery backup of course powering the SRAM So we've got some diodes steering there for the batteries and oh, got some tents on there. Um, but that's about all she wrote.

She's not much in it, Is it? Pretty quick teardown? Ok, let's do some three-handed flippity doo-dah here. And what's on the bottom? Not much, That's it. We just got your standard standard membrane keys nothing special membrane sheet and straight onto while the contacts and that's all she wrote. PCB Contact power switch, sliding switch standard fare for the time, but that's about all she wrote on that meet.

Yeah, standard Casio Calculator construction for the time. nothing fancy, just standard fibreglass PCB and surface mount parts. all off-the-shelf stuff. No worries about the only custom thing as the you know, the flat flex LCD and stuff like that.

the rest of it unless of course so you know role in their own processor in there, but that could just be a mask processor or something like that. We're not sure that's pretty close to Deaf Palm. Deaf Em. Hmm.

Have you told the history of Deaf Palm? Scott Not publicly, No, not publicly. Would you like to? Oh no, that's all right. it's secret. It's a secret.

And no, he's not deaf, trust me. But he is a palm. He's a palm. I Can vouch for that pomme.

end in New Zealand What a weird combo. Anyway, we can disable that buzzer. Check it out. This bad boy also had rectangular to polar and rectangular and polar conversions, combinations, permutations, fantastic end, and engineering key that worked directly on the result as well.

So if we just put in a exponent like that and then hit the engineering key, there it is will that Bobby does luck. Whoa. geez Angolan way all the way with LBJ he dissing what places did we get on Pi? Oh come on. if we actually go mode wrt.

this shows us. we've got these different program modes p0 through to P9. so 10 different programs presumably that we can put into this bad boy that's showing our memory remaining. All right.

Please excuse the crudity of this video I didn't have time to build it to scale or to paint it. What we're gonna do is run a simple program in this thing. So what we'll do is we'll just go reset all on the back there and this stupid Logitech webcam would focus on this thing. actually said manual focus.

Ridiculous. Anyway, Ready! P0: We're ready to go so we can actually go into our sorry mode 1 here and 7520 bytes. that's how much what memory space we've got left. And we've got these 10 program modes so we can just go shift p0 program mode to select that and then we just go typing in program so we can do 10 space C equals C plus 1.

Let's do something simple and then we can go 20 space I Know I could probably don't have to type that in. There's probably a Shift key for it somewhere. Print I don't know? is there like if then else return Gosar. Print there it is there it is.

Print C and 30 space go to 10. Hugely complicated a program and I Love it how it updates the how much memory you got left. total that 30 go to 10. Terrific.

And then if we want to So now we're in like we're in like Flynn right and we can list that so there's our program. There you go and we can go into you can see that's got where is it Mode 0 is run so we're in the mode 0. Like that, can we run it execute. Unfortunately it's not going to just spin through the numbers because this thing only has one line display.

When you print something it's going to make sure you see it so it actually as a as a like a feature it actually stops and waits for you to actually do that same. If you like input you want to input a number or something like that it'll come up. So yeah of course if we had a program that would run all the way through then that'll be fine if we didn't have print. But every time it executes that print instruction, it waits for you to press execute like that.

So there you go That is a basic program and no pun intended on the casio. FX 7 30p So thank you very much Scott for us sending that one in. It's an absolute classic and I'd like all the scientific funk I Just love it having all the scientific functionality. It's even got hex on here, but it does doesn't really have proper probably could I remember mid dollars fantastic string-length Val Anyway, it had like scientific capability without having to write a basic program.

just kind of like just you know, single line execution kind of thing. So that was. that was really quite neat. So this calculator probably would have been the Ducks guts back in 1987 I think it came out so hands up if you had one ends up you still have one.

If it's your daily confuse her that you're using, let us know you still you. anyone's still using like a a pocket basic programmable calculator like this on a daily basis? let us know. Anyway, thank you very much Scott The Def Pom for sending that in. You may have seen Scott on my channel before he did one of my like a featured video.

It was really cool doing a calibrator repair. That was a fantastic video and I'll link in Scotts deaf Pom channel at the end. Definitely check it out. catch you next time.