14 replies to this topic

[Doomed One]

First, let me say hello to everybody, since this is my first time posting here
Second, let me ask for your help:
Yesterday I decided to implement the guide on these forums to "upgrade" my FX 1.0 Plus to AFX 2.0; I did every step, everything worked fine, but after transfering the system file with FlashCOM, I noticed that everytime I tried to receive a file, I got an error message ("Receive ERROR", in the calculator).
I attempted a reset, it cleared the CAS, Algebra and TUTOR icons from the menu, but the problem persists...
I am a newb and have no idea of what to do Can someone help me?
Thanks in advance

[Andy.Davies]

can you transfer other add ins to the calc using FlashCOM ?

[Doomed One]

I can't transfer anything:(
I tried a system file, I tried "Physium" from Casio's official website and I tried uploading the system from the calc; It all failed:( Ah, and not only it fails with FlashCOM but also with CASIO Add-in instaler:(
It's a desperate situation...

[Andy.Davies]

Did you build your cable or buy one?

if you bought one, is it an 'offical' one of the MAX232 circuit?

[Doomed One]

I bought it, it's an official one from Casio; it doesn't have any information on the circuit type, but it's model number is SB-87-w. I think it's a cable for the Algebra FX 2.0, but the store clerk said it should work just fine on a FX 1.0
Can it be a cable problem even thought I managed to transfer files once?
Once again, thanks for helping me

[Andy.Davies]

hmm...so the cable probably isnt at fault, but we can test it if the next few steps dont work

which serial port are you using? some peoples cables only work on COM1
is the cable properly plugged in at both ends?

[Doomed One]

I'm sure it's COM1 it's linked to... because when it worked it this was the selected port and also because I get the error the moment I push the send button on the computer... it's well pluged in, nothing changed since the first time...
I think the signal is getting into the calculator, but it is somehow "refusing" it... I don't know how that's possible, though
This is troublesome, specially since I don't have the 120? to buy a new calc at the moment... hope this new information helps

[Andy.Davies]

well we can test you cable then

do you have Hyper Terminal Installed?

( Start - All Programs - Accessories - Communication - Hyper Terminal )

[Doomed One]

Yes, I have that program installed.
What must I do?

[Andy.Davies]

Heres part of a guide i wrote a while ago:

START >> PROGRAMS >> ACCESSORIES >> COMMUNICATIONS >> HYPER TERMAINAL
if it is not there than grab you windows cd and install it!

loadup hyperterminal and a new connection dialogue box should appear, if it does not the click on FILE >> NEW CONNECTION


1. give the connection a name e.g. CASIOTEST
2. select an icon
3. in the connect to dialogue box find the drop down menu labeled CONNECT USING and select the comm port you have attached the PCB to (usually comm 1, unless your mouse is plugged in there)
4. Press OK
5. select the following Values in the COM1 PROPERTIES box:
* Bits Per Second: 9600
* Data Bits: 8
* Parity: none
* Stop Bit: 2
* Flow Control: none
6. try typing somthing, nothing should appear, if it does check your circuit again
7. now connect the TIP and MIDDLE of the 2.5mm jack plug together
8. try typing somthing again, if what appears on screen is what you typed the you have successfuly sent and recived data.

[Doomed One]

I tested it with a multimeter (the only closed circuit I could find arround the house )
I put one of the leads in the top and the other in the middle, typed some text and nothing apperead on the screen; furthermore, the multimeter reported no flow of current; it did report it when I connected the bottom part with the tip of the 2.5 mm jack plug, 4.33 Volts, but no text showed up on screen.
Does this mean my cable's toast? If so I can return it, I bought it recently...

[Andy.Davies]

the multi meter may not have worked as a closed circuit, or as you have dedused, the cable is fried

[Doomed One]

I found some TV coaxial cable lying arround, cut about 20 cm and tested it; didn't work either.
I guess it's time to get a new cable then... Thanks for your precious help
By the way, any advice on how to prevent my cable from frying next time? 'cause I only used it two or three times...

[Andy.Davies]

well i dont know why it fried this time have you tried using it ina different port on your pc btw?

[Doomed One]

Nope... I'll try on my brother's computer, my motherboard has always been kinda fragile
I'll probably have to return my cable, but am just glad it's not the calculator...
Once again, thanks for your help