Upgrade Graph 25+Pro/35+/85 / fx-7400GII/9750GII/9860G/GII

→ **MyCalcs** profile · by **critor** » 08 Feb 2017, 19:38

Preliminary checks and steps :

P0) Supported models :
Check you have one of the following Casio models :
- fx-9750GII
- Graph 35+/35+E/75/75+/75+E/95/85(SD)
- fx-9860G(SD)
- fx-9860G Slim/AU/AU+
- fx-9860GIIs
- fx-9860GII(SD)
- fx-7400GII SH3
- Graph 25+Pro SH3
If it's the case, you may upgrade it by installing an OS targeting a superior model in this same list !

If you have an fx-7400GII / Graph 25+Pro, check its processor type.
SH4 fx-7400GII / Graph 25+Pro models can neither been upgraded nor updated.

P1) Choose your OS upgrade :
Recommended and compatible OS upgrades :

model name	fx-7400GII SH3	fx-9860G Slim	fx-9860G fx-9750GII/9860GII SH3	fx-9860GIIs fx-9750GII/9860GII SH4
french name	Graph 25+Pro SH3		Graph 85 Graph 35+/75/95 SH3	Graph 35+E/75+/75+E Graph 35+/75/95 SH4
australian name			fx-9860G AU	fx-9860G AU+
compatible upgrades	fx-9750GII SH3 / Graph 35+ SH3	specific patch	any SH3 OS	any SH4 OS
best upgrade	Graph 35+ 2.01 (exact calc)	fx-9860GII / Graph 75/95 2.04 SH3 to patch (exact calc + vectors)	fx-9860GII / Graph 75/95 2.04 SH3 (exact calc + vectors + apps support + 1.5MB storage)	Graph 75+E 2.05 (exact calc + vectors + french exam mode)
other upgrades (if regulations don't allow you the best)	fx-9750GII 2.01 (no exact calc)	fx-9860G Slim 2.00 (no exact calc + no vectors) fx-9860G Slim 1.11 (no exact calc + no vectors + no conversions)	fx-9860GII / Graph 75/95 2.08 (no vectors) fx-9860G / Graph 85 2.01 (no exact calc + no vectors)	Graph 75+E 2.09 (no vectors + french exam mode) fx-9860GII 2.09 (no vectors + generic exam mode) fx-9860GIIs 2.09 (no exact calc + no vectors + generic exam mode + no conversion)

If your model name appears in both last columns, then you have to determine its processor type.

About the different exam modes :

French exam mode : no expiration, elapsed time cannot be checked, PRGM application not disabled
Generic exam mode : 12 hours expiration, elapsed time can be checked with
```
ALPHA
```
```
(-)
```
, PRGM application disabled

P2) Elements needed :
- a PC running Windows XP or newer
- the right calculator to computer link cable :
  - if your calculator has an USB port, usually on the top-left corner as pictured, its USB(A)↔mini-USB(B) cable
  - if not, you'll have to use the mini-Jack 2.5 on the top-right corner, and will require a compatible USB(A)↔mini-Jack2.5 interface
    (for example, http://www.util-pocket.biz/catalog/prod ... cts_id=424 )
P3) Computer setup :
If not already done, download and install the FA-124 linking software.
This is going to install the calculator drivers too.

A) Get the OS upgrade image :

Get an image of the OS you'd like to upgrade to either from the Internet, or from a real calculator already running it.
In the later case :

borrow the calculator running the OS you'd like to upgrade to for some time
choose and download the appropriate backup tool :
- fxBackup205 if you have an SH4 calculator with Boot Code 2011.0531.1709
- if not, fxBackup204 if your OS version is 2.04 or higher
- for all other cases, original fxRemote 2.03
If needed, check your Boot Code.
right-click the downloaded zip file to extract its content to a real computer folder, and go into that folder
launch the right tool
connect the borrowed calculator to the computer
put your calculator in OS Error mode
click the Backup button in the tool window, type the file name and confirm
once the backup has completed, press the restart/P button on the back of the calculator

B) Patch the OS upgrade image for your model :

download the polyOS tool
right-click the downloaded zip file to extract its content to a real computer folder, and go into that folder
drag and drop your OS image on the polyos.exe file in that folder
This should create in the same folder :
- if supported, a file with the 2M suffix for an fx-7400GII / Graph 25+Pro/25+E calculator
  In that case, the OS being bigger than the model ROM, the tool may prompt you for the non-english languages you'd like to keep on the calculator.
- a file with the 4M suffix for all other calculators

C) Prepare the computer to flash :

download and choose the appropriate fxRemote 2.03 flashing tool :
- fxRemote2M4M if you are attempting to upgrade a fx-7400GII / Graph 25+Pro calculator
- if not, fxRemoteE205 if your have an SH4 calculator with Boot Code 2011.0531.1709
- for all other cases, the original fxRemote
If needed, check your Boot Code.
right-click the downloaded zip file to extract its content to a real computer folder, and go into that folder
if your calculator has an USB port, now just run the right fxRemote
if not, you need to identify your interface cable COM port :
- start by listing your currently available COM ports :
  - be sure your interface cable is disconnected from the computer
  - launch the right fxRemote tool
  - in the cable zone, select the 3Pin option
  - if the option is greyed out, then your currently have no COM port
    if not, note the available COM ports in the then appearing drop-down menu
  - close fxRemote
- now connect your interface cable to the computer
- relist the now available COM ports :
  - relaunch fxRemote
  - in the cable zone, select the 3Pin option
  - note the available COM ports in the then appearing drop-down menu
  - close fxRemote
- you should have found 1 additional COM port - that's your interface COM port, just select it
if you are attempting to upgrade a fx-7400GII / Graph 25+Pro calculator, check the "Recover Main memory backup area" option

D) Prepare the calculator to be flashed :

Put your calculator in OS Error mode.

E) Reflash the calculator :

in the fxRemote window, click the Recover button, and specify the right 2M/4M postfixed patched image.
Confirm the process.
Once and only once the process has completed and that the calculator has restarted and is back to the applications menu, press the restart or P button on its back.

- end of the tutorial -

Annex :

CPU type check :Go to top

type
```
MENU
```
, then go into the SYSTEM application
type
```
F4
```
to get the system version
You should have the version string displayed as XX.XX.XXXX, with a digit in place of each X.
Look at the last digit, thus the 8th one with this format :
- If it's a 0, then you have an SH3 model.
- It it's a 1, then you have an SH4 model.

Boot Code check :Go to top

turn the calculator off
press and hold
```
OPTN
```
```
x10^x
```
on Graph models, or
```
OPTN
```
```
EXP
```
on fx- models
without releasing these 2 keys, press and hold
```
AC
```
You should get a DIAGNOSTIC MODE popup
now release all 3 keys
type
```
F1
```
and then
```
9
```
You should now get the diagnostic menu
type
```
4
```
You should now get 2 datestamps, a DateO one, and a DateA one. The DateA one is your Boot Code datestamp.

OS Error mode :Go to top

To put your calculator in OS Error mode, depending upon your model :

generic model name	fx-7400GII / fx-9750GII / fx-9860GII/GIIs	fx-9860G / fx-9860G Slim
french name	Graph 25+Pro/25+E/35+/35+E/75/75+/75+E/95	Graph 85
australian name	fx-9860G AU+	fx-9860G AU
	press and hold the restart button on the back without releasing it, press and hold the F2 4 AC keys without releasing these 3 keys, release the restart button now only release the F2 4 keys together wait a second now finally release the AC key press and hold the 9 key wait a second release the 9 key press and hold the × key You should now get the OS ERROR screen. release the × key	turn off calculator insert a conductive long item like an unpainted paperclip in the hole on the back near the P button to close the internal P104 jumper while keeping the P104 jumper closed, press and release the P button on the back (notice : you may need more than 2 hands...)

→ **MyCalcs** profile · by **parrotgeek1** » 08 Feb 2017, 20:28

Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

→ **MyCalcs** profile · by **critor** » 08 Feb 2017, 20:37

parrotgeek1 wrote:Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

Thank you.

2.09 is SH4 only and so won't work on the fx-9860G Slim.
You need an SH3 OS.

→ **MyCalcs** profile · by **parrotgeek1** » 08 Feb 2017, 20:48

critor wrote:
parrotgeek1 wrote:Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

Thank you.

2.09 is SH4 only and so won't work on the fx-9860G Slim.
You need an SH3 OS.

I meant 2.08

→ **MyCalcs** profile · by **critor** » 08 Feb 2017, 20:53

parrotgeek1 wrote:
critor wrote:
parrotgeek1 wrote:Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

Thank you.

2.09 is SH4 only and so won't work on the fx-9860G Slim.
You need an SH3 OS.

I meant 2.08

Ok. 2.08 hasn't been patched for the fx-9860G Slim different keys matrix.
You'd need to RE the currently available 2.04 patch and adapt it for 2.08.

Anyway, 2.04 is better than 2.08.
2.08 is removing the vectors support added with 2.04 (to comply with IB regulations), and thus is similar to the old 2.01.

→ **MyCalcs** profile · by **parrotgeek1** » 08 Feb 2017, 21:59

critor wrote:
parrotgeek1 wrote:
critor wrote:
parrotgeek1 wrote:Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

Thank you.

2.09 is SH4 only and so won't work on the fx-9860G Slim.
You need an SH3 OS.

I meant 2.08

Ok. 2.08 hasn't been patched for the fx-9860G Slim different keys matrix.
You'd need to RE the currently available 2.04 patch and adapt it for 2.08.

Anyway, 2.04 is better than 2.08.
2.08 is removing the vectors support added with 2.04 (to comply with IB regulations), and thus is similar to the old 2.01.

OK.

(Why does this forum nest quotes infinitely? Can there be a limit?)

Have you looked at my 4.4 patches yet?

→ **MyCalcs** profile · by **critor** » 09 Feb 2017, 00:29

parrotgeek1 wrote:
critor wrote:
parrotgeek1 wrote:
critor wrote:
parrotgeek1 wrote:Thanks! I was actually writing a tutorial because I couldn't find one in English. Do you happen to have 2.09 for Slim?

Thank you.

2.09 is SH4 only and so won't work on the fx-9860G Slim.
You need an SH3 OS.

I meant 2.08

Ok. 2.08 hasn't been patched for the fx-9860G Slim different keys matrix.
You'd need to RE the currently available 2.04 patch and adapt it for 2.08.

Anyway, 2.04 is better than 2.08.
2.08 is removing the vectors support added with 2.04 (to comply with IB regulations), and thus is similar to the old 2.01.

OK.

(Why does this forum nest quotes infinitely? Can there be a limit?)

Have you looked at my 4.4 patches yet?

No, not yet. I'm very busy this week. Believe it or not, I haven't changed anything to ControlX 4.4.1 since last week-end.
Even this Casio tutorial + the required polyOS v2 tool are just things already developed weeks ago.