How do I Downgrade from OS 2.09 to 2.04?
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- toml_12953
- Junior Member
- Posts: 13
- Joined: Wed Sep 21, 2016 7:41 pm
- Calculators: Casio Afx 2.0, Casio fx-9860G SD
How do I Downgrade from OS 2.09 to 2.04?
I have an fx-9860G II SD Power Graphic 2 that came with OS 2.04. The first thing I did was to "upgrade" it to 2.09. It won't run Edit 1.60. I don't know if 2.04 can run that editor but I'd like to try it. The 2.04 upgrade won't let me install it because my current version is later. Is there a way to bypass the version check in the installer or otherwise get around the limitation?
Thanks,
Tom L
Thanks,
Tom L
- Ford Nucleon
- Junior Member
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- Joined: Sat Jun 03, 2017 12:06 am
- Calculators: Casio fx-9860GII
Re: How do I Downgrade from OS 2.09 to 2.04?
Did you find a way to downgrade?
- SimonLothar
- Senior Member
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- Joined: Sat Sep 15, 2012 6:59 am
- Location: Krautland ****
- Calculators: Casio fx-7400GII, Casio fx-7400GII (SH4), Casio fx-9750GII, Casio fx-9750GII (SH4), Casio fx-9860G, Casio fx-9860G SD, Casio fx-9860G Slim, Casio fx-9860GII SD, Casio fx-9860GII SD Power Graphic 2, Casio Classpad 330 plus, Casio fx-CG20, Casio fx-CG50, Casio Classpad fx-CP400
Re: How do I Downgrade from OS 2.09 to 2.04?
The Edit 1.6 problem has been solved here.
In case of this SH-3/SH-4A problem, a downgrade would not have been helpful.
In case of this SH-3/SH-4A problem, a downgrade would not have been helpful.
I'll be back!
- Ford Nucleon
- Junior Member
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- Joined: Sat Jun 03, 2017 12:06 am
- Calculators: Casio fx-9860GII
Re: How do I Downgrade from OS 2.09 to 2.04?
I wanted to downgrade for a different reason as my calc won't run most of my games now. Is there a way?
- SimonLothar
- Senior Member
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- Posts: 605
- Joined: Sat Sep 15, 2012 6:59 am
- Location: Krautland ****
- Calculators: Casio fx-7400GII, Casio fx-7400GII (SH4), Casio fx-9750GII, Casio fx-9750GII (SH4), Casio fx-9860G, Casio fx-9860G SD, Casio fx-9860G Slim, Casio fx-9860GII SD, Casio fx-9860GII SD Power Graphic 2, Casio Classpad 330 plus, Casio fx-CG20, Casio fx-CG50, Casio Classpad fx-CP400
Re: How do I Downgrade from OS 2.09 to 2.04?
The reason for addin-incompatibility often is the MPU. You cannot fix that with OS downgrading.Ford Nucleon wrote:I wanted to downgrade for a different reason as my calc won't run most of my games now. Is there a way?
Some time ago, I did downgrading with CASIO update-packages. Instead of following the official instructions and using the OS updater, I used the bootcode-updater. The bootcode-updater does not care for the version of the actually installed OS. Following this way I just downgraded my fx-9860GII (SH-4A) from 2.09 to 2.04. I did not encounter any problems.
I'll be back!
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