I got this photo from Chinese online shop selling it for 680 Yuan (I think it's about $100). That's expensive indeed.
All I know about the 7400GII is:-
- It's very physically similar to fx-9750GII. The only known hardware difference is 7400GII has no USB port.
- Screen resolution is 128x64 instead of 80x48 in 7400G+. ( at last)
- Possibly uses RENESAS SH7355 cpu.
- Works off 4 AAA batteries with 0.35w power consumption. (not 2 AAA 0.05w anymore? )
- Command catalog with Shift' /> 4' /> . (Yes! )
- Memory capacity: 20 Kb. Why!?!?
- Cut down OS's functionalities from fx-9750GII's are:- no matrix support, no dynamic graph, recursion, conics, TVM and E-CON-2 menus, some or all advanced stat features were cut too. Beside these, it has all the functionality of 9750GII (complex number, string function, equation solver, more graph types, etc.).
As you can see, the 7400GII, now using a new case that is identical to 9750GII's and 9750GA+'s, should not be called "Mini Graphic" anymore.
I think the memory was just clipped to 20kb by the OS (real hardware should be 256k?), and for no-USB, why? of course, to prevent you from converting it to 9750GII using OS flashing.
This calculator is apparently a USB & some major functionality cut down version of fx-9750GII. Likewise, the fx-9750GII itself is a cut down version of fx-9860GII (no flash memory, add-in support, backlight and less functionality). You can see that all GII models, using RENESAS SH7355 cpu (newer than SH7291 in Classpad, more features?), are very advanced in hardware compare to previous models. All that classify each model and prevent them from being similar, beside those extra hardware differences, is their OS. It will be useless converting 9750GII to 9860GII because it has no flash memory and you can't do any flashing to 7400GII because it has no USB port. Someone may write a program to copy the content of 9750GII's ROM and do flashing it into 7400GII via its program-link port to convert it to fx-9750GII, who knows.
Edited by Vinx, 24 October 2009 - 05:52 PM.