CASIO 3-pin cables
CASIO uses special 3-pin cables. This post from Casiopeia describes how to build your own; here, we’ll focus on the existing ones.
On Microsoft Windows, the proprietary CASIO software (typically, FA-124)
requires the cable drivers to create a
COM* (1 to 20) device.
All of the cables also require you to install the serial cable driver manually.
Once installed and plugged-in, to know what virtual COM port the serial
adapter occupies, you shall use the device manager — it’ll usually be in
the “COM and LPT ports” category.
On GNU/Linux, it all works directly and usually creates
devices that you can interact with, although you’ll need to be in the group
allowed to manage them (usually
uucp, but that depends on the distribution
The SB-62 cable is the official calculator-to-calculator cable from CASIO. It is usually provided with the fx-7400GII calculator and above.
SB-88 and SB-88A cables
The SB-88 and SB-88A cables are the official PC-to-calculator cables from CASIO. It costs around 50€ (which is bloody expensive if you want my opinion).
They are distinguished by the presence of the ‘A’ at the back. I don’t know what the differences between them are (they both use the same USB Vendor & Product ID). The driver for both has been found by several people during the same person; this TI-Planet news sums this up.
To install and use these cables on Microsoft Windows®, see this tutorial.
Here’s a TI-Planet news describing how the cable is produced by MCT Components, and here’s [the driver for MS-Windows][sb88_drv].
Util Pocket cable
Util Pocket is just a maker on the Internet which made his own PC-to-calculator cables during the CAS50/CAS100 era. You can buy one here for ~25€.
This cable uses an FTDI chip. You can download the drivers for MS-Windows here. You’ll have to extract the archive contents in a separate folder, then go to the device manager, right-click on the unknown cable, find the drivers, and set, in the folder where you extracted the archive contents, the subfolder corresponding to your operating system as the search folder.