It may not be an FK-2001 but a diff *-2001. Can you check the back for a label ? It should give some more info like an FCC ID # to help find things more easy.

That looks like an FK-5001 variant A, not 2001 (despite the logo). I have a very similar one (variant B instead) I am typing on now. Difference is no 2001 logo or dipswitch, and the LEDs are integrated into the lock keys (very cool) instead of a set along the top, see: https://deskthority.net/wiki/Focus_FK-5001

Mine was new in (utterly dilapidated) box, and unfortunately didn't contain any manuals. You're not the first to ask here, but haven't seen any answers: Focus FK-5001 programming / manual

That first link does have a description of the Turbo functionality:

The built-in desk calculator with LCD is independent of the computer and is powered by a separate button cell battery. One or two keys above the numeric keypad switch between the numeric keypad and calculator functionality. The additional calculator keys do not generate scan codes, preventing them from driving a software calculator on the attached computer.

The key repeat rate can be set using the "Turbo" key in combination with the function keys, e.g. Turbo+F1 sets it to 2 characters/second and Turbo+F12 gives 130 characters/second.

Unfortunately I'm not seeing this having any effect on my keyboard, but that may be related to how I have it hooked up (connected via PS/2 to USB adapter to a Win11 system)

dionb wrote on 2025-02-28, 11:44:

That looks like an FK-5001 variant A, not 2001 (despite the logo). I have a very similar one (variant B instead) I am typing on […]
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That looks like an FK-5001 variant A, not 2001 (despite the logo). I have a very similar one (variant B instead) I am typing on now. Difference is no 2001 logo or dipswitch, and the LEDs are integrated into the lock keys (very cool) instead of a set along the top, see: https://deskthority.net/wiki/Focus_FK-5001

Mine was new in (utterly dilapidated) box, and unfortunately didn't contain any manuals. You're not the first to ask here, but haven't seen any answers: Focus FK-5001 programming / manual

That first link does have a description of the Turbo functionality:

The built-in desk calculator with LCD is independent of the computer and is powered by a separate button cell battery. One or two keys above the numeric keypad switch between the numeric keypad and calculator functionality. The additional calculator keys do not generate scan codes, preventing them from driving a software calculator on the attached computer.

The key repeat rate can be set using the "Turbo" key in combination with the function keys, e.g. Turbo+F1 sets it to 2 characters/second and Turbo+F12 gives 130 characters/second.

Unfortunately I'm not seeing this having any effect on my keyboard, but that may be related to how I have it hooked up (connected via PS/2 to USB adapter to a Win11 system)

Here's a photo of the back. It unfortunately doesn't have anything but a serial number, and "made in taiwan r.o.c."

Thanks for the info, I'll give it a shot next time I have in plugged in for the turbo.

I should have noted too that my keyboard has an AT keyboard connector, and the dip switch settings on the back read the following options:
PC/XT
Enhanced XT
PC/AT
Enhanced AT, PS/2

That is WEIRD that it does look very similar to the 5001, but I also know that I have never had any other keyboard like this and the logo pad has never been replaced. That's very odd. Maybe a late revision 2001?

And yeah, the keyboard calculator is easy enough to use, just use "KB Lock" and "Cal Lock" to switch back and forth. Although I wish it started up in "KB lock" mode.