Try this:

For "100" in turbo mode, and "66" otherwise, you want the following jumpers installed:

Middle: H2
Top row: A3, B2, C3, D3, E3, F3, G1
Bottom row: (same as top)

HwAoRrDk wrote on 2026-05-09, 20:31:

For "100" in turbo mode, and "66" otherwise, you want the following jumpers installed: […]
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For "100" in turbo mode, and "66" otherwise, you want the following jumpers installed:

Middle: H2
Top row: A3, B2, C3, D3, E3, F3, G1
Bottom row: (same as top)

Thank you very much, this worked perfectly. I still have no idea how it corresponds to what it displays/how you determine where to place the jumpers.. hehehe

Choppo51 wrote on 2026-05-10, 10:08:

I still have no idea how it corresponds to what it displays/how you determine where to place the jumpers.. hehehe

It's not that complicated. 😀 It just looks intimidating at first blush.

The alphabetic letters correspond to the individual segments of the display digits, with each row controlling one digit. For each segment you have 4 choices: never lit, lit only in non-turbo, lit only in turbo, or always lit regardless of mode. Each segment is associated with a 'T' shape, with the letter in the centre, and you can place a jumper between the centre pin and one of the 'branches' of the 'T' to make the choice (or leave the jumper off entirely).

It helps to look at it the following way:

Figure out which segments are common to both non-turbo and turbo modes - those are "always on" (position 3). Then figure out which segments are never on in either mode - those are "always off" (no jumper). Then figure out which are on only in one mode or the other (positions 1 or 2).