CVs 67 to 94 - Programmable driving curve in 28 speed steps.
Default 1 - 255
This function is switchable in CV29, bit 4 (value 16 for on, 0 for off).
If selected in CV29, this range of CVs enable you to create your own sequence of speed steps. You can have your loco accelerate quickly through a few early steps and have greater control of the top end or the reverse for shunting maneuvers. Or anything else that takes your fancy.
Defaults are. CV67 = 6, 68 = 8, 69 = 10, 70 = 13, 71 = 16, 72 = 19, 73 = 22, 74 = 26, 75 = 31, 76 = 36, 77 = 42, 78 = 48, 79 = 54, 80 = 60, 81 = 68, 82 = 76, 83 = 84, 84 = 92, 85 = 102, 86 = 112, 87 = 124, 88 = 136, 89 = 152, 90 = 168, 91 = 188, 92 = 208, 93 = 228, 94 = 232.
These settings will not 'reset' with the reset command - CV 7.
Note that CV94 is not set to the maximum value of 255 (see CV5 for reason)