Keyboard Controls

For faster operation of the Curta you can use single or multiple key commands.

Some more advanced options are only available as keyboard commands.

Notes:

There is a timeout between the first and second key of a multi-key command:
If you are too slow the command is ignored.
You can use lower case, upper case or a mix: YACS is not case sensitive

key(s)	action	remarks
MR	Machine Ready	Clear and Reset the Curta
Enter	Start a Crank Cycle	At same speed as previous crank cycle
C1	Crank very fast
C2	Crank fast
C3	Crank slow
C4	Crank very slow
1..6	Turn Carriage	1 = units, 2 = tens...
A	Add Mode
S	Subtract Mode
TI	Turns Counter Increment Mode	Cranking once (in add mode) increments the turns counter
TD	Turns Counter Decrement Mode	Cranking once (in add mode) decrements the turns counter
CX	Clearing Lever eXpand	To expand (fold out) the clearing lever
CF	Clearing Lever Fold	To Fold-In the clearing lever
CR	Clear Results	Only possible if clearing lever extended
CT	Clear Turns Counter	Only possible if clearing lever extended
CS	Clear Setters	Clears the settings on the setting levers
EX	Start Exploded view mode
IM	Implode the Curta
X1	Strip the Curta	Show only the essential parts
X0	Restore the Curta	Show all parts
BS	Background Color Setters: Show
BH	Background Color Setters: Hide
OS	Outside Show	Cover is always visible
OH	Outside Hide	Cover is never visible
OA	Outside Automatic	Cover to automatic mode: Show/Hide depends on distance
FT	Fog Toggle	Toggle the Fog On/Off
FI	Fog Increase	More Fog - (only possible is Fog is On)
FD	Fog Decrease	Less Fog - (only possible is Fog is On)
FL	Fog Linear	Linear increase in blending: for depth cueing effect (only possible is Fog is On)
FE	Fog Exponential	Exponential increase in blending: for more natural fog (only possible is Fog is On) Note: Only available if the VRML viewer is using Open GL