Stack/Register Functions

Function Key Description
ROL Roll the stack down. The contents of the stack are rolled from top to bottom (and wrap around to the top).
R up Roll the stack up. The contents of the stack are rolled from bottom to top (and wrap around to the bottom).
X:Y Exchange X and Y. Exchange the values of the X and Y registers.
CLx Clear the X register. The contents of the X register are set to zero.
LSTx Last X. The previous contents of the X register are placed into the X register.
STO Store. Store the value of the X register into a "storage register". This is a "two part" function which requires a single digit [0-9][A-F] as an argument or a single digit and the decimal point [.0-.9][.A-.F]. The argument is the "name" of the register to receive the value.
RCL Recall. Recall the value from a "storage register" into the X register. This is a "two-part" function which requires a single digit digit [0-9][A-F] as an argument or a single digit and the decimal point [.0-.9][.A-.F]. The argument is the "name" of the register from which to get the value.
Clear REG  Clear registers. Clears all "storage registers". All registers are set to values of zero.