mbbo Records

Normal Operation

Depending on the format type, different record fields are used for output and input. The variable x stands for the written or read value.

DOUBLE format (e.g. %f):

Not allowed.

LONG or ENUM format (e.g. %i):

If any of ZRVL ... FFVL is set (is not 0):

Output: x=RVAL&MASK
Note that the record calculates RVAL by choosing one of ZRVL ... FFVL depending on VAL and by shifting it left by SHFT bits.
Input: RBV=RVAL=x&MASK
MASK is initialized to NOBT 1-bits shifted left by SHFT. If MASK==0 (because NOBT was not set) it is ignored, i.e. x=RVAL and RBV=RVAL=x.

If none of ZRVL ... FFVL is set (all are 0):

Output: x=(VAL<<SHFT)&MASK
Input: VAL=(RBV=(x&MASK))>>SHFT

STRING format (e.g. %s):

Output: Depending on VAL, one of ZRST ... FFST is written. VAL must be in the range 0 ... 15.
Input: If input is equal one of ZRST ... FFST, VAL is set accordingly. Other input strings are not accepted.

Initialization

During initialization, the @init handler is executed, if present.