The BBC and Master Computer Public Domain Library

AB49 VAL

Submitted by Steve Fewell

Description:

Call the Evaluate value routine (&AD36) which will evaluate the next value at BASIC text
pointer B location, or the expression at that location if the value begins with an open bracket ("(").
If the obtained value is not a String (A is not 0), then the value is already numeric, so generate a
type mismatch error.

Otherwise, continue to the ASCNUM (ASCII String to Binary numeric Value conversion) routine (&AB4E).
This routine will return a the Binary equivalent of the ASCII value in either the IWA (if Integer) or FWA (if float)
storage locations.

Disassembly for the VAL routine