VALUE - as in Forth2012

[mitra42]

Forth2012 has VALUE instead of USER which fits in as follows

Type	Initialized	Definition	Fetch	Store
VALUE	Y	11 VALUE bar	bar	22 TO bar
CONSTANT	Y	11 CONSTANT bar	bar	N/A
VARIABLE	N	VARIABLE bar	bar @	22 bar !
USER	Y	offset USER bar 11 bar !	bar @	22 bar !

This is going to cause issues as move to multitasking, but USER has to be restructured then anyway

[mitra42]

Design outline ...

• Define structure
• Think through this._USER and put in USER variable itself
• Define tokenValue - like tokenUser with extra fetch
• (if reqd) Function tacked onto BuildUser that creates structure instead of tokenUser, depending on some flag
• Function VALUE() as Forthable replacable function - if reqd
• TO needs to store using >BODY, >BODY needs extending to cover indirection to user area
• Replace USER with VALUE as Forth function
• Go through code and replace in buildUser, other places _USER or USER are used, also check on uses of VARIABLE
• Port Arduino (flagged in code)

[mitra42]

• Structure: tokenValue offset in ROM - one cell of user space
• _USER becomes Ufetch(0)
• Simple for now - if weren't using UserArea then we'd probably need to link them and store an initiation value