INT 61 - Atari Portfolio - FORMAT INTERNAL DISK                                 
	AH = 09h
	BX = desired size of disk in KB
Return: CF clear if successful
	CF set on error
	    BX = maximum possible size in KB
Desc:	resize and erase the internal RAMdisk, then reboot the system
SeeAlso: AH=00h"Portfolio",AH=07h"Portfolio",AH=08h"Portfolio"
SeeAlso: AH=0Bh"Portfolio"