NHD-0420DZW user-defined characters

[BobG]

Although the Newhaven manual for this family of displays describes the definition of up to 8 user-defined characters in GCRAM (page 19), the preceeding font tables show 16 addresses in CGRAM.  Could there possibly be space for 16 different characters, or does the proprietary controller operate like the ST7066U and essentially ignore bit 3 when accessing GCRAM?  The ST7066U manual shows this by repeating the addresses 0- 7 in the font tables.  (Sure would be nice to have 16 CGRAM characters.)