[Coco] {coco} wordpak RS info needed

[RJRTTY at aol.com]

      Does anybody know where  the data latch is in the Wordpak RS 80
col. card.  I know that the configuration
registers are at FF78 and FF79  but I dont know the data
latch address.   Also what procedure is used to enable the latch.

Also would anybody happen to have any software drivers for it?  Both
RSDOS and OS9.

TIA
Roy