This is a CASTLE CARE-TECH msx expansion card, also known as an MSX G3 PLUS 74 card. It expands a CASTLE G3 plus board to 74 zones. Includes an extra nvm chip required when fitting an msx card to this panel. Grade 3 software version v5.07. New, unused and tested stock.
CASTLE CARE-TECH MSX 74+ v5.07 EXPANSION BOARD
