1/2-slot addressing:
• one half of an I/O module slot = 1 group
• each physical slot in the chassis corresponds to two words (32 bits) in the input image table and two words (32 bits) in the output image table
1-slot addressing:
• one I/O module slot = 1 group
• each physical slot in the chassis corresponds to one word (16 bits) in the input image table and one word (16 bits) in the output image table
2-slot addressing:
• two I/O module slots = 1 group
• each physical 2-slot I/O group corresponds to one word (16 bits) in the input image table and one word (16 bits) in the output image table