In a huge lot of TI99 computers, peripherals, and games I just bought was something called a Texas Instruments Expansion System. It is a huge, very heavy box about 17" long by about a foot deep. Looks like it has 10 bays, two of which are taken up by floppy drives. My questions is what is this item for? Is there any way for me to test it without hooking it up to the TI computer. Thanks in advance for any help. Mark