Might this 7800 have an expansion port?

[ApolloBoy]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...6&category=3537

 

I've never seen a 7800 with a rainbow like that! Usually the rainbow starts with yellow and ends at green, but this one starts with red and ends with purple.

[SpendTooMuchOnAtari]

My 7800 has an Expansion Interface on the side of it but the rainbow is from yellow to green like you said.

[Smada Bez]

I just checked my two 7800s and the one without the expansion port was yellow to green. But the one with the port is red to purple.

[SpendTooMuchOnAtari]

I just checked my two 7800s and the one without the expansion port was yellow to green.  But the one with the port is red to purple.

 

My Serial number is: AT 8430091 and has the interface, I believe I had it playing Robot Tank also with no problem. Although some of the Konami games are difficult to fit in this machine.

[CPUWIZ]

I would just like to remind you guys that the tops are interchangeable (is that a word?).