Bally Astrocade... Also had a 2600.
Apparently the Astrocade came out in 77... though mine says it came out in 75....
which is weird... since it wasn't called the astrocade till the 80s.
I was playin that thing before i even had memories... literally. Like... my 2nd and 3rd earliest memories involve that system... apparently after i had played it for a while.