The Amiga 600 was supposed to replace the Amiga 500. It did this by having no numeric keypad, no CPU expansion slot (thereby rendering most Amiga 500 expansions useless], no way to upgrade the majority of the components, CIA chips that could easily be blown and could no longer be replaced due to being surface mounted, looking generally cheaper and costing exactly the same amount. In essance, it was a supreme marketing blunder - the A600 was originally to be called tha A300 (and the motherboard was marked as such), and would have fitted into the product range below the A500 as the cheap games machine it was intended to be. The real A500 replacement was the Amiga 1200, released a year later. This was but one of the many stupid mistakes that Commodore made, and their chapter 11 filing in 1994 was richly deserved.