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Slot 2 was never used in laptops.
Nor was slot 1 or slot A.
370 was intended to be a slot replacement but was … that’s a whole other story. And to be honest, you can probably find a slot socket in a laptop somewhere. Stupid idea. I’ll come back to that though.
The Mac-style cpu cards come in some-40 different configurations. They are reduced-surface, underpowered versions of the slot CPUs. But that’s an understatement to a degree.
Oh, and the Motorola based design actually has a name; processor direct slot. So, nobody give anyone trouble over calling a pga a slot here. Just saying.
Actually the design dates back to the late 70s. Motorola was trying to create a dual IS cpu that occupied a single board with 2 relational CPUs and co-processors. All on a high-bandwidth, low-power platform. Originally these were in house chips that carried a mos-compliant cpu and a Zilog 80k compatible.
With the aim alliance Intel began playing with a scaled down pentium as well as power processors for the design; allowing the full slot style platform on a socketed interface.
This led to both power and Intel Macs with this design. As well as laptops on the x86 is.
Back to the beginning though. Has anyone actually put a real slot processor in a laptop? Probably. I’ve seen a 409 and a 454 strapped to a go cart sled. So I’m sure someone somewhere tried the equivalent with a cpu.
But a better analogy would be building a cabin on top of a jet engine with no ventilation. They run very hot. That’s why even the upper end of entry level processors had big heatsinks stock. Any laptop that did anything would burn out very fast!
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