Well, there was the Commodore SX 64. Not exactly lap sized but portable for sure.

https://de.wikipedia.org/wiki/Commodore_SX-64

Cockbrand 36 minutes ago | parent | next [-]

Of course, is's great for executive poolside work, see also https://sm.pcmag.com/t/pcmag_uk/photo/c/commodore-/commodore...

	▲	bartvk 4 minutes ago \| parent [-]
		Great find, it looks kinda silly now. But back then, they must've sold more than one.

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WillAdams 3 hours ago | parent | prev | next [-]

Not much later there was the Radio Shack Model 100, and a bit after that the Gateway portables, and of course, eventually the NEC Ultralite and eventually the Sharp PC-6220 (which was available under two other brands as well).

Also, for those with deep pockets there were the GRiD laptops....

	▲	classichasclass 3 hours ago \| parent [-]
		None of those are 6502-based, though. I think that's why OP referenced the SX-64.

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kstrauser 5 hours ago | parent | prev [-]

It weighed 23 pounds. It was approximately as portable as a tower PC. You could schlep one around, but it'd get heavy after a while.

	▲	classichasclass 3 hours ago \| parent [-]
		Beat the heck out of dragging a 1702, a 1541 and a C64 around, though. I have three and they made regular trips to vintage fests because they were easy to set up. They can easily be connected to more drives or a bigger screen. Their only major drawback, and this is a big one, is that you can fry the SID if you plug in the external monitor with the power on. I did that once to my horror, and so have others.