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Looking at the chips installed in an Apple II Plus motherboard, is there a way to tell which chips are 4K RAM chips and which are 16K?

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By the numbers printed on them? – Majenko Nov 7 '11 at 18:59
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IIRC the 2116 was a standard for 16k, don't recall the prefix though. – stevenvh Nov 7 '11 at 19:03
fact check: the 2116 chip was a 1K x 4 bit static ram; there appears to also have been a 16K x 8 RAM board employing 32 of the buggers, bearing the designation CCS 2116. At the time, static ram was considered expensive, and I believe the Apple used dynamic ram, like some contemporary machines. The 4K dynamic chips needed three supply voltages. – JustJeff Nov 8 '11 at 3:11
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According to this site the Apple II used TMS4116-20 DRAMs for the 16k chips, although I cannot find any references I'd assume the TMS4104 was used for 4k versions.

The full schematics for are available in the Apple II Reference Manual.

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the 2+ I used to have had 4116 chips in it – JustJeff Nov 8 '11 at 3:13
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