[gallier2]

In the list of applications of the 6502 architecture there is one big missing entry. Good old phone line modems using Rockwell chipsets (Hayes modem) that went up to 56Kbit/s. The central controller of the Rockwell chipset was an embedded MPU based on 65C02 kernel that were clocked to up to 75MHz (that's the fasted I had seen). The fact is relatively unknown as NDA with Rockwell were extremely tight.

[vidarh]

Less impressive, but something which was still fun to me when I had an Amiga: At least some Amiga keyboards used a SOC with a 6502 core.

One of my Amiga's had 4 CPU families: A 6502 core on the keyboard, a Z80 on the SCSI controller, an x86 on a bridge board (the Amiga 2000 had ISA slots, and one of them was in-line with a Zorro slot so you could get a board that let you run x86 software using a window on the Amiga desktop as the output; I don't remember if the bridge board itself was an 8088 or 8086, but I upgraded it with a 286 accelerator card) and of course the 68000 (+ a 68020 expansion)....

Looks like it's this one I remember:

https://www.amiga-stuff.com/hardware/6500_1.html

[actionfromafar]

The ABC computers used a Z80 in the keyboard and a Z80 as main CPU. Weird times. :)

[rbanffy]

Now I got curious: I have the impression the 2000 wouldn't be able to see the ISA bus unless a bridgeboard with an x86 was there. Is that so or could the 2000 see the ISA boards regardless of the bridge board?

[spicyjpeg]

There is an even bigger missing entry: toys. The Chinese company Sunplus/GeneralPlus has had a near monopoly on toy microcontrollers for over two decades at this point and the vast majority of their lower-end offerings are based on trimmed down 6502 derivatives, usually expanded with dedicated hardware for tasks like audio playback. Notably, the original Furby [1] and many Tamagotchi models [2] use such chips.

[1] https://archive.org/details/furby-source

[2] https://spritesmods.com/?art=tamasingularity&page=2