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Comment by Retr0id | Hacker News Reader

> Neo6502 [...] consist of real W65C02S processor and RP2040 which emulates RAM memory, video, keyboard, SPI, I2C, UART, GPIOs, Sound

(via https://github.com/OLIMEX/Neo6502)

6502 is fun but coupling it to a RP2040 takes most of that fun away again, imho. Why not have the RP2040 emulate the 6502 too?

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We Oric-1/Atmos users have been enjoying the heck out of wiring up an RP2040 to our systems .. it makes an excellent peripheral controller .. adds USB mice, keyboard, mice, etc. to 40 year old systems.

Just wanna say, adding the RP2040 to 8-bit systems increases the fun, yo ..

I'm pretty sure Neo6502 is going to get LOCI emulation mode for booting with the Oric Atmos ROM sooner or later .. that is going to be very interesting, from the perspective of next-generation Oric development ..

I can see it being fun if it's truly a peripheral to an otherwise fully-functional system

Indeed, that is exactly what it has become for the Oric-1/Atmos, in the LOCI project .. which gives the Oric access to USB peripherals, including storage, and getting such things under control are the first step in making retro- computers useful again ..

> 6502 is fun but coupling it to a RP2040 takes most of that fun away again, imho. Why not have the RP2040 emulate the 6502 too?

There's a spectrum of fidelity/purity in all retro computing.

This sits a bit purer than "emulate it all on RP2040", far from "physically the same chips", but practically cheap enough for many.

I think it works if you treat it as a black box - the RP2040 and 2350 are synchronous and can basically play the role of an FPGA here.

Although I could see a version of this with two RP2350's.

Do you use memory to emulate memory

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