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kbeckmann / PicoCart64

N64 development cart using a Raspberry Pi RP2040
BSD 2-Clause "Simplified" License
759 stars 42 forks source link

Stackypi support #55

Closed Tom-Neverwinter closed 2 months ago

Tom-Neverwinter commented 2 months ago

I was randomly looking at rpi2040 boards and noticed this newish one

64MB vs the 16MB

I'm assuming if the pinout is the same it could be flashed with a larger u2f file and work the same?

https://www.kickstarter.com/projects/ash-kumar/pico-zero-rp2040-pico-based-board-on-pi-zero-form-factor

kbeckmann commented 2 months ago

The root issue is access time to read from the flash, it has to be very fast. The flash controller in the rp2040 has a limit on 16MB. Not sure how this Kickstarter project is doing to solve the issue.

This fork explores a way around this limitation https://github.com/pdaxrom/N64cart

jshield commented 2 months ago

@Tom-Neverwinter it is not meant to be brother, despite what it says. the Stacky Pi ships with 64Mbit of memory which is 8MiB

kbeckmann commented 2 months ago

Ah yeah it’s unfortunate that this mistake happens over and over again, bit vs byte. Let’s hope that the next RP chip solves this issue.

To clarify; I’m referring to the 16 MByte limit.

Tom-Neverwinter commented 2 months ago

the naming convention used by the pico is annoying and confusing. we stopped using bites over a decade ago

kbeckmann commented 2 months ago

The flash chip vendors usually use bits in their product descriptions and model names like this one https://www.winbond.com/hq/product/code-storage-flash-memory/serial-nor-flash/?__locale=en&partNo=W25Q128JV