GBA crt0.s breaks compatibility with SuperCard SD

[GValiente]

Default cart speed isn't supported by slow flashcarts like the SuperCard SD:

calico/source/gba/crt0.s

Line 69 in 88d0fc6

ldr r12, =0x4317

AFAIK current crt0.s doesn't change the cart speed: https://github.com/devkitPro/devkitarm-crtls/blob/master/gba_crt0.s

If that cart speed is setup in the crt0.s, the user can't change it afterwards, so nothing can be done to make SuperCard SD compatible ROMs.

[Lorenzooone]

I second this request.
It would break support for lower end reflashable carts. I usually have checks in place to handle that iteratively in a proper manner.