Update Mega-Chip Documentation

chip-8 / extensions

CHIP-8 Extensions Reference

https://chip-8.github.io/extensions/

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Closed NinjaWeedle closed 2 years ago

NinjaWeedle commented 2 years ago

Add missing opcode and compatibility information on the Mega-Chip8 extension.

An important yet undocumented opcode, 09NN, is currently missing from the docs.

This opcode is necessary for MegaChip's collisions since it doesn't XOR in MegaChip mode, and is used by Mega Minimal and Mega Twister Demo.

This PR adds that op and updates some other info on MegaChip's quirks.

tobiasvl commented 2 years ago

Thank you!