Add echo and expr + tweak parse

Zeal8bit / Zeal-8-bit-OS

An Operating System for Z80 computers, written in assembly

Apache License 2.0

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Closed sijnstra closed 10 months ago

sijnstra commented 10 months ago

Adds new trivial initial versions of expr and echo, and prepares parse + strutils to be able to do more.

sijnstra commented 10 months ago

Hopefully that's cleaner, faster and more useful. I've already re-written ls to use the new 32 bit decimal conversion for the next PR.