itch.io

First, the simplest case: you have a single byte in memory and you want to load it into a register:

: data  0xAB
...
i := data     # set i to the base address
load v0       # load from i into v0

Slightly more complex: you have an array of up to 256 bytes, and you want to load one by index into a register:

: data  1 1 2 3 5 8 11
...
i := data    # set i to the base address
i += v1      # add an offset (in this case, the value in v1)
load v0      # load data[v1] into v0

Same as before, but now we want 2 bytes:

i := data    # set i to the base address
i += v1      # add an offset. items are two bytes wide...
i += v1      # (we alternatively could have pre-doubled v1.)
load v1      # v0=data[2*v1], v1=data[(2*v1)+1]

Are those cases clear?