machine.mem32[] returns signed 32bit integers

[oddstr13]

I would expect unsigned integers here.

[dpgeorge]

Yes, it's possible that unsigned integers would be the more common use. But it's easy to get around the current behaviour: just do mem32[addr] & 0xffffffff.

It could be argued that there should be signed and unsigned accessors, like mem32 for signed and umem32 for unsigned.

[nickzoic]

(yeah, I think we should fix that ... but that'd be all the ports, right?