Re: [9front] proposal: move common code from md, nes, snes, gb, gba, c64 to a libemu

[Julius Schmidt <aiju@phicode.de>]

it's basically sound.

some thoughts:

> - (?) added toggling fullspeed emulation when audio is enabled
by dropping samples?

i don't like that this is enabled with space.
i would prefer some more remote key, like `.

personally i think this is a misfeature. in other emulators i always find 
myself using it too much.

> - (?) dynamic rescaling from x1 to x16 for larger screens;
>  removed -2, -3
i think i've stated before i don't like this very much.
but i'll accept it begrudgingly, i think :).

> - profiling: now toggled at runtime, removed -T
good

> - fix for speed up after pausing emulation with audio turned off
reliable control of emulator speed might need control theory...

> - emalloc, as often reproduced in the emulators;
>  might be better off in libc or nowhere
moving emalloc to libc has been discussed many times and vetoed every
time.
not sure what you mean by 'nowhere'.

> - the signed typedefs might be better placed in /$objtype/include/u.h
yes i would like that.
we've postponed doing this too many times already.

> - another hacky library
who cares.

> - clumsy; input bit vectors are semi-arbitrary and adaptation in some
>  emulators is fairly bad; worse examples: snes and md
> - regkeyfn is not very useful as is
i would like this to be fixed.
why not just register all keys?
something like
 	regkey("left", Kleft, 1);
to register it as bit 1 in the input bitvector.

> - snes hires and md intla are ignored when scaling
that seems like it might be too confusing with automatic scaling.

> - maybe user programs should never care about scaling, and the library
>  should instead do some turbooptimized duff's device on screen flush
not sure.

> - can we merge 2600 even if it's buggy?
yes.