El Fri, 7 Jul 2006 11:26:23 -0400 "Timothy Miller" <[EMAIL PROTECTED]> escribio:
> On 7/7/06, Diego Sáenz <[EMAIL PROTECTED]> wrote: > > Request Feature Coments > > > > I think that pc relative call, jump and ret can be usefull so video > > controler mini-programs will be relocatable. > > Relocatable to where? There are only 512 words of program space. I > could imagine that if you were going to do a lot of weird stuff with > the display, where you didn't want to take the time to load a whole > new program for minor adjustments, that you might have lots of > alternative subroutines. Supporting DPVL might require this. But > even then, it's no big deal to make a handful of writes to adjust > pointers. > > Also, this is infeasible from a hardware standpoint, since this would > require inserting a 9-bit adder into what is already the longest > combinatorial path in the design. Ok, only a weird idea. > It's also probably infeasible to have more than one level of subroutine. I do not propose that Sorry by te mindstormig
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