Re: A86: Re: TI's ROM Sux
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Re: A86: Re: TI's ROM Sux
I sometimes think I do. :) I can still find tons of nitpicky
things about the TI calculators though... why would they waste
around 50 bytes of ROM space just to use jp over jr? Its
no great secret the TI link protocol is one of the slowest
things around... surely a few CPU ticks aren't gonna make any
noticable difference. The link port is limited electrically
to a relatively low bitrate.
Bryan
Matt Johnson wrote:
>
> >> really? tell ti, they used add
> >
> >I really wonder about the quality of some of their ROM coders...
> >Half the people on the list could do a much better job. They use
> >jp in some of the link port code to move PC up/down less than
> >10 instructions!
> >
> >Was the 8X ROM written in C as well? I believe the 92 ROM was.
> >Then again, if they have a whole ROM chip to play with they
> >can waste as damn much as they want.
>
> JP is faster then JR when no conditions are involved.
>
> When conditions are involved, use JR when there is more of a chance
> that the code will "fall through", else use JP
>
> Trust me, I am sure TI has guys who can program better then us.
> I'm sure all of them have EE or Computer Science degrees. Do you?
>
> Later,
> Matt
--
Bryan Rittmeyer
mailto:bryanr@flash.net
http://www.bridges.edu/horizon/
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