Re: A86: Re: TI's ROM Sux

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: TI's ROM Sux
From: Dux Gregis <assets@eden.rutgers.edu>
Date: Sat, 27 Jun 1998 11:11:10 -0600
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <002b01bda1e5$9585d280$07b456cf@rebecca.dogtech.com>
Reply-To: assembly-86@lists.ticalc.org




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

 I don't know ... _exec_pg3 does all kinds of crazy stuff with the
stack; it would have been a lot prettier if they just used jp (hl).

References:

A86: Re: TI's ROM Sux

From: "Matt Johnson" <matt2000@gte.net>