re: re: Re: A89: the a68k assembler and how it makes machine code
[Prev][Next][Index][Thread]
re: re: Re: A89: the a68k assembler and how it makes machine code
What I want to know is how the assembler gets the hex code for instructions that you write
down. Like how does "4e444e750000" stand for "Trap #4" and then "rts"?
Bryan
> ** Original Subject: re: Re: A89: the a68k assembler and how it makes machine code
> ** Original Sender: Zoltan Kocsi <zoltan@bendor.com.au>
> ** Original Date: Tue, 9 Nov 1999 18:20:52 +1100 (EST)
> ** Original Message follows...
>
> > ok, I ordered the documentation. hopefully, it will clear up any problems I have. Oh
yeah,
> > this is probably in the docs, but I can't wait to find out: how do ram calls work? and
why
> > can't as92 do them yet? j/w. Thanks
>
> I am not sure that I understand your problem. The way an assembler
> works is fairly simple. The documentation you ordered, however, will
> not explain that. Instead, it will have detailed explanations on the
> various m68k instructions, their bit-patterns (for not too many
> instruction has a fixed hex code) and other aspects of the 68000 CPU,
> such as bus timing, electrical characteristics, instruction execution
> times etc.
>
> They will *not* explain anything that is TI89 or TI92 specific or
> specific to your assembler. They will *not* explain assembler
> directives, nor library handling. You won't get any info on label
> calculations, relocation techniques and alike.
> In fact, Motorola tells you what the chip does when it reads certain
> bit patterns from its memory. It will give you absolutely no help with
> regards to generating those bit patterns from an assembly source.
> The documentation that comes with your assembler is supposed to cover
> that area.
>
> It might be wiser if you tried to explain what you actually want
> to know or what your actual problem is.
>
> Regards,
>
> Zoltan
>** --------- End Original Message ----------- **
>
Download NeoPlanet at http://www.neoplanet.com
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
Follow-Ups: