Re: A86: TI-86 ASM Questions...
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Re: A86: TI-86 ASM Questions...
In a message dated 8/19/98 12:07:46 AM Eastern Daylight Time,
GrafixxHQ@aol.com writes:
> Sorry if any of these questions are kind of stupid, but I am just starting
to
> program in ASM for the TI-86. Well, here goes:
> 1. Do you guys know an easy way to fill a memory loaction with zero's? (
> Right
> now I have a big (1024 byte) splash type screen that is empty and I use "
> ldir"
> to move it into the location)
> 2. Is there a web site or anything where I can find out how to check the
> keyboard ports instead of using "call GET_KEY", because it pauses a bit
when
> you switch from pushinng one button to pushing another?
> 3. How can you use trig tables to do multiples of sin and cos (rounded to
> nearest integer)? (like 5cos x or something) (anyone have a routine?)
> 4. I think someone asked this already, but I probably deleted the answers.
> How can you compress an image, such as a title screen pic, so it doesn't
> take
> up 1024 bytes?
>
1.there's a call defined in Assembly Studio 86:
_ldhlz .EQU 437Bh
hl points to data to be overwritten with 0's
b is # of 0's to write
2.again, look in Assembly Studio 86. (hint: look up "ports" in the help menu)