Re: A86: Hello World!(help!)
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Re: A86: Hello World!(help!)
Your problem is most likely not the sprite drawing. It's probably because
you are not checking to see if the key is released before checking if it's
pressed again. You need to do something like this:
if (key_is_held == TRUE)
{
if (key_just_pressed == FALSE)
key_just_pressed = TRUE
change_tile_state()
}
else
key_just_pressed = FALSE
At 12:55 AM 7/8/98 PDT, you wrote:
>
>sendto: assembly-86@lists.ticalc.org
>
>Hello World!,
> I'm trying to learn more assembly than is required to do a
>"Hello World!" program. I am attempting to start by programming
>a simple Lights Out* game. However I have encountered a problem
>with the game and was wondering if you could help me. What would
>be the best way to turn off the 'lights'?
> I have had only two ideas. I could FindPixel for the tile
>and 'bit' hl and jr to select a sprite based on the result to
>PutSprite (I'm using the 16*x routine off the 86 central site
>if it matters). The second way is there is a way to NOT! a 16*11
>tile to the screen; but I do not understand how do do that (is
>there an easy way to do that with PutSprite?)
>Heres what I've gotten so far; using the first way:
>
>;usual code first
>;key read, using port 1...the key read will jump to jp to log
>;---------------------------------------------------------
>; FIRST COLUMN OF BUTTONS LOG LN X2 COMMA STO
>;---------------------------------------------------------
>log: ;this corresponds to the Log button
> ld b, 5 ;the x coord
> ld c, 2 ;the y coord
> call Detect
> ld c,2 ;Findpixel will change c (I did a ld
> ;again instead of push/pop)
> call PutSprite ;Put sprite stored in (HL) at B, C
> ld a,1 ;change the accumilator
> jp Loop ;the beginning of the port read
>
>snip...most of the same for the rest of the keys...
>
>;---------------------------------------------------------
>; BUTTON DETECTION: LOAD ON/OFF SPRITE
>;---------------------------------------------------------
>Detect:
> ld e,b ;copy the x to so FindPixel will work
> ld d,c ;copy the y to so FindPixel will work
> call FindPixel ;unaltered from 86 central
> bit 1,(hl) ;tests the the top left pixel of the box
> jr nz, nnn
> di ;Do i need to do this?
> call onsprite
> ei
> ret
>nnn:
> di
> call offsprite
> ei
> ret
>;---------------------------------------------------------
>; SPRITE READING
>;---------------------------------------------------------
>onsprite:
> ld hl, lon ;lon is the 16*11 sprite state:ON
> ret
>offsprite:
> ld hl, loff ;loff the corresponding state being:OFF
> ret
>;end program stuff
>
>(don't rip my head off...its only 53 lines of codes and comments
>43 shy of the 100 limit suggested; though rather lengthy)
> SHOULD this work? I think so...Does it work? not as
>intended... if you hold down the log button the tile flickers back
>and forth between lon and loff. Did I screw up? Is there something
>really obvious that I'm missing? How can I get this to work?
>
>*Theres a java version at my web page for those who do not know what
>Lights Out is, at http://www.geocities.com/TimesSquare/9753/lights.html
>
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
>
// David Phillips
// mailto:electrum@tfs.net
// ICQ: 13811951
// AIM: electrum32
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