Ultimate Amiga
Network Boards => AMOS Language Discussion => AMOS Factory => AMOS The Creator Forum => Topic started by: BooBoo on January 03, 2009, 03:02:23 PM
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Hi id like to be able to read and write HEX
With thanks to HH heres what I have so far
A=0
Reserve As Work 2,2000
LOCATIONVARIABLE=Start(2)
Bload "Temp:Blank.DAT",2
OFFSET=$20
Input A
Poke LOCATIONVARIABLE+A+OFFSET,$23
Bsave "Temp:blank.dat",Start(2) To Start(2)+Length(2)
So this will write "23" to the location you enter
So id like to be able to read it back so if the first byte is "00" Print "A" and if its "23" Print "B"
Any help will be appreciated :)
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this would follow on, and allow you to read not only the next value, but as many consecutive bytes as you want to.
You just need to "PEEK" to get your value back, and do some testing with IF/ELSE/ENDIF statements.
FOR N=0 to $20 : REM -- for as many bytes as you want to read. (set N=0 to 0 if you just want the one byte, or remove the entire FOR/NEXT loop)
readingcode=PEEK (LOCATIONVARIABLE+A+OFFSET+N) : REM - include any offset you need.
IF readingcode=$00
PRINT "A"
ELSE IF readingcode=$23
PRINT "B"
ELSE
PRINT "something else"
ENDIF
NEXT N
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Thanks again HH yep thats done it I think thats enough for me to get started on a little project im sure ill get stuck again soon ;)
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Hi again - Im using the hex to read game Map data and display the tiles on screen
I hopeing to to display 64 16*16 tiles across but im max at about 57
Is there any way I can increase beyond screen width 1023?
Screen Open 0,1023,200,16,lowers
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unfortunately, no, 1024 pixels is the maximum.
http://amos.condor.serverpro3.com/AmosProManual/6/601.html
you need to create a screen a couple of blocks larger than the visable area, (probably, 320+32) and have it update the edges (invisible areas) as your display attempts to scroll into them... basically you "reveal" the edge area as you scroll, and as you move along 1 block, the progam updates the edge areas according to your (temporarily) stored map data.
Getting a nice routine going for this can be a tad tricky at first i must admit, although i know there's a good example of it on the "ultimate amos" examples disk, from chapter 5 - (continuous scrolling).
http://amos.condor.serverpro3.com/tp-downloads/UltimateAmos.adf
writing an example here is a bit more tricky as its not something i'm overly familiar with off-by-heart, and i tend to have to look it up myself!
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@booboo
Are you scrolling horizontally, vertically, or both?
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Hi HH yes I want to keep the code nice a simple so I guess ill just shrink the tiles.
Just so you know its Chaos Engine CD32 im trying to read file A1Chaos.Cas - it looks like theres now 3 level viewers over at Eab but im just doing this for a bit of fun I dont want to get to serious.
But its just dawned on me how map data could be used in creating games in Amos.
SamuraiCrow
A very basic script that scrolls horizontally but i planning both.
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@booboo
The trick to making a scrolling map with unlimited boundaries is as follows:
Make the screen buffer as big as twice the width of the visible area plus 3 tile widths. Make the height twice the size of the visible area plus 3 tile widths (unless you want to use a custom copper list instead).
The trick is to draw the additional tiles to the right of the screen when scrolling right but also to the left of the visible area. This way by the time you run out of the right side of the screen buffer you'll have an exact duplicate along the left edge of the buffer also. The same works for the vertical dimension.
I used the unlimited horizontal scrolling technique for the "Ribbons and Curls" text scroller but it was only one tile high. It could scroll really fast though.
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Thanks for the tips I will be back as this little project has given me some ideas for makeing a game.
Ok it not much and its not finnished but its been a bit of fun :)
http://eab.abime.net/album.php?albumid=92&pictureid=650