-
Convert x,y to Attribute Address in AssemblyWhat is the fastest way, given x,y (in hl) to return the attribute address?
What is the fastest way, given x,y (in hl) to return the attribute address? -
Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …
... out how to convert an x,y coordinate pair (pointing to a ... -
DRAW x,y,a Algorithm - how does the ROM do it?Hi all, Getting on with SpecOS, and one of the things I would love to do is to preserve the original ROM's behaviour when drawing Arcs. This is don…
... is done by using DRAW x,y,a where the alogorithm starts ... , finally ending up at point x,y.
I've been ... -
X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
First public outing of X=Y=Z for the 48K Spectrum, ... -
New Game : X=Y=ZFull version of X=Y=Z is now available from my site at: [URL="http://www.bobs-stuff.co.uk/extras/x=y=z.zip"]http://http://www.bobs-stuff.co.uk/extra…
Full version of X=Y=Z is now available from ... .bobs-stuff.co.uk/extras/x=y=z.zip"]http://http://www ... .bobs-stuff.co.uk/extras/x=y=z.zip[/URL]
Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…
... byte words x, y and then sort them on y (ignoring x), I'm ... x-coord, y-coord. It sorts on y-coord only and ignores the x ... a, (hl) ; A = data[left].y
or a ; CCF
y
or a ; CCF
Y if I find a movable ...Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... 2 ways of calculating the y-cord of a pixel row ... of shifting and masking the X & Y co-ords into the ... I suppose that holds the Y address of each pixel row ... other ways of determining the y co-ord of a pixel ...yeah x 0.0.2first: [URL="http://www.yeah-unix.org/downloads/yeah_0.0.2.tar.gz"]the goods are at - http://www.yeah-unix.org/downloads/yeah_0.0.2.tar.gz[/URL] aft…
... with sdcc.
yeah x 0.0.2 tue may ... /> - mouse device driver (just provide x,y and mouse buttons on read ...AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
... control - increase tone every x frames by y depth
6 ... control - decrease tone every x frames by y depth
7 ... Arpeggio - 4bit rate 4bit x tones 4bit y tones - alternate between ... - depth
Arpeggio 1byte - x+y semitones
Vibrato and Arpeggio ...ArtistryIn my younger days (and to a certain extent, now) I was always intrigued about how the loading screens were constructed. Back then I'd assumed it was…
... />
PAINT x,y,c1,c2
...where x and y are coordinates ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
...
; A=Y Offset
PrintSprite:
; Get x,y
LD A,(IX+1 ... C Contains X (0-31)
; B Contains Y (0- ...
; Example X=20,Y=10 (This address would ...IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... />
bs1:
; Get x,y
LD A,(IX+1 ... /> ; C Contains X (0-31)
; B Contains Y (0-23)
; Example X=20,Y=10 (This address would be ...Zaf-forth to Z80 compiler Build 5This forth like complier is changing almost every day with new items been added. Here is a new Zaf-forth word add it the sptword.fth file - which is…
...
procedure zxcircle ;"x y r zxcircle to screen"
;"random sizes abd random x and y"
;"07-October-2004 ... add =xrandom
;"calc x position that will not give ... yrandom ?rrandom zxcircle
;"put x, y, and r on stack call ...New Functions for Sinclair BasicA total of 52 new functions can be added to Sinclair BASIC; 26 numeric functions (A-Z) and 26 string functions (A$-Z$). Owing to the internal structu…
... FN A(x,y)=(128 AND INT (x/128)+INT (y/128)=2)+( ... 64 AND INT (FN V(x,128 ... INT (FN V(FN V(x,128),64)/32)+INT ( ... FN V(FN V(y,128),64)/32)=2)+(16 ... V(FN V(FN V(x,128),64),32)/16)+ ... V(FN V(FN V(y,128),64),32)/16)= ... V(FN V(FN V(x,128),64),32),16)/ ...Help needed with drawing masked spriteI need to draw a small sprite (16 bytes) on to the screen using a mask. Its the only sprite that will be used so speed isn't too important. I was goi…
... screen (based on the sprite x,y). I would then draw the ... the buffer if the sprites x,y had moved to a different ...After Christmas maps and utilities :)Call Me Psycho [url="http://zx-maps.wz.cz/map.php?id=CallMePsycho"]http://zx-maps.wz.cz/map.php?id=CallMePsycho[/url] Commando1 [url="http://zx-maps…
... ) you can set the offset X/Y - number of pixels, which are ...z88dk + splib2: another question (sprite instancing)I'm making some tests with z88dk+splib2, with the idea of creating a game sometime in the future, and I have come across a problem. Let's suppose I …
... sprite 1 drawn at coordinate (X,Y), and also at (X2,Y2 ...BASin release 12c available for downloadHi again, folks - I've had no more reports of further bugs in BASin, so I'm assuming that we've now got a stable editor. Release 12c is now availab…
... /> Fixed - The syntax helper displayed "X, Y" for the ATTR function, where ... it should have been "Y, X". (MetalBrain)
Fixed - Using the ...BASin release 12c available for downloadHi again, folks - I've had no more reports of further bugs in BASin, so I'm assuming that we've now got a stable editor. Release 12c is now availab…
... /> Fixed - The syntax helper displayed "X, Y" for the ATTR function, where ... it should have been "Y, X". (MetalBrain)
Fixed - Using the ...Amazing Short Type-InsHey all ! Been having some pretty stressfull days lately so I tought I would type in some games. There was a very nice type-in book here in Slovenia…
Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... on the screen based upon x,y pixel coordinates, which are altered ...How to create pretty screenshot maps[size=+1][b]A. What will I need?[/b][/size] 01. Your favorite [url=http://www.worldofspectrum.org/emulators.html]Speccy emulator[/url]. 02. An util…
... of a bitmap, use Offset X/Y (Ctrl+O).
06 ... of a bitmap is 9999 x 9999 pixels.
07 ... the map, color depth, step X/Y values, colors, etc. (look at ...A slightly silly question, or is it?Someone on another (PC) forum asked what specification of graphics card would match the human eye. Not the easiest question to answer, and of course …
... the right phrase, I mean X/Y ratio) does the human eye ...Pixel Explosion CodeJust a little snippet to cause explosive effects. It uses table lookups for the screen address, and can handle up to 32 pixel particles. A particle…
... now has proper address for x,y position
... ; 1 Y Position
; 2 X Direction
; 3 Y Direction
; 4 X Direction Pause ...Kempston mouse emulationOK, so I've read the FAQ and can understand how to "do" a mouse in an emulator. Just to be clear about it though, perhaps someone could be kind enoug…
... to confirm:
The x/y counters roll round in the ... movements, not just absolute screen x/y co-ords, right?
The Non Randomness of Sam BasicHows about this for weird. Hardly ever bothered with such simple stuff before but this is what I just did on the Sam ( as in a real one now I've got …
... /> 10 LET x=RND* 255
20 LET y=RND *171
50 PLOT x,y
60 GO TO 10 ...Blok*Load on Multiface 128Spinning this off into a new thread to avoid cluttering up the original: [url]http://www.worldofspectrum.org/forums/showthread.php?t=17999&page=7[/u…
4x4 matrix QI have a 4x4 matrix used for rotating a 3D object to rotate to face any point in one simple step, and looks something like: [code] a b c 0 e f g 0 h…
... ]
This rotates in X, Y and Z simultaneously (no translation ... how to extract just the Y-rotation angle out of that ...
