-
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... pressed
; #FE - SHIFT, Z, X, C, & V
; ... bit 0, a
ret z
; are we pressing ... br /> ret
; draw column aligned sprite, arbitrary row ... ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... pressed
; #FE - SHIFT, Z, X, C, & V
; ... bit 0, a
ret z
; are we pressing ... br /> ret
; draw column aligned sprite, arbitrary row ... ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; b = pixel y-coord
; c = pixel x-coord/8
; b = pixel y-coord
; c = pixel x-coord/8
ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... br /> ; b = pixel y-coord
; c = pixel x-coord/8
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; b = pixel y-coord
; c = pixel x-coord/8
; b = pixel y-coord
; c = pixel x-coord/8
ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... br /> ; b = pixel y-coord
; c = pixel x-coord/8
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; b = pixel y-coord
; c = pixel x-coord/8
; b = pixel y-coord
; c = pixel x-coord/8
ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... range 0-23 for both x and y)
[/code]
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
...
; b = pixel y-coord
; c = pixel x-coord/8
; b = pixel y-coord
; c = pixel x-coord/8
ret
; draw an 8x8 sprite arbitrary x, y position
; hl ... range 0-23 for both x and y)
[/code]
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…
... a lot of PLOT and DRAW statements. Not being an expert ... on PLOT and DRAW in those days, and even ... slightly hard to use Super Draw program from Sinclair Programs all ... />
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…
... 0
RET Z ; Leave right/left ... CP 0
JR Z,ps1
RRA ; ... CP 0
RET Z
; ... bs1:
; Get x,y
LD A,(IX+1 ...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] ; ***********…
... 0
RET Z ; Leave right/left ... CP 0
JR Z,ps1
RRA ; ... CP 0
RET Z
; ... bs1:
; Get x,y
LD A,(IX+1 ...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…
... BASIC; 26 numeric functions (A-Z) and 26 string functions ( ... A$-Z$). Owing to the internal ... FN A(x,y)=(128 AND INT (x/128)+INT (y/128)=2 ... 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)+ ...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…
I need to draw a small sprite (16 bytes) ... on the sprite x,y). I would then draw the sprite to the ... sprites x,y had moved to a different screen address then draw the ...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 …
... create 6 different tiles and draw the whole screen with them ... sprite 1 drawn at coordinate (X,Y), and also at (X2,Y2 ...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…
... : CLS
40 LET x=10: LET y=19: LET a$=""
70 LET z$=INKEY$: IF z$>"4" AND ...Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…
... /> x' = x * cos (z) - y * sin (z)
y' = x * sin (z) + y * cos (z)
x*cos(z)-y*sin(z)
;----------------------------------------------------------------------------< ... de ;yr=y*sin(z)+y*cos(z)
...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 ...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 in these ... how to extract just the Y-rotation angle out of that ...Manic miner remake....Hi all. I just started a Manic Miner remake using Python + Pygame. The aim is to be as pixel perfect as possible (except perhaps I won't have colour…
... who would be willing to draw a new set of tiles ... know the full list of x/y offsets for Miner Willy's ...Bresenhams circle algorithmI post here my final circle code to replace, if you want, the one in the ROM. It only uses integer math and runs very fast and is very compact. It is…
... every pixel (x,y) it calculates
;we draw a pixel in ... />
;Assume x^2+y^2=r^2 represents the ... /> ld l,b ;L is y
Loop: < ...
inc h ;H é x
...reading Hex[code]1 DIM a$(20,20) 2 DIM g$(16) 3 LET g$="\::\ \' \ '\ .\. \.:\:.\:'\':\''\..\: \ :\'.\.'" 4 BORDER 4 20 LET a$(1)="00000000000000000000" 21 LET …
... (test only)
101 FOR x=1 TO 2
102 ... x,y;g$(VAL (a$(x,y)+1))
104 NEXT y
105 NEXT x ... prog I'm trying to draw a game map using the ...Best way to store vector images in Sinclair BASIC?Let's forget for a moment that Sinclair BASIC is slow. If I have a picture made entirely of vector images, what would be the best way to store that d…
... matrix of A (x,y,a,b), where [I]x[/I] and [I ... ]y[/I] would be the ... ] would be the parameters for DRAW. Since PLOT is only necessary ... ]x[/I] was, for example, 256, the routine would skip PLOT, DRAW ...Rom Routines list ?Exist some document that show detailled the routines on the spectrum ROM ? Ad for the Spectrum +3 ? are they the same or exist more ? Example i was …
... ]plot x,y[/B]. But what is the routine to handle a DRAW ...WTF stupid machine10 LET X = 28672 or 61440 depending on how much memory you have 20 LET A$ = ?? 30 IF A$ = ?? THEN INPUT A$ 40 LET Y = CODE A$ ? 48:IF Y>9 THEN LET Y …
10 LET X = 28672 or 61440 depending on ... ;9 THEN LET Y = Y ? 7
50 LET Z = CODE A$(2 ... LET Z = Z ? 7
60 POKE X,16*Y + Z
70 LET X = X + 1 ... GO TO 30
x is out of range
X is out of range my ...Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... ), cp 1, jp z,printscr1,cp 2, jp z....and so on ... an ix lookup table with x,y coords for each whole screen ...Some issues with my UDG programFor the sake of remembering how to do some things in Basic, I started coding a small program that could be used to create UDGs: [url]http://db.tt/tt…
... was:
-When x and y are initially set, x1 is ... equal to x and y1 to y ...
-If x or y change [I ... what was expected (set c(x,y) to 1 if 0 and ... routine would sometimes fail to draw a pixel in the big ...New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
... reset.
Fixed bug in DRAW with only one distance parameter ... /> Added WINDOW PUT GRAPHIC ,winid,x,y support
Added GRAPHIC SCROLL ...Problem with a small basic routineDear all; I have been messing about with a routine (originally published in Your Computer 1982, by Tim Langdell). The idea of the program is to simul…
... BORDER 1
20 FOR X=-100 TO 100
30 ... (SQR((10*4) ? X*X)/R)
50 FOR Y=V TO ?V ... STEP ?R
60 LET Z=INT ... (80+30*SIN((SQR(X*X+Y*Y))/12)-7*Y)
70 IF Zyeah 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 ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... cp 22
jr z,foundat ; recognises some control ... at, (followed by x,y coords as next two ... cp 13
jr z,foundcr ; recognises some control ... or a
ret z
ld b,a ...BIFROST* Advanced Programming - part 6The purpose of this demo is somewhat different from previous ones. Instead of teaching a new technique, the main goal here is to demonstrate how much…
... #define MIN(x, y) ((x) < (y) ? (x) : (y))
#define MAX(x, y) ((x) > (y) ? (x) : (y))
... }
} else {
// draw player facing to the left ... /> }
// draw enemy at new position
