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PLOTTER - display file utilityI've been disassembling Gyron and needed something to help with working out where things were being put on the screen, so I wrote this program. I was…
... c coordinates
P = point x,y coordinates
H = hexadecimal values ... extended to the
rightmost pixel of that byte.
[/ ...
As can be seen from the instructions, it addresses the ... />
It always draws from top left to bottom right ... -
z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... up our x/y coords.
ld hl,xcoord ; vertical position.
from ld x, (xcoord)?
... defb 0 - initial starting position. of x - if we have ... ycoord defb 15 - initial starting position of y
The ... -
Help With AY Music Program in BASICHi, last year I started writing a BASIC program for making and recording AY Music. I thought it would be easier than learning how to use Soundtracker…
... /> 172 READ y
174 POKE USR "p"+x,y: REM Play Symbol ... /> 182 READ y
184 POKE USR "q"+x,y: REM Pause Symbol ... /> 192 READ y
194 POKE USR "r"+x,y: REM Stop Symbol ... READ y
204 POKE USR "s"+x,y
206 NEXT x
A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... address and A holding the pixel position (the usual deal).
position (0-7) within cell ... ex af,af' ;restore pixel position (number of shifts) into ... B with sprite data from A
ex de ... sub 8 ;subtract 8 from it
ld h, ...A game from an other machine.if someone interesting, this is a game I created in 1989. this is the basic source, maybe somebody can convert to specy. An image: http://www.ep128.…
... LET X$(X,Y)=A$(Y)
660 IF X$(X,Y)=" " THEN 760
670 IF X$(X,Y ... X,Y:"š":LET X$(X,Y)=" ":LET A=X:LET S=Y:GOTO 760
680 IF X$(X,Y ... IF X$(X,
endi
June 2017
Sinclair Basic
Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... ),#((_propfont_data - 0x0100))
; Multiply input y by 8
ld a ... (ix),#0x08
; calculate destination offset (from lookup table)
ld ... width
fastwidthloop:
; Rotate pixel through carry to output byte ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... support: can be converted from file selector menu pressing space ... -snapshot: get a ZSF snapshot from ZRCP
-print-footer: ... less cpu
-added scroll x,y on ula layer
-added ... located at the most right position
-cpu transaction log: ...why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…
... /> dec (hl) ; subtract 1 from y coordinate.
ret
; ... /> dec (hl) ; subtract 1 from x coordinate.
ret
; ... the x and y coordinates for the player's gunbase position,
from location.
inc hl ; ...this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …
... /> dec (hl) ; subtract 1 from y coordinate.
ret
; ... /> dec (hl) ; subtract 1 from x coordinate.
ret
; ... the x and y coordinates for the player's gunbase position,
from location.
inc hl ; ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... br /> ;
; Draw a pixel line from (x0,y0) defined (H,L ... />
; ******************************************************************
; Plot pixel at (x,y) coordinate.
; The (0,0 ...Bloody Jet Set WillyThis game suffers from the same problem that many others from that time do: it's too damn hard? Anyone got any pokes that will make the game easier, …
The position of Willy is important because his x,y coordinates are carried ... jump to. If the x,y coordinates just happen to be ... from moving (he's surrounded by impassable objects). Conversely if the x,y ... limit! Willy can also fall from "thin-air" in one room ...Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
... your assembler where to calculate jumps and whatnot from. In other words ... routine rather than simply do X,Y,Z to get a tone ...AMX MouseDoes anybody knows how the AMX-mouse works? Is it like a mouse for the Atari ST/Amiga? And if so which IN-port uses the software Which programs can …
... /> IM2 vector when an X movement of one
... on another vector when a Y movement
is made. ... the
mouse's "position" from these deltas.
The ... You can see
more from the code above.
... the
absolute X and Y positions of the mouse ...Text compressionI'm sure I remember seeing a short machine code routine published in a (very random) multi-machine listings magazine way back in the mists of time, w…
... the actual character is (+ 1 pixel of space)
Could ... />
Then to render at pixel x,y you'd need to do ... on the lookup table and pixel position then OR it into the ...need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... bytes as follows: 3 x 16 x 2 x 8.
The sprite ... xcoord. AND 7 to find pixel position and multiply by 96. Then ... so you can draw it from left to right, then right ...Zecut0r and ZAFA while ago (about 2 yrs)i took VbSpec and tried to port it to Delphi 6. Althought it was pretty weak, it. Meanwhile DelphiSpec 0.1 appeared and i wa…
... paper
;"resets paper colour from var j"
?k ...
;"resets the ink colour from var k"
0 ... /> 6 add
;"find print position y"
dup
;"make ... /> ;"we now have an y and x print position on the stack"
Pixel LimitIF Y3<192 THEN : LET x2=INT (128+X*A*SIN A): LET y2=INT (Y3): DRAW INK
... have to be anchored to pixel 0,0? If not, how ... ?
DRAW will continue from the last PLOTted point, which ... no previous point. Adding PLOT x,y before each call will ensure ... the lines are drawn starting from point x,y.New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... and 0).
* LOADing from tape
-------------------
To ... to appear when loading blocks from tape (so they don't ... /> 20 PRINT AT Y,X;"*": LET OY=Y: LET OX=X
30 PAUSE ... a mode change made normally from the keyboard. So if you ...Trig questionI'm trying to write a function that describes a 2D circle in 3D space - that's not important, just a bit of background! I've almost done it, but the…
... to calculate the plane, where that plane intersects with the X/Y/ ... in each of the x/y/z axes the plane ... function for each of X,Y and Z coords that ... to calculate the starting angle that I can work from when ... three formulae are known, apart from A, so I'm ...Trig questionI'm trying to write a function that describes a 2D circle in 3D space - that's not important, just a bit of background! I've almost done it, but the…
... 2D circle around (0,0) ( x = RcosA, y = RsinA, z=0 ), then ... the X, Y and Z = 0 axes), then a final translation from (0 ... along X/Y/Z == 0 that the plane slopes in, I can calculate ...sprite making in +3 BASIC?Any sprite tutorial I come across is far too complicated! Can someone help me? For instance, how do you create a person-shaped animated sprite which …
... the 1x2 character sprite into position on the 2x2 character positions ... to walk across 8 pixels from 1 chr square into another ... positions and multiply x 8.
For the X position add 2 * ... frame num.
You now have the pixel position ...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 ... sp_CS and sp_SS structs contain position and rotation information that can ... tile sprites from off-screen and move it to the position of ...Code sheetsI sure most speccy owners spent an hour or so copying the code sheet to jet set willy at the back of the classroom, but did anyone ever copy the shee…
... selection to choose from (or use some algorythm to calculate what a ... code should be based on the x,y postion ...Code sheetsI sure most speccy owners spent an hour or so copying the code sheet to jet set willy at the back of the classroom, but did anyone ever copy the shee…
... selection to choose from (or use some algorythm to calculate what a ... code should be based on the x,y postion ... anyway) asks for a word from the novella, chances are it ...Timex 80 column display driverI subsequently wrote an 80 column font driver for 512x192 mode.
... display file address (corresponds to x,y below)
.nextstate ... /> ; now compute display file address from (xcoord, ycoord) vars
; ... okay
; went from odd -> even column so ... to update the row,col position AFTER the char is ...how to pass arguments from Basic to MC ?can someone explain me (or give some link) how to pass arguments from basic to machine code? i mean something like this: PRINT USR xxxxx, arg1, arg2:…
... to find the image address from a look up table...
Y POSITION
20 poke 30001, 20: REM X POSITION
30 ... code routine passing in the x,y position the size of the image ...Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... ) you find the lowest item from either list and draw and ... you HoH editor picture.
From what is available in KnightLore ... move, move in either the x/y plane at the same level ... be on a different grid position ie. 1 complete block height ...CLEAR does not RESTORE the DATA pointer??According to the Spectrum manual, one of the things that a CLEAR command does RESTORE the DATA pointer. Either it doesn't actually do this, or some…
... is loaded it runs itself from the beginning" - not accepted.
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…
... for x,y position
; Tell PASMO to run from 32768< ... ld d,h ; set hibyte from graphics
inc h ; ... for x,y position
; Tell PASMO to run from 32768< ...
