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BLOG- ZXSporgBasic RPG development thread- Inspired by the Spectrum 30 show, and after a six-month wait while I was busy playing loads of gigs, I have decided to do a spot of Spectrum coding…
First development in 8 months on this project - changed the mechanics of setting the colour of the walls in line 9720. Instead of one general ink 1 statement, it specifies the ink colour blue for each block printed. This is so I can print black (for a door ... -
BLOG- ZXSporgBasic RPG development thread- Inspired by the Spectrum 30 show, and after a six-month wait while I was busy playing loads of gigs, I have decided to do a spot of Spectrum coding…
Actually decided the doors need to be white as the that's the only colour the PC can walk over. Line 9720 is now a bit of a monster as the ink colour needs to be evaluated with [I]INK 1+6*(VAL t$(5)=1)*((j=7)+(j=8))[/I] or similar before each square of ... -
Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... -d -ns -nm -Mo -DFORzx -x./zx_clib @./zx.lst
Error ...
1 errors occurred during assembly
make: *** [zx_clib.lib] Error ...
1 errors occurred during assembly
Key to filenames:
Self modifying code ??I made a game in C that was mostly accessing arrays and using FOR NEXT loops, I ran out of memory, so I was thinking would it be possible to use sel…
... else fails.
X) Or you could ask people ... like all those optimise my assembly threads, but in C.)A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
...
6 errors occurred during assembly
[/CODE]
... /> z80asm -d -ns -nm -Mo -x../.././x11 @x11.lst
make ... -d -ns -nm -Mo -DFORz88 -x./z88_clib @./z88.lst
Error ...
1 errors occurred during assembly
make: *** [z88_clib.lib] ...Code to test if a rectangle is in a rectangle[SIZE=3][FONT=Calibri]I am looking to write some code that will check if a rectangular shape is outside or overlapping a second rectangle. If the sma…
... 10 CLEAR 39999:
PLOT 64,44: DRAW 128,0 ... 170 STEP 6:
PLOT x,y: DRAW 5,0: ... br /> RANDOMIZE y*256+x: POKE 40000,PEEK 23670: ... 22 OVER 1:
PLOT x,y: DRAW 5,0: DRAW ... ,0: DRAW 0,-5: PLOT x,y:
OVER 0:< ...A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... one byte is AND binary mask, one byte is OR data ... list of data pointers and X/Y character co-ordinates.
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... one byte is AND binary mask, one byte is OR data ... list of data pointers and X/Y character co-ordinates.[/QUOTE ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... /> 3 DEF FN x(x,y,d)=FN a(x,y,FN r ... )):
DEF FN a(x,y,r)=x*COS r-y*SIN ... DEF FN y(x,y,d)=FN b(x,y,FN r ... )):
DEF FN b(x,y,r)=x*SIN r+y*COS ... +1 OR a=3:
PLOT a(p1,1),a(p1 ... 3:
LET a1=FN x(a(a,1),a(a ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... /> 3 DEF FN x(x,y,d)=FN a(x,y,FN r ... )):
DEF FN a(x,y,r)=(x-x0)*COS r-(y ... DEF FN y(x,y,d)=FN b(x,y,FN r ... )):
DEF FN b(x,y,r)=(x-x0)*SIN r+(y ... b=1 TO 4:
PLOT p(a,b,1),p ... 4:
LET a1=FN x(p(a,b,1),p ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... would take 12.5kb if x,y were merged into one ... calculate the addresses from the plot coordinates - but then I realised ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... regard to 256 and the x coordinate.
There's ... after every step. Save the plot addresses and bit positions and ...+3 Disk drive motorHi, I'm creating a disk file menu selector. I was wondering how to turn off the +3 drive motor and the motor timeout check from Basic (poking the co…
... 4 etc. Ideally you should mask the bit off and then ... .
Here is the assembly code to do it safely ...Convert AT co-ordinates to PLOT co-ordinatesHow do you convert the 2 from MC? I don't know how to convert the vertical value as they're differently ordered... Heres what I have so far: [CODE]…
PLOT is from the bottom of ... 175-Y to get the plot position down the screen (from ... that will give you the plot position of the top of ... -Y instead). e.g. 21 x 8 = 168 then 175-168 ...Which Windows Emulator will support SPECTRA?I want to start crossdeveloping games for SPECTRA, but it is a pain in the ass to save the TAP on USB Stick or SD Card and test them on my eMac SP Em…
... calculate attribute address from its X and Y coordinates, like:
[CODE]function CalcAdrQuadOffset(x as ubyte,y as ubyte ...Un-PLOTting in the #0 areaHow do I go about un-PLOTting in the bottom 2 lines. I am aware the ROM PLOT routine only works in the top 22 rows, so how would I go about depletin…
... a ;B =y; C = x
ld a,191 ; ... $22b0 ;PIXEL_ADD+6 - C (x coord) is preserved
neg ... ret nc ;don't plot if address too high
PLOT, which checks the vertical ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... LET p=POINT (x,y): LET c$(x+1)=CHR$ 143 ... y,x+1) THEN PLOT x,y: PRINT x;",";y;" ";
80 NEXT x: ... />
Which calculates the PLOT coordinates for all of the ... bit to the routine to PLOT an enlarging character across ... 1 TO y1+s-1: PLOT p,q: NEXT q: ...Morcar's Selling or trading threadThinning out my collection so i can get more of what i want. If you want anything on here let me know and we can work out something. I am also up f…
... Capes Strongman
Ghostbusters 2 (x 2)
Glider Rider
Gunship
I Of The Mask
International Rugby Simulator
Survival (X 2)
The Games: Winter ... : Survivor, Pac-Land (demo) (X 2)
Your Sinclair Smash ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... max_iteration = 1000
while ( x*x + y*y < 2*2 ... max_iteration )
{
xtemp = x*x - y*y + x0
y ... = 2*x*y + y0
x = xtemp
... /> color = palette[iteration]
plot(Px, Py, color)
}
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... than 3 comparison/jumps (3 x 14 cycles same as 42 ... forum. The question was Z80 assembly related which is more general ...Game code view DebuggerHi Is opening up a game such a manic miner in a debugger such as spin going to give me a true view of the code used in developing the game? Cheers
... . Both games have fragments of assembly code left in memory, and ... you could happily write commented assembly on the machine itself in ... (the precursor to Mac OS X) and then later switched to ...Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... br /> ; NOTE: this will convert (x,y) 0, 0..191 to ... ,0 ; first clear the x,y coords (b=y, ...
rlca ; divide x by 8 and multiply by ... 4
and 224 ; mask off bits we don't ... :)
;ld a, c ; x coordinate
;rrca ; only need ...Optimal shifting for set pixel?Hi, I'm optimizing my set pixel code. For speed. But without using partitioned memory (i.e. a table on 256 byte boundary) I have optimal memory addr…
... QUOTE=Jimmy Falcon;771188]g0blinish, X is a passed value, not ... routine and the rest of X is used to calculate ... />
LD A,(bw+X);
bw:db #80,#40 ... [CODE]
;DE=Y.X
PLOT PUSH HL,BC:LD H ... .
to use plot some data must be prepared ...Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... />
get_attr_address:
; use the x, y coords in de to ... HL
ld a,d ; x position.
rrca ; multiply by ... in l.
and 3 ; mask bits for high byte.
x*32 again.
and 224 ; mask low byte.
So shooting 360 degrees?...[I]How do I go about having - for example - a cannon in the middle of the screen, that can shoot in any direction towards the player?[/I] Well, I do…
... as being a line plot between two points, you ... shl 1
plot(x0, y0)
...
for x from x0 + 1 to x1 ... y = y + 1
plot(x, y)
D = D + ... dy - dx
else
plot(x, y)
D = D + ...So shooting 360 degrees?...[I]How do I go about having - for example - a cannon in the middle of the screen, that can shoot in any direction towards the player?[/I] Well, I do…
... . In other words, treat X and Y as a 16 ... part. When you want to plot your pixel, you use the ... repeatedly add them to the X and Y co-ordinates. ... angle, so 'opposite' is the X-distance, and 'adjacent' is the ... . So you divide the X-distance by the Y-distance ...So shooting 360 degrees?...[I]How do I go about having - for example - a cannon in the middle of the screen, that can shoot in any direction towards the player?[/I] Well, I do…
... 772794]When you want to plot your pixel, you use the ... such as [CODE]while (x < max(x)) x++;[/CODE] becomes really messy ... fail because next value for x++ is 0 and it ... is still less then max(x). ( [I]or you could ... do a check for x < max(x) or overflow but ...
