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ZX Alien BreedNot sure if this has been mentioned already (I did trawl the threads but couldn't see anything :smile: ), but I've always hankered after a Speccy Ali…
... /> Rather than a full, 8-way scroll I'm opting for a ... -
Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
You can also use an 8 byte lookup table, pack 16 sets ... 4 bits into 8 bytes, so the first byte of the table ... flipped (one nybble each), next byte would be %0010 and %0011 ... -
Test your PC keyboardPlease test yout PC keyboards in ZX emulator. Searches for the appropriate keyboard for real ZX Spectrum / ZX emulator. This is keyboard tester: [url…
Everything works with Spectaculator 8.0, but
RIGHT+UP+0
A+F+G
Z+V+B
X+V+B
fail. Tested with a PS/2 Microsoft Internet Keyboard. -
is this a forum for new games ideas as in really new gamesWhat I mean is Nebulous was a new game concept, [cylindrical scrolling?] and I am having difficulty coming up with new concepts. Seems my brain just …
... something to scroll sideways and I'll scroll it for ... Give me something feasible to scroll sideways on a spectrum... ... 4 (or was it 8 speed?) scroll for a sonic game, ... Joffa's COBRA "PUSH scroll" routine, and posted it ... source code of that scroll - didn't allow ... -
Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
... large sprites, but maybe the scroll is too fine to make ... as with "Wonderboy". Then a 8-pixel scroll is the solution. -
really dumb questionbut can I use the following line to create a udg and if so how do I call it or use it via the graphics mode? Do I need to READ something somewhere? …
... quick graphics. Yipee!
DEFB 8,24,63,127,63,24 ... 8,12,126,127,126,12,8,0 ; B right arrow
DEFB 8 ... ,28,28,127,62,28,8,0 ; D down arrow
really dumb questionbut can I use the following line to create a udg and if so how do I call it or use it via the graphics mode? Do I need to READ something somewhere? …
... quick graphics. Yipee!
DEFB 8,24,63,127,63,24 ... 8,12,126,127,126,12,8,0 ; B right arrow
DEFB 8 ... ,28,28,127,62,28,8,0 ; D down arrow
really dumb questionbut can I use the following line to create a udg and if so how do I call it or use it via the graphics mode? Do I need to READ something somewhere? …
... quick graphics. Yipee!
DEFB 8,24,63,127,63,24 ... 8,12,126,127,126,12,8,0 ; B right arrow
DEFB 8 ... ,28,28,127,62,28,8,0 ; D down arrow
mirroring bitsIf I have a string of 1408 bytes, each of which has one bit 'b' set, what's the shortest way of mirroring that string, so that each bit set at positi…
... for the sake of it :) 8 byte table at any address and ...mirroring bitsIf I have a string of 1408 bytes, each of which has one bit 'b' set, what's the shortest way of mirroring that string, so that each bit set at positi…
... for the sake of it :) 8 byte table at any address and ... , but if you use a 8-aligned table instead, it will ...mirroring bitsIf I have a string of 1408 bytes, each of which has one bit 'b' set, what's the shortest way of mirroring that string, so that each bit set at positi…
You can use an 8 or 16 byte lookup and mirror each half of the byte separately. (16 possibilities for a 4bit half-byte, you can pack 2 into each byte for an 8 byte table, 16 bytes otherwise).From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... ): LET da=FN p(23639)+8
13 RANDOMIZE FN a ... rows of 32 characters, but 8-byte bit patterns are needed to ...New Game: Sun Bucket[IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/loader_zpsbc757e08.gif[/IMG] [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhugh…
Level 8 is a right pig if you're trying to get M O R E correctly. Jeeps.Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…
... :
LET bit=x-8*INT (x/8)+1:
LET p ... +175. 'b$()' is a 256*8 byte array of BIN strings from ... pixel position within the addressed byte. The first two statements convert ...Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... (only need to plot the 8 byte chars to the desired location ...Simple text scroller, first character problemin a text scroller, whole line scrolled to the left by 1 pixels using RL(HL) ; DEC L method. But at the rightmost character must be printed immediate…
... /> Otherwise, you need your own 8 byte buffer to draw the character ... in, then shift each byte of it to move a ... before you start rotating each byte of what's on the ... diagonally (one pixel rise in 8 ), ripple, or move up and ...Simple text scroller, first character problemin a text scroller, whole line scrolled to the left by 1 pixels using RL(HL) ; DEC L method. But at the rightmost character must be printed immediate…
... /> Otherwise, you need your own 8 byte buffer to draw the character ... in, then shift each byte of it to move a ... before you start rotating each byte of what's on the ... de,buffer
ld b,8
loop:
push hl ...GFX viewer from TZX/SnapshotsHello All, I use Spin .7 to view memory of games so I could find the GFX, but it's very buggy, does anyone know of something similar?
... /> byte 6 byte 12 byte 18 byte 30
byte 7 byte 13 byte 19 byte 31
byte 8 byte ... 14 byte ...What would have been the hardest game to write?<div>I was recently think about Code Masters' Fruit Machine Simulator and what a piece of **** that would have been to code. I bet it brought in some…
... like having all the sprites 8-byte aligned. From reading Bob Page ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... /> ld d,a ;high byte sorted
ld a, ... /> ld e,a ;low byte sorted
inc ix< ... holding ASCII, multiplies by 8 and points HL at graphic ... ret
;
print_tall_char: ;prints 8 byte graphic addressed by HL at ... lines
ld b,8
ptclp ld a,( ...Consolidating forum categoriesI posted this elsewhere, but it should probably go here: [quote="Rorthron;857978"]As an aside, can we consolidate the various topics on New WoS in…
... so you always had to scroll to get to the old ... ]
and i have to scroll right down to the bottom for ...ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... /> That you include a 6-8 byte code snippet at the beginning ...Code optimisation! 16bit number to 5 digit stringJust for interest this one, any thoughts on how to make this as fast as possible? Little optimisations to this routine or a complete reimagining? …
... ,
A little modify, 8 byte longer but faster solution:
8 bits
ld bc ...Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …
What about printing into separate bytes on screen?
Then you need only to scroll right part without and/or-ing. And sometimes refresh left digit.Revenge of the bits of inlay games quiz!Hi all Here's another bunch of games to spot from inlay segments. Some are probably very easy! Again, apols if they're a bit small :grin: [IMG]http…
... , it was awful! It did scroll right-to-left though, which was ...z88dk sp1lib with fzxThe numbers dont seem to display properly? fzx by itself works [quote] // for targets supporting fzx // zcc +zx -vn -startup=31 -O3 -clib…
... the letter A to the 8-byte udg definition at address 30000 ...
sp1_TileEntry(' ' + i, font_8x8_bbc_system + i*8);
// now sp1 uses ...How to automatically find the character set in a gameThis is all completely new to me, so please be patient. I've done some reading up on how character sets are handled by the Spectrum. I understand tha…
... now to sample every 3 * 8 byte block in the binary, compare ...Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…
... possibly even a 4 to 8-byte keyboard buffer;
[b ...My new Punk music radio showHi folks, just posting that i now do a punk music radio show on the internet if anybody fancies a listen, i play punk, OI!, folk punk, goth, bit of t…
... Barefoot (5:13)
8. King Hammond - Right On King Hammond (3 ...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... /> ...
FF00-FF7F
right half
F080-F0FF
[/code]
Moving one byte column right becomes "inc h:jr z ...
