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New horizontal scrolling gameI have just been working on this for the last months. Heres a snapshot, let me know what you think. [url="http://www.geocities.com/ruijtunest/rtun…
... give me a link to tht player code or send it to me ... . Hmm, I'll look at the code when I find it ... I really don't now how to code fx for the speccy.[/ ... Playing the sfx on a third channel of the AY ... noise generator, thus freeing up the processor for important work ... -
Convert x,y to Attribute Address in AssemblyWhat is the fastest way, given x,y (in hl) to return the attribute address?
... to save 30-odd t-states at the expense of a 512 byte ... lookup table, you might want to consider this:
[code ... x in a:
(start with ld a,h to satisfy the ... 255
[/code]
EDIT: lookup has to be on a 256-byte boundary, of ... -
ZX ShedNow that issue 2 is out and it's fairly obvious it's been a great success, we have to start considering issue 3. Thanks in part to the quality of wri…
... a good look and from my point of view....
Difficult to ... you considered having a small zip file with the code as text ... ) It might be nice to see how to make a simple game (I mean ... really simple, pong or a 2 ... -
ZX ShedNow that issue 2 is out and it's fairly obvious it's been a great success, we have to start considering issue 3. Thanks in part to the quality of wri…
... I mean. ITRW I would look at say 3 reviews of ... have no problem selecting the code & pasting it into SPIN ... ) It might be nice to see how to make a simple game (I mean ... work once the website is up so that graphic & sound ... -
ZX ShedNow that issue 2 is out and it's fairly obvious it's been a great success, we have to start considering issue 3. Thanks in part to the quality of wri…
... the more advanced material. The how to code columns are fine for beginners ... 's type-in was a little closer to the mark but what ... .
As mentioned by a previous poster, I'm past ... lost how much I liked reading the mag, and I look forward to ... -
Development advice I was an user of the Spectrum 48K in the old days. I arribed to learn a lot of BASIC, and a bit of assembler. The time have passed, and now I am …
... />
maybe you should have a look at my TommyGun tool. Its ... 's), Tile based maps and Code in the assembler of your ... Guide, there is a tutorial that shows how to create a fully working game ... -
Wide sprites in SP1 + Z88DKThe calls to sp1_CreateSpr(); and sp1_AddColSpr(); seems to have changed. Could someone please offer help in how to create a wide (wider than 16 pix…
... please offer help in how to create a wide (wider than 16 ... uchar sp1_SprId2Type(uchar id);
[/code]
For the create ... index into the draw table to select a sprite draw function for ... "plane" is 0-256 with 0 meaning closest to viewer.
Graphics in Basic??What is the fastest way to draw high rez graphics in Basic. Andrew.
... can I obtain information on how to do this??? and... ... to restore the original character set?[/QUOTE]
Fire up BASin, look ... on how) to point to your set - 256. You can define up to 96 ... that editing a program under regular emulation will look quite ...TZX revision 1.20 finalSince everybody seems to agree with the last propositions, the specification for the TZX file format revision 1.20 now becomes final and you can find…
... had very little clue as to how tape loading actually [i]worked ... complex for a guy who didn't even know how to code in z80 ... supposed to be simple! Of course, I can look at the code now ... back to edge loading if it can't flashload a block... How do ...Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... /> For examples of how to do a basic editor have a look at
[url ... load the code back in but you'd have to make a special ... you keep going thro' the code, moving your bp as you ... option would be to do a write up to show everybody how to do it and ...Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... and pasting from a screen capture. Got an illustrated table of all ... I had to do it by hand. Luckily the table was at ... ]For examples of how to do a basic editor have a look at....
...When ... it up some number of bytes? Or do you scan the code ...Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... />
Not sure how to write a program to compress the data in ... crumby compared to what the pros can offer :-):
[code]
... STOP
5250 GO TO 5040[/code]
scr is the ... C700)
dpos is just a byte counter through the uncompressed screen ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... that many different characters to draw (say, only a maximum of 32 ... />
inc de
to
inc e
a few T-states. You'll want your sprite data to be aligned ... on a 256 byte page boundary (so instead ...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…
... to post mine. :oops: But here goes nothing!
[code ... increment h to pixel line aligned address
dec a
... 18592, 18624, 18565
[/code]
The routine ... a 24 address table with each address representing a 8 byte aligned ...Game ideaThinking of a game that could enter the Minigame compo I came to the following idea for a game, although it might not fit 1K or 4K: A mazed snake ga…
... thinking on giving it a go for the ZX81, ... I can read how to poke a character on screen ...
[code]1000 LET DFILE=PEEK 16396+256*PEEK 16397
code]
Time to write a nice small ... asm library to use in z88dk ...He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…
... uses that as the high byte for a look-up table of addresses. The hardware ... CPU calls the address pointed to by the two bytes at ... then filled the entire 256-byte block with that byte to make sure the ...New assember ideaAs i work with Eclipse IDE in my job i become more and more lazy. This leads me to idea that it is time to left Notepad+Tasm combo behind and move on…
... go for option where one byte is getted from first bmp ... file and following byte is from second bmp file ... .
[b]relocateable code[/b] ok, i know how to do it just ... space. There should be a relocate table for every lib function. There ...Development IDE collaborationI was wondering if other people making development IDE's (MetalBrain, LCD , Claus Jahn and Carlinski as far as I know) would be interested in combini…
... ;) )
Should I write some code to demo things? (please don't ... tended to mock-up my apps and pass pictures around of how the ... took a good hour or so to just figure out how to create a new ... all the very best, and look forward to seeing the result.
Spectrum more loved than C64It just occurred to me that the Spectrum must be more loved than the C64 these days. After all, it has been more than a year since an update was made…
... br /> Offers almost all the 256 colour remakes for the Spectrum ... br /> Haven't got a clue how to play a certain game? This archive ... might contain a full RZX ... an adventure or a complete solution in one go? Look no further ...Spectrum more loved than C64It just occurred to me that the Spectrum must be more loved than the C64 these days. After all, it has been more than a year since an update was made…
... br /> Offers almost all the 256 colour remakes for the Spectrum ... br /> Haven't got a clue how to play a certain game? This archive ... might contain a full RZX ... an adventure or a complete solution in one go? Look no further ...Head over Heels on the C64Dunno if this' a good place to bring this up :D I've been comparing Head over Heels versions and the C64 version is way inferior, everytime there's…
... how the CPC version could be faster. Okay, the CPC has a ... can be only speeded up using a 256 Byte LookUp table. I know it ... because Retro-X does the conversion to ... time to figure out the correct table contents (Thanks to Wilko ...Head over Heels on the C64Dunno if this' a good place to bring this up :D I've been comparing Head over Heels versions and the C64 version is way inferior, everytime there's…
[QUOTE=LCD;281166]I wonder how the CPC version could be ... can be only speeded up using a 256 Byte LookUp table. I know it because ... Retro-X does the conversion to ...How to convert hex bytes to .. in assembly?I hadn't a clue what to put in the title so..., I have in memory 3 hex bytes #10 #34 #50, e.g.,[code][size=2]#6400 10 , 34 , 50 ; hex 25600 16 , 52 …
... You should be able to find some code (in whatever language ... code.
Barring that have a look at RLD and RRD to extract a ... in BCD format in a byte as "AB" then ... byte stored is "A*16+B". You want to convert that to ... then there's always a look up table.VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... />
1. The game speeds up when no key is pressed ... m/c and how to mix Basic and machine code on the VIC ... /> ;Set PTR2 to point to WORMPOS data
LDA #WORMPOS%256
STA ... store new position in A & WORMPOS TABLE
TYA
LDY ...Filmation... how does it work?Does anyone know exactly how Ultimate's Filamtion works? There's an explantion of the room layout and graphics at [url]http://retrospec.sgn.net/users…
OK, I've found how it was done for ... the position it's moving to.
Redraw ... a 256 byte
buffer) in order from the back of the room to ... the front (I kept a linked
... area from the small buffer to the screen.
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I just learnt that Spectrum has 1kB of unused ROMWell, man learns through all his life. I have just discovered that Spectrum has over 1 kilobyte of unused ROM memory, from address 14446 to 15615. Al…
I was originally going to use some space in this ... execution trap (a 256 byte area) for the Spectranet indirect call table. Then I ... ROMs had code here so it was liable to end in a crash ... it is (with a very small 8 byte entry point area right ...Skool Daze disassemblyWhile developing [url="http://pyskool.wordpress.com/"]Pyskool[/url], I've also been putting together a disassembly of Skool Daze and Back to Skool, m…
... to get the game to fit into 128K![/QUOTE]
How ... the play area, and how many sprites are there?
a 256-byte "mirror" lookup table) to obtain the right-facing ... />
Back to Skool also used a lookup table to access text strings ...Playstation vs. N64 vs. SaturnIn another thread ( [URL]http://www.worldofspectrum.org/forums/showthread.php?t=20482&highlight=xbox+360[/URL] ) we discussed the virtues and quali…
... to get a release, a good few of which still hold up to ... an enjoyable strategy title to boot. For shmup fans ... it was so hard to code decently for (it was ... nobody had any idea how to code well for it), so ... where you need to know where to look to find the real ...how to reflect a byte's bit-pattern in assembly?I'm trying to use 16 pixel-wide graphics which are symmetrical around the vertical, i.e. if the left byte is 01001110 the right byte will be 01110010…
Use a lookup table aligned on a 256 byte boundary. Then you have a fixed high byte address and the byte you're reflecting becomes the offset into the table.
Of course you still need to build this table with ugly rotate opcodes first!
