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Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... graphics output never outperforms the raster - as otherwise can happen due ... . This is also the principle behind clipping the sprites vs the ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... you can get using the behind the raster draw. The code below ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... screen copy being right up behind the raster. If your screen copy ... is trailing behind (e.g. it takes ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... of buffer can be renewed behind the raster.
By keeping ... -
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... in attributes for a row behind the raster, then completing that row ... before the raster comes round again. Kind of ... -
64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... and avoid running into the raster. The other problem is seeing ... one line, start filling in behind the raster, then switch to filling ... in in front of the raster until the end of the ... when, to stay behind or just ahead of the raster, you need ... -
Games with good scrollingI know the Speccy's forte was not scrolling games but their must have been some that not flick screen and maybe even smooth! I remember playing a few…
... redrawing just behind the TV's line-by-line (raster) refresh, trying ... everything done as the TV raster ran ahead and went on ... brief period that the TV raster sweeps over them, then they ... -
Games with good scrollingI know the Speccy's forte was not scrolling games but their must have been some that not flick screen and maybe even smooth! I remember playing a few…
... That you start just behind the raster, so it doesn't ... show if you lag behind ... - you have until the next raster catches ... getting ahead of the raster) then draw new sprites ... all done before the next raster caught up.
Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... (starting to render just behind the raster scan and finishing just ahead ...20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... multicoloured characters [I]before the raster gets there[/I]. Then, ... them again properly as the raster actually arrives. That first ... This is the main idea behind the "anti-flickering mechanism" ... comment "synchronize with the raster beam" to find the ...Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... , then you redraw the background behind the raster, then you draw sprites ... sprites), then you redraw background behind the raster, start drawing sprites for ...Frames Per SecondHow many frames per second did the ZX Spectrum run at? I've found games that are 12.5fps but Ive recently been informed some games were at 25fps ...…
... is the animated trail left behind. The background is pre-drawn ... to avoid the TV refresh raster).Screen buffer Tip from Raff CeccoRaff very kindly gave me this tip: "Incidentally, I remembered a trick I used on the Z80 for extra speed: When clearing the screen buffer, it was a…
... with new interrupt, wait when raster is done with top border ... , going down. You are behind a raster so your changes will be ... interrupt
3. Meanwhile raster reaches bottom of the screen ... top.
4. Now raster chases you, so you should ...Megatree DevelopmentHi All, I have been messing around with developing a concept for the unwritten game Megatree. Here is a video of what I have so far written on a 48…
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[I] Willy could run behind the Mega-tree trunk[/I ... to appear. There was a raster split between bitmap (top section ...Advices for double buffering ?Hi, I'm currently coding graphics routines for a forthcoming game, I use a double buffer (the dummy screen is at $e000, the code at $8000) to pro…
... bottom in a linear fashion behind the raster beam etc. If there ... case, copying the buffer behind the raster is still a good idea ... order to avoid flicker. The raster comes across the top of ...Advices for double buffering ?Hi, I'm currently coding graphics routines for a forthcoming game, I use a double buffer (the dummy screen is at $e000, the code at $8000) to pro…
... writing to the screen just behind the raster.
I use ...Fast way to clear the screen ?So I was wondering fastest way to clear the screen. I've tried this and this works but is it better than CLS ? LD HL,16384 LD BC, 6144 Loop…
... ; you're not following the raster that's drawing the screen ... through memory so can run behind the raster that's redrawing the ... ahead of, then falling back behind, the raster. The only way to ...Manic Miner RunHi, For fun I started developing a iOS game based on Manic Miner. It is a left to right runner. I don't even know if it would get through the Appl…
... you could do all that behind the raster on a 48K, but ...ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next
... be in the next are raster interrupts (vbi and horizontal scan ... this, you will be left behind if you do not have ...What is the maximum fps the spectrum can achieve?I have been doing some reading and from what I understand the Spectrum outputs a PAL signal, but that means it will display @50fps or @25fps? If t…
... to the display, just behind the TV raster scan of one frame ... game sprites before the TV raster comes round again in the ...Loadsa bullets on screen (silkworm)Did games like silkworm just draw everything to the screen or did they have complicated optimisations? and the types of games where sprites can occu…
... . Then there’s the draw behind the beam trick. Next, there ... top border) and starts drawing behind the raster beam. Tons of games ...ATARI 2600 PORTSThere's a few Atrai 2600 games I've loved and would like to see ported to Speccy - anyone fancy? I know 'Yars Revenge' got a great reboot... The gu…
... , you can kill them from behind.
I haven’t ... . And very well-suited to raster chasing. The key to porting ...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…
... beam, then immediately even rows behind the beam. The buffer layout ... the screen ahead of the raster? I'll give it a ...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…
... in between passes of the raster it'd be OK. Maybe ... so the copy starts right behind the raster, to give it the ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... and just after where the raster is on a line, to ... row of colour data just behind the raster, so it shows up ... line just ahead of the raster so it all appears to ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... head-on collision with the raster.
Doing more than 16 ... to avoid colliding with the raster. It's not simply a ... copy attributes just behind, then just ahead of the raster, to give ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... artifacts from lines being drawn behind the raster at the moment, especially ...Whos Your Favourite Game Programmer ? Mine's Keith Burkhill, Mike Lamb. Its the people behind Commando, Arkanoid. There are others cant remember their names, I'll continue later [img]/_…
Mine's Keith Burkhill, Mike Lamb.
Its the people behind Commando, Arkanoid.
There are others cant remember their names, I'll continue later [img]/__forums/images/smiles/icon_smile.gif[/img]
SpectrumerA picture of me and my Spectrum circa 1984 8o)<a href="http://www.fotango.com/p/eba00132841f00000010.jpg From" target="_blank">[url]http://www.fotango.com/p/eba00132841f00000010.jpg[/url] From<…
... /interface3} hard to make out behind keyboard
alphacom 32 printer ...
ZX80
Scrabble behind that balancing ontop of a ...Rabbit softwareSomebody once told me that one of the main guys behind Rabbit software, committed suicide when the company was sued for making a speccy version of mo…
... one of the main guys behind Rabbit software, committed suicide when ...
