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Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... plot. This and the mountain array "struct mtn g_mountains[]" (from ... as the position of the TV raster.
SP1' ... 8 ) within the 5x9 array of plots corresponding to the ... graphic, else lookup in tile array)
struct sp1_cs *slist; // ... -
Quick bioOMG! - so this is what the internet was created for! and all that time i thought it was all about porn! ;) i've finally found somewhere to share my…
... at a time when the TV raster is known to be at ... -
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... that it can cross the TV's raster several times in a ... 2, etc. so that the raster will only cross the copy ... the interrupt so that the TV raster is always ahead of your ... -
Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
... ; 1 frame so the TV's raster will draw these partially erased ... that it occurs when the TV raster will not cross any sprite ... new coords -- so that the TV raster crosses a minimum number of ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... /> So it converts the "real" TV screen position to the correct ... , does the size of the TV raster "plot" equals to a Spectrum ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... to the TV output circuitry as the raster moves from ... does the size of the TV raster "plot" equals to a ... of the raster. This is because the TV display is ... two adjacent even and odd TV lines.
... the pixel as the raster moves from left to ... -
Spectrum Hardware Emu!Well, not really but it may be of some interest to you speccyphiles over here! It was certainly inspired by the good old rubber keyed one! [URL="ht…
... , so is capable of simple TV raster generation and games with some ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... about 14000 cycles before the TV raster begins drawing the top pixel ... ) and 2- know where the TV raster is so that all drawing ... -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... order, which means if the TV raster catches a glimpse of intermediate ... visual difference. And since the TV can only show a snapshot ... 2/50s (update every two TV frames) which gives you ... screen. This happens when the TV draws an incompletely scrolled display ... -
Sinclair Light Gun and modern tellies/monitorsDoes the Sinclair Light Gun work with modern LCD/TFT/plasma screens? I have my Speccy linked up by TV card to a PC outputting to a LCD monitor, and …
... fake timing compared to the TV raster scan. It would have to ... -
Sinclair Light Gun and modern tellies/monitorsDoes the Sinclair Light Gun work with modern LCD/TFT/plasma screens? I have my Speccy linked up by TV card to a PC outputting to a LCD monitor, and …
... fake timing compared to the TV raster scan. It would have to ... -
Framerate of Spectrum gamesI was reading a bit about framerates in modern games and it got me wondering about the Speccy. First off I'd hoped to find what framerate my old gam…
... is necessarily tied to the TV framerate. On the spectrum this ... effects connected to where the TV raster was at any moment -- things ... -
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 …
... the timings of the TV display from the hardware ... much of the current TV frame that loop took ... All the recent emulators simulate TV-raster drawing, so you can do ... data above the line the TV is currently drawing, you ... no change in the TV picture until the next ... -
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 …
... /> 4. No synchronization with the raster is done. This means there ... synchronize screen updates with the TV raster. Because only completed graphics are ... it shearing) is, if the TV raster happens to pass through a ... -
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 …
... /> 4. No synchronization with the raster is done. This means there ... synchronize screen updates with the TV raster. Because only completed graphics are ... it shearing) is, if the TV raster happens to pass through a ... -
Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... way, by the time the TV raster displays the first line, the ... -
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…
... just behind the TV's line-by-line (raster) refresh, ... everything done as the TV raster ran ahead and went ... precise synchronisation with the TV is why some of ... the timing of the TV refresh. The sprites in ... brief period that the TV raster sweeps over them, then ... -
Gameboy advance Speccy emulation?I have heard , but can not find clear / understandable info on emulating the spectrum on a Gameboy Advance... but it is apparently possible? Using '…
... , so games that relied on TV raster timing or multicolour effects will ... -
display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... ]
If "screen redraw" (TV raster scan) happens when a sprite ... -
How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... /> In a Spectrum 48K, each TV raster scan pass takes 224T, with ... -
How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... every 8 iterations (when the TV raster scan moves to the next ... -
How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... " replace attributes on screen during TV raster scan. Both BIFROST* and BIFROST ... -
Game loopJust working on my first ever Spectrum game, and am struggling to work out what the game-loop should look like. I've got interrupts enabled (mode 2)…
... corner is drawn by the TV raster. The raster proceeds left to right ... file is traversed by the TV raster.
Why is ... busy erasing things while the TV raster crosses the area being ... finish these operations before the raster catches up with you. ... -
draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…
... change that happens when the TV raster scan is jumping back to ... -
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…
... the display, just behind the TV raster scan of one frame of ... the TV. [i]Green Beret[/i] just ... the game sprites before the TV raster comes round again in the ... takes two frames of the TV, hence 25fps.
[i ...