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A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
...
; A' = Pixel mask
; H'L' = Screen Address of pixel
ret
;; Like the above, but to the RIGHT
set => update ATTR
ld ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... the Speccy display to the screen...
[quote]
2 ... 'm using 32-bit per pixel for RGBA value. Yours may ... 8 bits in the 'pixel', if it's set (1) look up ... this you need to basically set/unset very specific bits in a ... -
ZX-Paintbrush version 2.2 releasedDear readers, Today I released ZX-Paintbrush 2.2 with many new features. I hope you'll like it. Please refer to ZX-Paintbrush's section of my homepa…
... once on the picture will set/unset the pixel at that position, depending ... 100%). Then create a new SCREEN$ with enabled Timex mode.
screen is in Timex mode. ... a function "Create Timex screen from Spectrum screen". But the opposite is ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... -right to reduce the screen, then work down from ... is that if one pixel is set, either above, to the side, ... it's a fairly empty screen pixel-wise. I also tried ... Caped Crusader[/I] loading screen, which has a lot ... that adapt to each screen, but this simple method ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... areas starting at any pixel position on the screen - which is complicated ... re-ordering to get the screen data in sequential order. Then ... to reduce the number of set pixels. Then use (a) ... to encode short patterns of set/unset pixels, until a big gap ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... re-ordering to get the screen data in sequential order. Then ... to encode short patterns of set/unset pixels, until a big gap ... I'm not sure if pixel-based back-referencing would work ... to reference previous sequences with pixel precision. Thus repetition would be ... -
ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…
... draw a line on the screen with those settings (remind: colour ... [/IMG]
As a pixel set line doesn't change already ... by drawing pixels on pixel set areas with set INK colour, e.g ... converter often produces inverted 8x8 pixel areas, you see above. -
endless runner project..So I'm thinking of writing a small tutorial series on writing games for the speccy in C, and figured that an endless runner would be an easy example …
... scrolling, clearing a window on screen, etc.
In ... need a real 100% cleared, pixel set clean screen?
or do i ... clear the screen?
with a line purge as above or a ... although you could clear the screen directly, this won't communicate ... -
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…
... />
.set6
set 6,(hl)
;as above
;.set5 ... ...39 Z80 clocks per each pixel set in the main loop (depending ... draws directly to the Spectrum screen and avoids redundant checks when ... -
New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... of screen pixel area
-b2 @ bottom right of screen pixel area ... .
The above work fine for most snapshots ... br /> [b]Alternate Loading Screen (-s screen.scr)[/b]
As ... it with another compressed screen with the original loaded ... -
Stuck again! Please help meI'm in the process of making a little game, eventually it will become rather more sophisticated (I hope) but I am testing out routines one at a time.…
... />
You understand that the screen is made of two parts ... screen, it looks to see what is already there. If a pixel ... ) if there is no pixel set for this pixel then it will be ... start the above process - and of course, for every pixel of the ... -
Incorrect loading screen for ACEI noticed that the loading screen for [B][URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0000056&loadpics=3"]ACE[/URL][/B] in the archive is t…
I noticed that the loading screen for [B][URL="http://www ... www.worldofspectrum.org/showscreen.cgi?screen=screens/load/a/gif/ACE ... not use any loading screen and the picture above is actually the ... title screen in the game after ... -
Heist 2012 wrong loading screenThe screen currently set as loading screen for [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0002278&loadpics=3"]Heist 2012[/URL] is the gam…
The screen currently set as loading screen for [URL="http://www.worldofspectrum. ... has finished. The real loading screen is similar to that of ... -
RND cyclical behaviourGood evening. I'm playing with RND function to show its cyclical behaviour, i.e. after 65536 calls to it, the next one will return the same value of …
... screen, pixel by pixel, and stops when it finds the same point already set ... -
2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…
... overhead than a regular, full screen scroller.
Any ideas ... quickly find the bits to set/unset?
I think I ... it does scroll the whole screen, but I think others must ... -
Z80onDSK now compatible with +3e with ZXMMC or similarJust updated my utility to work on Spectrums equipped with +3e ROMs and IDE storage. I've tested this with ZXMMC at the moment but don't think there …
... ║ 1: @16384 (top left of screen pixel area)
║ 2: @22511 ... (bottom right of screen pixel area)
║ 3: @23296- ... snapshot name is used as above)
║
║ ... code located top left of screen pixel area
║ ... -
The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... the above info the ULA is built to get the screen from set ... -
Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... /> ; Converts a screen pixel coord into a screen address and ;
; pixel position ;
screen address from the above routine.
[CODE ... -
MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... approach the bottom of the screen otherwise they would get there ... on by selectively dropping pixel rows, mainly above the invaders and below ... -
Port problem with either EightyOne or FUSEA bug in EightyOne's keyboard handling has now been fixed.
... border before the first contended pixel to afterwards (not yet modelled ... have the first pixel of the main screen area set to 14321, and ... border from the first main pixel down, which is close to ... -
graphics on the speccy...how?I'm curious, coming from a background in computer graphics, what was the drawing app of choice for speccy graphics in the game industry? how did arti…
... ) and set unset individual pixels... is this what they term pixel art, or ... -
Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... h,96 ; start pixel at centre of screen
ld l,128 ... mask = leftmost pixel set
call fill ; fill from new screen position
; hl = screen address
; b = incoming pixel mask
Graphic equalizer m.c. program neededBack in the 90's I had a full-screen attribute equalizer that was simple, yet very impressive. We used to listen to Vangelis or Jean M Jarre by conne…
... ) Rendering the array to the screen in some fashion.
screen shot (item 2 above). Once the attribute colours have been set ... to do is POKE the screen with 0 or 255 bytes ... "boosting" the left most bit set on the timer.
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... "decoding" the Y-pixel value - treat the screen as a solid 6144 ... bit 15 and 14 are set then discard (the 25% waste ... will provde the inter-byte pixel to set.
The remaining 11 ... the byte within the 3rd screen to set.
{busy going ...Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... it. For example 0 (no pixel set). In such case you could ...
PUSH HL
Above routines needs to be "generated ...Fastest fill m.c. routine ever?What is the fastest fill routine you've ever seen? Is there a listing somewhere? Most games and adventures that use fill routines were considered slo…
... figure4.tap in the example set linked above. I was actually inspired ... that it was filling entire screen bytes at a time rather ... nature of the flood fills above I don't think a ...Looking for cursor routineIt's been a long time since I programmed a little bit in Basic, so I decided to create a simple cursor routine: [url]http://db.tt/SPnSdpx[/url] I k…
... of a proportional font on screen having set the sp to video ... a full third of the screen text with such a font ... correct pixel position, in addition to simply copying bytes to the screen ...SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…
... following, it seems to set the vmpr to the lmpr ... , so I get my screen address starting at 0, ... working. (I want the screen at 0, a buffer at ... the value using the code above but substituting hmpr with ... /> By default is the screen pointer set to page 30?
...SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…
... the value using the code above but substituting hmpr with vmpr ... guess video and lower is set to 30 / 31? and higher ... ;485794]By default is the screen pointer set to page 30?
