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<1…12131415161718…34>
  • Two colour nice Spectrum screen$Im wanting some 2 colour Spec or SAM screens to use as backgrounds in my OS... i.e. black and white, blue and back etc etc... not using attributes an…

    ... `s 16 colour, with any pixel being able to be any ... `s loads of programs to get you used to the machine ...
    CKay CKay August 2004 Development
  • Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …

    ...
    ; A returns pixel point
    EX DE, ... LD HL,TAB ; table for pixel
    LD C,A ... DE,HL ; get address
    XOR (HL) ; reset pixel
    LD ... You can also calculate the pixel, but it's only ...
    Dr BEEP Dr BEEP August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... xcoord. AND 7 to find pixel position and multiply by 96 ... /> Let us know how you get on

    Derek
    dmsmith dmsmith August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... of 512, one for each pixel position.
    and each block ... register pair, because you could get to the corresponding "half" simply ...
    dmsmith dmsmith August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... end of the line things get messed up. It won't ... then just use POPs to get the data. This speeds it ... same way but shifted one pixel right, and so on.
    dmsmith dmsmith August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... end of the line things get messed up. It won't ... then just use POPs to get the data. This speeds it ... same way but shifted one pixel right, and so on.
    moroz1999 moroz1999 August 2004 Development
  • need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …

    ... />
    LD A,C ;taking pixel position
    ADD A,A ... counter
    LD A,(SPRXLEN) ;get width of sprite
    DEC ... L
    LD A,(DE) ;Get the screen contents
    AND ... ,C
    LD A,(HL) ;get right side of mask
    dmsmith dmsmith August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ...
    ; based as opposed to pixel based system

    ; ...
    LD A,(IX+0) ; Get Current X Position
    INC ...
    PrintSprite:

    ; Get beginning of graphics for sprite ...
    robpearmain robpearmain August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ...
    ; based as opposed to pixel based system

    ; ...
    LD A,(IX+0) ; Get Current X Position
    INC ... graphics address

    ; Get beginning of graphics for sprite ...
    robpearmain robpearmain August 2004 Development
  • An emulator(another on of my projects) Does anyone know how to write an emulator? The emulated computer is very simple (a MK14, infact -also by Sir Clive) and a…

    ... things like having a 30 pixel high scroller bobbing across the ... out screen address for a pixel and setting it in that ... join the club, do I get newsletter?
    CKay CKay August 2004 Development
  • If there's ONE thing that......frustrated you about the spectrum when you were a kid (not now) what would it have been? 1) The attribute colour problem 2) The sound 3) The size…

    ... /> PLOT 100,150;"ABC" for pixel perfect positioning.

    DRAW ... as it allowed me to get the maths homework done.
    MatGubbins MatGubbins September 2004 Games
  • 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 …

    ... ; Get GFX for char and add offset based on pixel position ...
    LD A,(DE) ; Get Mask
    AND (HL) ... /> LD A,(DE) ; Get Graphic
    OR (HL) ... H ; *256 TO GET NEXT LINE
    LD ...
    robpearmain robpearmain September 2004 Development
  • 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 …

    ... ; Get GFX for char and add offset based on pixel position ...
    LD A,(DE) ; Get Mask
    AND (HL) ... /> LD A,(DE) ; Get Graphic
    OR (HL) ... H ; *256 TO GET NEXT LINE
    LD ...
    robpearmain robpearmain September 2004 Development
  • 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 …

    ... ; Get GFX for char and add offset based on pixel position ... /> LD A,(DE) ; Get Graphic
    OR (HL) ... /> LD A,(DE) ; Get Graphic
    OR (HL) ... /> LD A,(DE) ; Get Graphic
    OR (HL) ...
    robpearmain robpearmain September 2004 Development
  • On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…

    ... slows it down). If you get rid of the AF' ... is).

    To get shearing-free copies you will ... you see shearing on several pixel lines as a result.< ... is do the copy in pixel line order. This is ... this time before starting your pixel-line order copy, you ...
    Alcoholics Anonymous Alcoholics Anonymous September 2004 Development
  • Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…

    ... positions to allow for 2 pixel scrolling. Then left side of ... will be blank. When I get it up and running I ...
    dmsmith dmsmith September 2004 Development
  • Why relativly bad colour on Spec compared to other 8bit?Why relatively bad colour on Spec compared to other 8-bit machines like the Master system or even c64? I understand the 8x8 block that you could hav…

    ... to build each screen to get the right colours, etc. This ... , is 8*1 and any pixel in this row of 8 ...
    Sadako Sadako September 2004 Games
  • 8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…

    ... starts on, you can achieve pixel perfect scrolling by literally moving ... quite a flexible. You can get byte at a time scrolling ... additional hardware registers to control pixel scrolling in both directions and ...
    AndyC AndyC September 2004 Games
  • games written using game writng programsI was reading through some issues of crash not long back and one article was about some 16 year old that wrote Frank n stein for the speccy(never pla…

    ... any game you make you get a "Made with Gary Kitchen ... I didn't know better. Pixel smooth Sprites and scrolling, etc ... wondering if I could ever get anything to work. I didnt ... were advertised as such to get interest. Real "no coding necessary ...
    Sadako Sadako September 2004 Games
  • making games on a real speccy-------------------------------------------------------------------------------- i have recently bought a speccy on ebay and i want to try to make s…

    ... it isn't going to get you any benefits - you still ... to use Sprites (or any pixel by pixel animation) unless you fall ... compiled BASIC nowadays, you'll get laughed out of the office ...
    Dunny Dunny October 2004 Games
  • Screen$Is there a quick way to get pictures off a PC e.g. from MS Paint, onto the spectrum without having to type in each individual pixel before saving the…

    ... there a quick way to get pictures off a PC e ... to type in each individual pixel before saving the screen$[/quote ...
    cyborg cyborg October 2004 Sinclair Miscellaneous
  • Can Anyone explain sprites in Jet Pac/Atic Atac etcJet Pac was 16k, and yet the sprites were impressively fast. I notice they had a slight flicker at times, but were notmally pretty flicker free. W…

    ... /> ; Draws a 16 pixel wide sprite (variable height)
    ld c,(hl) ; get last screen address and store ... /> ld e,(hl) ; get new graphic address
    inc ... /> ld c,(hl) ; get last graphic address and store ... br /> ld a,(hl) ; get sprite height + store
    ...
    robpearmain robpearmain October 2004 Development
  • How can I scroll a line of text and wrap perfectlyI know this is easy for most of you but for some reason I am messing it up. In Assembly Language I want to do the following: I have 1 line of text …

    ... to do is when you get to the start of the ... , PUSH HL and you should get your line scrolled. To do ... do for the left most pixel I'm sure - quicker ways ...
    cyborg cyborg October 2004 Development
  • Painting under XPHi, can anyone reccomend me a good, simple painting program that will work under Win XP ? I was looking for something similar to MS Paint (fairly si…

    ... program too.
    I actually get frustarted because today's applications ... 's get really too unnecessary complicated.
    Plus, at a low pixel ...
    Arm73 Arm73 November 2004 Sinclair Miscellaneous
  • Amstrad CPC Emulator?After reading a favourable comment on one of the other threads, I fancy having a look at what the CPC had to offer, since I've never really had the c…

    ... the emulator at 125% to get the same speed and performance ... been saying all along - to get the same performance from the ... need hardware sprites in those pixel-colour screen modes. THere's ...
    b00mzi11a b00mzi11a November 2004 Sinclair Miscellaneous
  • Help required to calculate screen addressesDoes anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of …

    ... calculates the screen address one pixel below the given address ? Is ... near the bottom, you'll get an article about the pattern ... move up or down by pixel amounts.

    If you ... or down by a single pixel (or :cool:, it is faster ...
    Alcoholics Anonymous Alcoholics Anonymous November 2004 Development
  • Idea for a new feature to compliment a debugger in an emulatorI had an idea for an emulator feature yesterday. Don't recall having seen this idea before, but I'm sure you'll correct me if it has. :) In that cas…

    ... game reads and writes - to get an idea of where and ... in a window where each pixel is equal to one memory ... darker the "closer" you would get to the heart of the ...
    mel the bell mel the bell December 2004 Emulators
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