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  • 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 …

    ... to look up the table for every byte, which ... an address itself for this table. for example:
    ... br /> ld a,(hl) (table is precalculated in such a ... actual looking through the table. The only weak point ... 4 more registers for storing table address)

    ...
    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 …

    ... I understand correctly in your table the first 2K contain the ... />
    How about if the Table was arranged in 8 blocks ...
    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 …

    Using the alternative table arrangement I suggested will save ...
    dmsmith dmsmith August 2004 Development
  • RGB values for Spectrum colorsDoes anybody know the true rgb color values for the spectrums 15 colors. I'll assume that black is 0,0,0 White is probably 255,255,255 But what are t…

    ... , quite right. I compiled the table taking the palette information from ...
    monty.mole monty.mole 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 …

    ... wrote:
    Using the alternative table arrangement I suggested will save ... improve the speed using Your table layout.
    I repeat, that ...
    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 …

    ... disable interupts.

    My table is arranged:

    Each ... first 512 bytes of the table contain all the bytes from ...
    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 …

    ... with sprite mirroring (also using table!), but this is too much ... stack.
    [quote]
    My table is arranged:
    Each byte ... first 512 bytes of the table contain all the bytes from ... up the code using this table variant.
    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 …

    ... />
    ORG C000H,C000H ;placing table at the beginning of
    LD H,C0H ;table with preshifted mask bytes for ... A,B0H ;there is a table with all bytes preshifted to ...
    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 …

    ... H" when working with big table just killed me with their ...
    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 …

    The bit I'm most proud of is using the L register for two tasks, as the index for the byte table and also to store the mask. If that hadn't worked I don't think it would have been possible to do without using the alternate registers.
    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 …

    Using a shifted byte table makes a lot of sense. I had always been stumped about how to do large sprites. Even for small sprites preshifting them uses a lot of memory.
    Good idea Moroz.
    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 …

    ... /> You will need a Jump Table with the addresses for each ...
    dmsmith dmsmith August 2004 Development
  • Best games voting system -The "Best Games" right now shows Spectrum CP/M to be the "best game", when in fact it is not a game. Also isn't there something inherently wrong if…

    ... straight to the high score table without so much as a ...
    jil jil August 2004 Sinclair Miscellaneous
  • 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] ; ***********…

    ... save time by accessing the table via HL. Particularly if you ... the arrangement of the sprite table dependent on the order in ... sprite address into it's table and only fully recalculate it ...
    AndyC AndyC 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] ; ***********…

    ... sprite address into it's table and only fully recalculate it ... , these are read from the table, is this what you mean ...
    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] ; ***********…

    ... , these are read from the table, is this what you mean ...
    AndyC AndyC 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 …

    ... ,A
    LD H,C0H ;table with preshifted mask bytes for ... ) ;calculate screen address using a table
    LD L,A
    table
    * SCRTAB must be at ... />
    * Routine to generate a table of shifted bytes.
    * each ...
    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 …

    ... though, I did an extended table aeons ago. Don't know ...
    AndyC AndyC 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] ; ***********…

    ... hl,0FE00h ;Building up a table with
    ld bc,0FDh ...
    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] ; ***********…

    ... also created a look up table for the "xpos" gfx offset ... at FC00, get the offset table horizontally
    LD C,(IX ... hl,0FE00h ;Building up a table with
    ld bc,0FDh ...
    robpearmain robpearmain August 2004 Development
  • Anyone fancy a "meet up" in September?I have a weekend off in September, 25th/26th September, the only one until Xmas, and am postng this invite on a few boards that I post on. I live in…

    ... rid of the last pinball table, a couple of years ago ...
    thx1138 thx1138 August 2004 Sinclair Miscellaneous
  • RGB values for Spectrum colorsDoes anybody know the true rgb color values for the spectrums 15 colors. I'll assume that black is 0,0,0 White is probably 255,255,255 But what are t…

    ... full range with a small table:

    [code]static const ...
    obo obo August 2004 Development
  • Sprinter Project dead ?Is the Sprinter project dead ? There is nothing at the website: [url="http://www.eng.petersplus.ru/"]http://www.eng.petersplus.ru/[/url] [ This M…

    ... I should go under the table and bark.
    Anyway - here ...
    Yerz Yerz August 2004 Sinclair Miscellaneous
  • Music / particlar bands, you associate the Speccy 48k ( while playing all those years ago ).About 3 of 4 friends used to pile round to my next door neighbours house, most nights playing the Speccy 48. This friend of mine had a brother who wa…

    ... were frequently on the spin table while playing were: "We are ...
    Alessandro Tommasi Alessandro Tommasi August 2004 Games
  • Anyone know the address mappings...of the hardware resources on the speccy; From the screen display address range to all the hardware control registers. etc. Where can I get access t…

    ... by using a Sprite data table beginning at 64000.
    10 ...
    dmsmith dmsmith September 2004 Development
  • Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…

    ... by using a Sprite data table beginning at 64000.
    10 ...
    dmsmith dmsmith September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... opcode as per GOC's table or any other basic z80 ...
    Dunny Dunny September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... look *that* up in this table, not the old one"
    Dunny Dunny September 2004 Development
  • What hardware Sinclair and not related has everybody got?Just had to try to list all my clutter in the attic and my dads garage (this has got a bit out of hand), anybody else got as much Retro as this (boug…

    ... /> 1 Binatone Game System (plays table tennis and other games)
    Ian Hamilton Ian Hamilton September 2004 Sinclair Miscellaneous
  • 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 …

    ... HL,0FE00H ;BUILDING UP A TABLE WITH
    LD BC,0FDH ...
    robpearmain robpearmain September 2004 Development
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