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<1…17181920212223…34>
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... as data to show address calculation).


    lpt defw ...
    ASM ASM October 2010 Development
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... boot code to make the calculation easy. The BASIC load filename ...
    ASM ASM November 2010 Sinclair Miscellaneous
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... boot code to make the calculation easy. The BASIC load filename ...
    Arda Arda November 2010 Sinclair Miscellaneous
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ... 1
    230 LET ar1=ATTR (y,0)
    240 LET ... ar2=ATTR (y+1,0)
    250 ...
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ... 1
    200 LET ar1=ATTR (y,0):
    LET ar2 ... =ATTR (y+1,0):
    PRINT ...
    Einar Saukas Einar Saukas November 2010 Sinclair Basic
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ... 1
    230 LET ar1=ATTR (y,0)
    240 LET ... ar2=ATTR (y+1,0)
    250 ...
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…

    ...
    210 LET b(2)=ATTR (b(1),0):
    LET ... b(3)=ATTR (b(1)+1,0):
    Paddy Coleman Paddy Coleman November 2010 Sinclair Basic
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... as data to show address calculation).


    lpt defw ...
    sekrets sekrets November 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... as data to show address calculation).


    lpt defw ...
    ASM ASM November 2010 Development
  • inverting graphics using basic?just curious if it could be done by poking screen memory ? and what's the structure. (foreground / background for each char ? ) reason I ask is I'd …

    ... :
    [code]Attr(new) = (Attr & 192) | ((Attr & 56) / 8) | ((Attr & 3 ...
    BloodBaz BloodBaz December 2010 Sinclair Basic
  • inverting graphics using basic?just curious if it could be done by poking screen memory ? and what's the structure. (foreground / background for each char ? ) reason I ask is I'd …

    ... :
    [code]Attr(new) = (Attr & 192) | ((Attr & 56) / 8) | ((Attr & 3 ...
    Arda Arda December 2010 Sinclair Basic
  • New SpecBAS available - Procedures and Functions.Go here: [url]http://www.zxspectrum4.net/forum/viewtopic.php?f=6&t=17[/url] And get the latest if you're interested. I've added procedures and func…

    ... expressions are sitting on the calculation stack ready for you to ...
    Dunny Dunny December 2010 Sinclair Miscellaneous
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... modifies the member "cs->attr" of each sprite character, where ...
    Digital Prawn Digital Prawn December 2010 Development
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... lookup table or fairly complex calculation. The three-part screen structure ...
    Arda Arda January 2011 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... take into consideration that the calculation of starting address would be ...
    Metalbrain Metalbrain January 2011 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... take into consideration that the calculation of starting address would be ...
    TVzombie TVzombie January 2011 Hardware
  • Screen$ command, ROM routineHi All, Does anyone know which ROM routine to call for the Screen$ command (and/or the ATTR command)? Any comments on how well it works or the spee…

    ... Screen$ command (and/or the ATTR command)? Any comments on how ...
    Dr BEEP Dr BEEP January 2011 Development
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... "") so many games have used ATTR to detect colours of UDGs ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Sinclair Basic
  • Gigascreen - programming guideDoes anyone know of a programming guide for the 128K gigascreen screen mode, specifically a persistence colours table, some code (pref. C level or BA…

    ... of the most accurate palette calculation schemes available.

    Or ...
    moroz1999 moroz1999 February 2011 Development
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    In assembly, the calculation is far more simple to do. Check this link for info:

    [url]http://chuntey.wordpress.com/2010/03/22/sprite-graphics-tutorial/[/url]

    Interesting read, and nice code snippets.
    na_th_an na_th_an February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... like horizontal, and initial address calculation is much faster.

    TVzombie TVzombie February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... like horizontal, and initial address calculation is much faster.
    [/QUOTE ...
    AndyC AndyC February 2011 Sinclair Basic
  • Wiwo DidoI started coding a new game for the ZX Spectrum called "Wiwo Dido". This is not only the name of the figure, but also short for the action it can d…

    ... ) done.
    @2) finally right calculation of returning address. Took me ...
    Dr BEEP Dr BEEP February 2011 New game ideas
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... /> It may make screen address calculation (not a slow operation at ...
    AndyC AndyC February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... ]It may make screen address calculation (not a slow operation at ... ) marginally quicker[/QUOTE]
    Address calculation for the spectrum screen is ... lookup tables iirc.
    Address calculation for the column-by-column ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... three instructions longer, pixel address calculation would have been a bit ...
    Jonathan Harston Jonathan Harston February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... three instructions longer, pixel address calculation would have been a bit ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Dandy by Electronic ArtsHas anyone ever completed this? You collect all the 3 clues and then nothing happens????

    ... the amount used in the calculation, so I think you can ...
    Jmk Jmk February 2011 Games
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Related Threads

  • Pentagon 8x1 attr mode - what's the POKE?There isn't one. It's an OUT.
  • Big un-attr'd spritesHi all,<br /> <br /> I'm trying to find or come up with a generic sprite routine that can handle large (128x64) sprites. I've looked at DrwSprNC in t…
  • Using ATTR detection in machine codeIs there a ROM routine that can be called that reads the ATTR value of a co-ordinate?
  • Optimize this: Distance CalculationBased on a taylor series expansion, suggested by NA_TH_AN, I've got this so far, which is far far faster than SQR(X^2+y^2)<br /> <br /> Formula is: i…
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  • Jetset Willy ATTR Buffer 2Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2?<br /> <br /> H5C00 D23552.<br /> <br /> Thanks
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  • ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX<br /> <br /> also i would like to be able to change the colours and not have a shadow. <br /> <br /> http://www.wor…

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