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<1234567…34>
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... make_room equ 0x1655 ; create buffer routine
    ... br /> attr_p equ 0x5c8d ; permanent attribute

    ; -----------------------------------------------------------------------------
    attribute value in A
    ld ...
    chev chev May 2009 Development
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... is in the way the attribute bytes are interpeted.
    ... an attribute cell's ink and paper to the same value, to ... is set to the present attribute value, imitating normal spectrum behaviour. ... remaining one for handling the attribute counters.

    I' ...
    Basher Basher August 2013 Hardware
  • Arcade conversions, automatically convertedHi! My first post, be gentle with me :smile: I was creating for a hobby project of mine (a completely non-speccy-related, unfortunately) a postproce…

    ... source pixels to compute one attribute value - for the best results 8 ...
    arttu arttu October 2014 Games
  • Where does the ULA+ store its palettes?The ULA+ palates are saved as TAP files, what is the exact address of the colour tables and how are they configured? Can you change the colour val…

    ... /> Can you change the colour value of say INK 6, PAPER ... keep changing but the actual attribute value wont?
    daveysludge daveysludge August 2015 Development
  • Why doesnt this work???Simple piece of code wont do as it should, just want to fill the top 22 lines of screen with an attribute value (150) but it wont have any of it. Som…

    ... lines of screen with an attribute value (150) but it wont have ...
    daveysludge daveysludge October 2016 Development
  • Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…

    ... or bat has the correct attribute to do something. Any other ... ) ; a now holds the required attribute value
    [/code]
    I was ... in assembly with a return value. Ie
    like a function ...
    ivanb303 ivanb303 November 2017 Development
  • print at line 22 and 23I have a faint recollection of POKES to allow print at 22,x and 23,x, anyone know what they are? (rather than using the print #0 #1 stuff..)

    My way to print at line 23:

    [code]

    10 POKE 23659,0 : IF Y
    Dr BEEP Dr BEEP October 2005 Sinclair Basic
  • print at line 22 and 23I have a faint recollection of POKES to allow print at 22,x and 23,x, anyone know what they are? (rather than using the print #0 #1 stuff..)

    ... colors. Therefore you select the ATTRibute value with the PEEK and later ...
    gasman gasman October 2005 Sinclair Basic
  • Atari STSaw one recently at a used scrap dealer, but didnt buy it seeing as it dosent have my particular interrest. I could probably bargain for it for only …

    ... gives you more colours per attribute block). The ST could manage ... ColourDraw mode also changes the attribute value 8 times in one 8x8 ...
    Tom-Cat Tom-Cat November 2005 Chit chat
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... a colour (a standard Spectrum attribute).

    sp1_PutTilesInv() iterates ... is reset to the rate value, and the countdown begins ... into the array containing an attribute value and a tile code. ... will return a non-zero value if it is. in_JoyKeyboard() ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Basic Programming Routine Needed . . . HELP!Hello there, I though i would try and redo an old classic (pacman) in basic . . . BUT . . . I can't remember how to write the code to see what chara…

    ... ,x) will give you the attribute value at location y,x, encoded ...
    gasman gasman June 2006 Sinclair Basic
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... using table of pre-calculated attribute values. It's pretty fast ... :
    LD A,(DE) get attribute value
    LD L,A HL ... position of new attr value
    LDI move attribute from table to ...
    TABLE:
    DB $00 Attribute value 0 -> 0
    DB ...
    omega omega April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... using table of pre-calculated attribute values. It's pretty fast ... :
    LD A,(DE) get attribute value
    LD L,A HL ... position of new attr value
    LDI move attribute from table to ...
    TABLE:
    DB $00 Attribute value 0 -> 0
    DB ...
    bobs bobs April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... general routine to set attribute value to required bias (level ... need to store original attribute data in the memory ... transforms source attributes into given attribute level (bias). See:
    attribute "bias" immediately without former ...
    omega omega April 2007 Development
  • 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…

    ... ,CC
    // \x14\xAA set attribute to AA
    // \x01 set ... , screen address from column coordinates, attribute address from screen address, screen ... we duly poke with the attribute value. An alternative would have been ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... be correct as the last attribute value is read at 14342!
    attribute byte only. Also, the memory ...
    csmith csmith September 2007 Emulators
  • Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…

    ... 'd get the usual spectrum attribute pattern, but here you've ... 's not returning a consistent attribute value for a given character position ...
    csmith csmith December 2007 Hardware
  • Development IDE collaborationI was wondering if other people making development IDE's (MetalBrain, LCD , Claus Jahn and Carlinski as far as I know) would be interested in combini…

    ... find/replace on a certain attribute value to add transparency - all of ...
    bobs bobs January 2008 Development
  • 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…

    ... graphics-only definition and an attribute only definition of the same ... apply the mask to the attribute value before it is written out ... writes out 1 mask value (with the attribute mask applied if required ... I have just checked the attribute output and it is ...
    Kiwi Kiwi February 2008 Development
  • 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…

    ... apply the mask to the attribute value before it is written ... .

    Anyhow, since attribute masking on a character level ...
    Only fixes the SevenuP Attribute output.[/QUOTE]

    It ... a snippet of one sprite (attribute only):

    [ ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 Development
  • ANN: ColorPRINTColorPRINT gives you 256 fully programmable Timex mode 2 characters (maximum 16 colours per character if you have bright black) to use in your 48 BAS…

    ... intending to use a single attribute byte as an identifier to ... replace that with a single attribute value that is used to look ... routine could grab the current attribute byte to locate the eight ... attribute values.

    Use of ...
    Alcoholics Anonymous Alcoholics Anonymous September 2008 Sinclair Basic
  • Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…

    ... /> ld a, (de) ; get the attribute value
    ld c, a
    Paradigm Shifter Paradigm Shifter February 2010 Games
  • Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …

    ... by side in one attribute cell) and the attribute value changing in the ...
    gasman gasman March 2011 Development
  • 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…

    ... counter by an appropriate value after executing consecutive instructions ... -bit per pixel for RGBA value. Yours may vary.
    ... attribute map of speccy (offset 22528 ). Set the RGBA value ... algorithm to get equivalent attribute value for x,y positions ...
    Arjun Arjun June 2011 Emulators
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    ... sprite area covered with an attribute value with the same ink and ... the right addresses in the attribute memory to change the ink ... care of using the same value for ink and paper to ...
    mcleod_ideafix mcleod_ideafix September 2011 Sinclair Basic
  • Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…

    ... , it fills it with the value $02 (00000010b). When this ... On the other hand, the attribute area is filled with flash ... at, it follows that the attribute value the ULA is reading is ... POKE all screen (including attribute area) memory with value 00100010b (34 decimal ...
    mcleod_ideafix mcleod_ideafix October 2011 Hardware
  • 128k multicolour graphics...ok over the years I've been a fan of multicolour graphics on zx spectrum, an I clearly get that on a 48k the (8x1@2)multicolour limit stands at 18cha…

    ... you one colour change per attribute for free, which means ... can get four colours per attribute with basically no work ... Megademo which repeats the same attribute value across the line...)
    ... you control over *when* the attribute change happens on screen - ...
    gasman gasman November 2011 Sinclair Miscellaneous
  • BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…

    ... screen memory[/QUOTE]
    Write attribute byte.
    [QUOTE]INC HL ... ]
    No, black on green attribute value.
    [QUOTE]L3 LD (HL ...
    ccowley ccowley December 2011 Development
  • BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…

    ... , Green Paper.

    Write attribute byte.

    Man, you ... />
    No, black on green attribute value.

    Yeah, right back ...
    ooze48k ooze48k December 2011 Development
  • Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…

    ... tint the whole screen to attribute 0 (or to any atribute ... />
    Where x is the attribute value. Do a LD(HL), L ...
    na_th_an na_th_an January 2012 Sinclair Basic
<1234567…34>

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