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<1234567…34>
  • tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…

    ... wrote a small routine to rotate right a whole screen character ...
    ld a, 31 ; 31 chars
    bucleattr2: ld c, a ...
    na_th_an na_th_an November 2006 Development
  • How to rotate an imageI'm working on an idea for a game and to test it I want to draw some graphics on the screen which are made up of 8x8 pixel squares (single characters…

    ... part, if I want to rotate the image (in 90 degree ...
    Mr Millside Mr Millside January 2008 Development
  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…

    ... 's if I could simply rotate one 90 degrees. This is ... -screen option to select and rotate any selected piece.

    mik3d3nch mik3d3nch November 2017 Sinclair Basic
  • Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…

    ... times (for 8 pixel high chars)
    rowloop:
    ; set iy ... 's width
    fastwidthloop:
    ; Rotate pixel through carry to output ... width
    widthloop:

    ; Rotate pixel through carry to output ...
    Sol_HSA Sol_HSA December 2018 Development
  • how do i make a character rotate in very small degrees?so i would take the letter a and rotate it degree by degree until it has gone round 360 degrees. only 8x8 pixels is necessary. machine code or basic …

    ... take the letter a and rotate it degree by degree until ...
    digital digital September 2019 Development
  • 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…

    ... ) since each column is 3 chars tall and each 8-pixels ... portions of the sprite that rotate right into the last character ...
    Alcoholics Anonymous Alcoholics Anonymous July 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…

    ... /> }

    // prints double width chars without any formatting
    // s ...
    // n = max number of chars of s to print
    rotate left one pixel row in ...
    Alcoholics Anonymous Alcoholics Anonymous July 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…

    ... is 24 pixels tall (3 chars tall) each mountain row is ... but we still need to rotate the mountain graphic right by ... to retrieve screen addresses for chars in rectangle
    }
    [/code ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Development
  • tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …

    ... the msb of the horizontal rotate table to use and the ... a linked list of sprite chars occupying the character so this ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • My first platformerHi all! How do you do? Been lurking here for a while, but never had the courage to join the forum. :) The Speccy was my first computer, so I've alw…

    ... single draw function to all chars in a given column. ... possible to create independent sprite chars (struct_sp1_cs only with help ... want the engine to horizontally rotate sprites (as with preshifted ... height = height of sprite in chars. This will include the blank ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ... /> strms equ 0x5c10 ;
    chars equ 0x5c36 ;
    chans equ ... call get_addr ;+
    ld hl, (chars) ;
    udg2:
    add hl ... ) ;
    sll a ;+ pre-rotate left once to get the ...
    rotlp:
    srl l ; Rotate the character definition into the ...
    chev chev April 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... /> strms equ 0x5c10
    chars equ 0x5c36
    chans equ ... call get_addr ;
    ld hl, (chars) ;

    udg2:
    ... hl) ;
    sll a ; pre-rotate left once to get the ...
    rotlp:
    srl l ; Rotate the character definition into the ...
    chev chev May 2011 Sinclair Basic
  • 40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…

    ... column code. It assumes CHARS points to a 6x8 character ... /> strms equ 0x5c10
    chars equ 0x5c36
    chans equ ... call get_addr ;
    ld hl, (chars) ;

    udg2:
    ...
    rotlp:
    srl l ; Rotate the character definition into the ...
    chev chev August 2012 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ... . They can be NR (no-rotate) type, meaning the engine does ... once at update. Because the chars are iterated in the same ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Development
  • Why are rotozoomers on C=64 so fast ?Hi, I noticed rotozoomers on C64 are really fast. I'm not the best coder on Speccy but I know my pet I never succeed to do rotozoomer (or rotating ch…

    ... br /> games like nebulus, they rotate the tower, the characters are ... flick the bank to rotate the tower 1 pixel ... can pump data thru chars (think of them like ... you can scroll the chars internally as well as ... t relise you only rotate specific chars.. so you don' ...
    fog fog June 2014 Development
  • Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…

    ... will be used - SCR and CHARS.

    [youtube]22RDef4Oyi8[/youtube ... /> Press 1 or 2 to rotate through the render options.
    jp jp November 2014 Announcements
  • Elite - Galaxy Creator Pokes.So 8 meagre galaxies are not enough for you? Tired of visiting the same old 2048 planets over and over? Say no more, these "Galaxy Creator" pokes wil…

    ... x) /* rotate 8 bit number leftwards */
    /* (tried to use chars but ...
    tomas tomas February 2016 Games
  • Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…

    ... screen the engine has to rotate the sprite right by 0 ...
    Alcoholics Anonymous Alcoholics Anonymous April 2016 Development
  • 2x2 tile to attribute blocksHow do you go about converting a 2x2 tile to 16 x 16 attributes? Heres an example of the tile data I'm wanting to enlarge. [code] defb 255, 25…

    ... LD B,4 ; 32 chars of a line (4 bytes ... LD B,3 ; 24 chars of a line (3 bytes ... next square
    RLA ; rotate the byte left
    < ...
    MatGubbins MatGubbins September 2016 Development
  • 2x2 tile to attribute blocksHow do you go about converting a 2x2 tile to 16 x 16 attributes? Heres an example of the tile data I'm wanting to enlarge. [code] defb 255, 25…

    ... LD B,4 ; 32 chars of a line (4 bytes ... LD B,3 ; 24 chars of a line (3 bytes ... next square
    RLA ; rotate the byte left
    < ...
    MatGubbins MatGubbins September 2016 Development
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... at most 16 pixels wild chars)[/quote]

    I'm ... results. But FZX needs to rotate 2 bytes and it doesn ...
    Einar Saukas Einar Saukas October 2016 Development
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... at most 16 pixels wild chars)[/quote]

    I'm ... results. But FZX needs to rotate 2 bytes and it doesn ...
    Hikaru Hikaru October 2016 Development
  • Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …

    ... method over to a dirty chars backbuffer. Well that's my ... , i.e. specific keys that rotate in fixed directions at all ...
    Hikaru Hikaru October 2019 Games
  • Which coin-op classics still need a great Speccy conversion?Most of my faves have been done in the last couple of years - Turtles, Kung Fu Master, Rally-X, Mr Do, the Space Invaders and Pac-Man emulators, the …

    ... method over to a dirty chars backbuffer. Well that's my ... , i.e. specific keys that rotate in fixed directions at all ...
    Rev_Stuart_Campbell Rev_Stuart_Campbell October 2019 Games
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... since they only produce printable chars in basic in extended mode ... shift). All the other printable chars which previously required extended mode ... ; clear carry flag
    rra ; rotate right including carry
    jr ...
    Paradigm Shifter Paradigm Shifter August 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... I want to include escape chars (required for quotes inside a ... ; clear carry flag
    rra ; rotate right including carry
    jr ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... ; clear carry flag
    rra ; rotate right including carry
    jr ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... ; clear carry flag
    rra ; rotate right including carry
    jr ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
<1234567…34>

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  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…
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