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<1…14151617181920…34>
  • 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…

    ... column, bit 5 = 1 last row, bit 4 = 1 clear ... properties means each individual 8x8 pixel sprite character making up ... Here are the sp1_ClearRect() prototypes from the SP1 header file:
    if (se->s->row > 21) // if sprite ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 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…

    ... previously drawn graphics from another character in the pixel buffer. Arrange for ... the last blank column (and row) will still not be drawn ... to accommodate vertical pixel placement. Normally, the blank row below each column ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…

    ... h from 7 to 8, moves it to the first pixel row of ... you need to subtract 8 from h to get it back ... safe on valid screen addresses from lines 0-190 and not ... a line on the screen from lines 0-190.
    Kiwi Kiwi May 2006 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…

    ... /> if (srow < (dr->row + dr->height)) {
    temp ... described in the rectangle in row-major order (left to ... is incremented to the next row of the second rectangle. Then ... the same relative position as the update struct from the first rectangle ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 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…

    ... move sprites to their initial position on screen after they ... over the rectangular area in row-major order (left to ... 10; // current count counts down from an_rate
    uchar **frame_seq = ... port) to select key row and the lower 5 bits ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…

    ... command to grab a number from the memory refresh counter. Only ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • New game: MPTHRILLA: The Metal MinerHi all, I&#180;m glad to announce you the news of having new Speccy game for you to play... :) [URL="http://art.speccy.cz/art.htm#own"]MPTHRILLA: …

    ... interesting game which would benefit from being converted to a Manic ... to stand on the bottom row;
    * allowing the player to ... . to take the player's position into account when pixels collide ...
    andrewbroad andrewbroad July 2006 Games
  • Is Sabre Wulf a good game?Because i've never played it but i have the original cassette so is it worth booting up, or is it one of those games that's almost impossible to fini…

    ... one side of a keyboard row). What lazy programming.
    [/quote ... creatures to move to a position where they were either easily ... much that I ran away from the computer and had to ...
    Dunny Dunny July 2006 Games
  • New game: MPTHRILLA: The Metal MinerHi all, I&#180;m glad to announce you the news of having new Speccy game for you to play... :) [URL="http://art.speccy.cz/art.htm#own"]MPTHRILLA: …

    ... interesting game which would benefit from being converted to a Manic ... to stand on the bottom row;
    * allowing the player to ... . to take the player's position into account when pixels collide ...
    de Vandemar Croup de Vandemar Croup July 2006 Games
  • Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…

    ... />
    When something moves you calculate the area of the screen ... both it's original position and its new position, do this to ... byte edges horizontally and to the pixel ... on the screen in 2 pixel increments) - so when I needed ...
    robpearmain robpearmain August 2006 Development
  • The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…

    ... , with a register indicating pixel row to start from. For horizontal just have ... bytes fetched (describing 8 pixels) from the same scan line and ... think a more substantial improvement from the 48 to the 128 ...
    Alcoholics Anonymous Alcoholics Anonymous October 2006 Sinclair Miscellaneous
  • Spectrum Screen Memory MapWhat's the advantage (mistery?) behind ULA's spectrum screen memory interpretation? 6144 bytes divided into 3 blocks, 2048 bytes long. if you want t…

    ... one pixel (or one byte in left right case) from a current position ...
    Alcoholics Anonymous Alcoholics Anonymous October 2006 Development
  • Xenon TriOxide (Xeo3)I just wanted you all to know that a new cross platform game has started development (well the +4 version has been around a while, but my colleague f…

    ... goes through all of them from the left to the right ... (!) and from the top to the bottom ... already but one pixel right to the correct position.
    so scroll ... them to the left by one pixel.
    Fikee Fikee November 2006 Development
  • Scrolling Loader CounterPlease can someone help me with writing a scrolling counter for a loading system. I like the Hewson counter so i`ve taken the font from zynaps loade…

    ... one digit on char position by something like this:< ... /> inc h ;move one pixel down
    djnz repeat ; ... time it will display from 2nd to 8th line ... ld (gfx_of_number), hl ;the move from the end of gfx to ...
    Fikee Fikee November 2006 Development
  • Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…

    ... />
    sp1_MoveSprPix() accepts pixel coordinates so you don't ... prevent colours of sprites from bleeding into neighbouring ... on screen position and rotation (data available from the struct_sp1_ss) ... have background graphics coming from anywhere in memory. ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Games
  • +3 Drive B ConnectorI've heard some people say the pinout in the manual for the +3 is incorrect and is actually in reverse. Does this mean that pin 34 on the connector i…

    ... wires on the top row and the even wires ... on the bottom row. You can therefore just ... wires (holes) furthest away from the red stripe, this ... get MFORMAT.TAP (Multiformatter) from WOS (look at "additional ... have to reverse the position of the wires you ...
    Jmk Jmk January 2007 Hardware
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... the aliens that enter from the edge of screen, ... it doesn`t effect the position of the aliens. Anyway, ... the attribute, subtract it from 127, and POKE it ... screen are POKED there directly from the memory location (PEEK ... get things displayed in row 22 and 23 of ...
    48K 48K February 2007 Development
  • EHIS vs MD2The poll of Polls

    ... your defenders back in position when you sent Gary ... Ablett would be back in position to defend the ball. ... to worry about the position of every player I ... favourite tactic for scoring was from the centre. Just run, ... 5 times in a row against you mate either.< ...
    Collie Collie March 2007 Games
  • Bubble Bobble EditI thought I might have a go at editing Bubble Bobble myself after reading this... [url]http://www.worldofspectrum.org/forums/showthread.php?t=15452[…

    ... after another. Taking the 1st row yet again >
    ... be first segment on row 2.
    So poke ... the number, type and position of the baddies at ... test purposes as the row only works to a ... br /> The colour scheme goes from 858C-8599. Poke different values ...
    Mr. Anonymous Mr. Anonymous April 2007 Development
  • Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…

    ... be scrolled and continually updated from memory.
    [/quote]
    Is this pixel scrolling or byte scrolling btw ... sprites are placed at pixel resolution or character resolution ... the 8-bit keyboard row in the 16- ... specific key in the row. (Make sure you ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • And It's Arrived...The ZX Spectrum is now 25 years old. Yay!!! Happy Birthday. Necros.

    ... /> You just gotta position the jump from the right pixel perfect (or as ... quirky features go pixel imperfect ...
    dm_boozefreek dm_boozefreek April 2007 Sinclair Miscellaneous
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... /> 1. Get byte to paint from character set.
    2. Write ... first column of the next row of text - just INC L ... where the next pixel is the next screen row below this one ... work out where the next pixel shoudl be in the frame ...
    Winston Winston April 2007 Development
  • Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…

    ... to move sprite by 1 pixel at 25 fps, it's ... say you'd use 2-pixel step in x-axis, thus ... POP instruction to fetch graphics from memory:
    [code]
    ; in ... />
    - if you need to calculate, think what can be pre ...
    omega omega May 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... : the raster, is that the position that the TV plots at ... /> Does it move from left to right from the very top of ... the sprite (for example one pixel to the right) and just ... />
    One last quick question from Blood Baz's example:
    Rickard Rickard May 2007 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…

    ... allocate memory for sprite structs from queue 0
    return ... // allocate memory for char structs from queue 1
    }
    row > 21) // if ...
    ;GRAPHIC DATA:
    ;Pixel Size: ( 16, 24)
    ; ...
    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…

    ... symbols global and visible from other files that declare ... br /> pop bc ;; clear parameter from stack
    ;; hl = ... wrapper() function from asm to move down a pixel line -- ... = new display address down one pixel row
    [/code]

    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... a pixel row for the speccy in assembly. One is to calculate the ... the Y address of each pixel row.

    But are there ... y co-ord of a pixel row efficiently? It would be interesting ... the worst calculating parts and calculate the rest. Here are some ...
    Metalbrain Metalbrain July 2007 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ... /> 1) Work out the memory position of the first character line ... /> 2.2) work out memory position of the next character line ... row/column character
    ; The ROM routine gets the line start from ... the row number in B, trashes ...
    hldswrth hldswrth 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…

    ... the local variables from the stack and ... uchar __LIB__ *zx_cyx2saddr(uchar row, uchar col);
    ... call that function from asm directly like so ... djnz once for each pixel row, I think you ... /> #endasm

    // from this point on im2 is ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... ;Test: fill complete row
    ld a,h ... and 7 ;sub char-row.
    inc h ... ;increment h to pixel line aligned address
    from c
    ld ...
    Arjun Arjun July 2007 Development
<1…14151617181920…34>

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