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Search Again :: Adv Search 1000 results in 0.022s
<1…9101112131415…34>
  • 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…

    ...
    inc h ;move one pixel down
    djnz repeat ;repeat ... last thing you have to add is a simple check which ...
    Fikee Fikee November 2006 Development
  • 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…

    ... ,(de) ; get first byte in pixel row
    ldd
    pop ... byte into last byte of pixel row
    inc h ; down ...
    ld a,l
    add a,31
    ld l ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Development
  • 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…

    ... ,(de) ; get first byte in pixel row
    ldd
    pop ... byte into last byte of pixel row
    jp pe, scanline ...
    ld a,l
    add a,31
    ld l ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Development
  • PngConvRight. Thought I'd move this to a new thread, simply because I can. If you've not been reading the thread about [URL=http://www.worldofspectrum.org/…

    ... for ZX development. Until I add colour support (it's on ... threshold (0..127 is pixel off, else pixel on). You can load ... required format.
    When I add proper colour support I'll ...
    icabod icabod December 2006 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... m/c program, you could add parameters to the end of ... . How can you plot a pixel (look it up), how can ... attribute address for a specific pixel (look it up), etc.
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Development
  • Uridium on the Speccy: definitive version?Uridium is one of the staples of the C64 shoot-em-up canon. I first played it on the Speccy twenty years ago, but became much more familiar with it …

    ... the game to have single pixel smooth scrolling over less smooth ... no.

    Regarding smooth pixel scrolling, yes it can make ... Spectrum is one example (3 pixel scrolls), R-Type another (1 ... extra colours have to either add something important to the game ...
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Games
  • Uridium on the Speccy: definitive version?Uridium is one of the staples of the C64 shoot-em-up canon. I first played it on the Speccy twenty years ago, but became much more familiar with it …

    ... Alcoholics Anonymous;166912]Regarding smooth pixel scrolling, yes it can ... good scrolling experience' from non-pixel scrolling, but what I'm ... the game rubbish, but pixel scrolling would surely make it ... extra colours have to either add something important to the ...
    Fizza Fizza January 2007 Games
  • TommyGun 0.9.x updates** Should be available via the utilities page soon! Please be patient :-) ** I'll be posting all future updates in this thread, instead of creating …

    ... After that I could possibly add Dragon support, but I ... would really like to add Memotech 500/512 before ... bits per pixel 320x200, 2 bits/pixel 640x200 and ... resolution and 16 bits/pixel but had a 4096 ... Common traits... bits / pixel and resolution (aspect ratio).
    JamesD JamesD February 2007 Development
  • TommyGun 0.9.x updates** Should be available via the utilities page soon! Please be patient :-) ** I'll be posting all future updates in this thread, instead of creating …

    ... could investigate the 4:3 pixel ratio effects on the rotate ... palette.
    Some palettes use pixel maps and attributes (eg. speccy ... colour is encoded in the pixel value.
    Remember TommyGun is ... .
    And maybe I will add an export feature (File|Export ...
    Kiwi Kiwi February 2007 Development
  • TommyGun 0.9.x updates** Should be available via the utilities page soon! Please be patient :-) ** I'll be posting all future updates in this thread, instead of creating …

    ... /> [quote]
    Some palettes use pixel maps and attributes (eg. speccy ... colour is encoded in the pixel value.
    Remember TommyGun is ... .
    And maybe I will add an export feature (File|Export ...
    Alcoholics Anonymous Alcoholics Anonymous February 2007 Development
  • Good 128k games?As I only got my +2 in the twilight years of the spectrum and then discovered cider and Doctor and the Crippens (punk band), I never really had many …

    ... of the machine one single pixel rows and close together "could" give ...
    The Starglider The Starglider March 2007 Games
  • TommyGun 0.9.x updates** Should be available via the utilities page soon! Please be patient :-) ** I'll be posting all future updates in this thread, instead of creating …

    ... />
    [code]
    [ ] OUTPUT PIXEL DATA (yes/no checkbox)
    pixel data (or vice versa ... ).

    The pixel data is in column major ... that is, eg, 2 rows x 2 cols in size ... actually drawing it as 2 rows x 3 cols and ...
    Alcoholics Anonymous Alcoholics Anonymous March 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…

    ... this, when inceasing the y pixel position as in your subroutine ...
    ex de,hl
    add hl,bc
    ex de ... bc,0; ex de,hl; add hl,bc; ex de,hl ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • 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?

    ... />
    LD DE, 32
    ADD HL, DE

    which ... a line where the next pixel is the next screen row ... work out where the next pixel shoudl be in the frame ...
    Winston Winston April 2007 Development
  • 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?

    ... />
    Here is the same pixel / attr combination seen in the ... /> [code]
    Original Spectrum
    Pixel: 010B BSSS LLLC CCCC
    Pixel: 010B BLLL SSSC CCCC
    add 32 when moving down scan ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • 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?

    ... slower than an 11 cycle add but I've found I ... as fast as possible -- this add would mean extra pushes/pops ... layout for both its 6k pixel area and the 6k attr ...
    obo obo May 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 ... address of background graphics
    ADD HL,BC ; BC=4; width ...
    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…

    ... get 224 cycles per pixel row (this includes left ... see tearing along one pixel row as the back ... variable amounts to get smooth pixel movement) in that time. ... word but more like pixel-placed UDGs. What I ... to draw complete(ish) pixel rows in top to bottom order ...
    Alcoholics Anonymous Alcoholics Anonymous May 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…

    ... add a constant to the buffer address to move down a pixel ... add 30 to the buffer address to move down a pixel ... when moving down one pixel row. z88dk does ... fat character in each vertical pixel row.

    pixel row.

    Alcoholics Anonymous Alcoholics Anonymous June 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 one more twist to add to this subroutine. Each of ... , now is the time to add a "#include " header to the ... compute the screen address from pixel coordinates, screen address from column ... is an address in the pixel area of the spectrum's ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • First steps in Z80 machine codeI never got into machine code much back when I had a speccy, as I didn't have any development tools at the time. The only machine code I'd previousl…

    ... a 8x8 character at any pixel row on the screen. Made ... at y-coord specified in pixel rows and at x-coord specified ...
    Arjun Arjun 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 double printed message 1 pixel at a time in the ...
    ld de,33
    add hl,de
    pop de ... />
    char *s1 = "Smooth 1 pixel continual scrolling message printed double ...
    wokani wokani 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 double printed message 1 pixel at a time in the ... ]
    ld hl,3
    add hl,sp ;; hl = address of ... asm to move down a pixel line -- you can use the ... = 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…

    ... calculating the screenaddres to a pixel.
    When I lower 1 ... pixel I test if it's ... .

    In a 8 pixel line it is calculated twice ...
    ld l,c
    add a,(hl) ; 0*8, 1 ...
    Dr BEEP Dr BEEP 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…

    ... = " ";
    char *s1 = "Smooth 1 pixel continual scrolling message printed double ... /> .loop
    pop hl
    add hl,de
    push hl ...
    wokani wokani 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…

    ... the Y address of each pixel row.

    ... 256 ; 2 / 7
    ADD A,(HL) ; 1 / 7< ... = ttYYY000 2 / 7
    ADD A,A ; A = tYYY0000 1 ... 224 ; 2 / 7
    ADD A,B ; 1 / 4
    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…

    ... of any arbitrary number of rows/columns.

    If the ... , c = column, D = number of rows, E = number of columns:
    ADD C
    LD L,C

    ; Do D character rows ... ,E
    PUSH DE ; Remember rows/columns
    LD D,H ...
    hldswrth hldswrth 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…

    ...
    POP DE ; Restore rows/columns
    POP BC ; Restore ... /> LD A,L
    ADD A,32
    LD L ... /> LD BC,2048
    ADD HL,BC

    ...
    hldswrth hldswrth 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…

    ... next char boundary
    add hl,de ;by adding 32 ... byte per address
    add a, l
    ld ... inc h ;increment h to pixel line aligned address
    ... addx ld a,l
    add a, c ;get x ...
    Arjun Arjun 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…

    ... all these little savings that add up in a large ... two frames. Split the buffer pixel shift in half, doing ... the screen scrolled left one pixel, the task is to ... expression to figure out what pixel to plot on the right ... are any takers I'll add this to the project, ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
<1…9101112131415…34>

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