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Search Again :: Adv Search 1000 results in 0.066s
<1234567…34>
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... show comments)

    [code];scroll down 1 pixel at a time ... ,22527 ;point to bottom right screen
    ld de,22271 ;point ... /> nextbyte
    dec de ;move one byte back along the line ... 're repeating the pixel scroll
    dec b ;one scroll less to go ...
    bigjon bigjon February 2008 Development
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... version of this tutorial, one which is easier to read ... chapter, starting with the last one.
    The assembly language ... changing the paper colour of one character square to blue.< ... br /> To scroll the road down the screen we copy the screen attribute bytes ...
    bigjon bigjon November 2009 Development
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... /> //
    // *****************************************************************************
    // zxsclzf ZX Spectrum Screen Compressor
    // by Tom Dalby ... /> _ulzfa060:
    inc a ; 4t - down one pixel row, stay in char ...
    TomD TomD April 2017 Development
  • ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…

    ... you'd add to move down one pixel)
    ; to say, HL ... the next line down but to the next
    ; screen segement (we ... ; we've still got more screen to scroll
    ret

    screen
    ret
    ; Scroll left colour
    Anonymous Anonymous June 2002 Games
  • 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…

    ... // adjusts destination address to move down one scan line

    ... screen and it requires double width text messages to scroll ... across the bottom of the screen. The approach ... can render to the screen one complete pixel row by ...
    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…

    ... ); // copy buffer to screen
    temp += 256; // next screen address down one pixel
    scroll, scroll it
    asm("call\t56 ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Spectrum games coming to the WiiJust received this [url]http://www.n-europe.com/news.php?nid=11037[/url] earlier this morning from my brother, who knows of my love of old compute…

    ... Ctrl. Left stick as scroll up down on web pages and left ... to small on a TV screen. Maybe a high-definition TV ... any other system with even one user) "dead", except perhaps commercially ... console games.

    And one definate advantage of console gaming ...
    ewgf ewgf September 2007 Games
  • 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…

    ... to a maximum value) and one down timer (as in a timer ... for two reasons. One is we want the scroll to occur at ... don't want the scroll to flicker on screen. When the 50Hz ... appear anywhere on screen by moving it off screen using one of the ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... foray - perhaps a fixed-screen game? as scrolling games ... from trying to write one.[/quote]Thanks for the ... well.
    [CODE];scroll down 1 pixel at a time ... br /> dec de ;move one byte back along the line ... the pixel scroll
    dec b ;one scroll less to ...
    bigjon bigjon February 2008 Development
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... time, not the screen address one double byte at a ... right order on the screen starting one pixel line higher? ... 32) because pushing moves down in memory. So we ... this doesn't even scroll the screen in pixel row ... to hard code the scroll in a single monolithic ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 Development
  • what were the things the Speccy architecture was good for?I don't know a hell of a lot about all the different computers hardware and I wanted to know if the way the Spectrum was built lent itself to certain…

    ... to explain.
    c64 can scroll screen in a simple way but ... hell and slows the game down, also the MYTH dragon is ... .

    [QUOTE]Virtually every one agrees that the Z80 in ... you can find tasks where one or second is clear winner ...
    Fikee Fikee November 2008 Sinclair Miscellaneous
  • Back to Skool disassemblyAs mentioned in [url="http://www.worldofspectrum.org/forums/showthread.php?t=22841"]this thread[/url], I've been working on a disassembly of Back to …

    ... , then move right. The screen will scroll at each step Eric makes ... (update SRB for ERIC and scroll screen if necessary).

    [quote ... .[/quote]
    I remember that one now too: it can happen ... , telling the kids to sit down (or waiting to do so ...
    SkoolKid SkoolKid July 2009 Development
  • Character scrollingOk, first I'd like to say that I'm not looking for a complete routine (but that might help) because I am hoping to write it myself and learn a bit mo…

    ... scroll routine I wrote for scrolling the entire screen up or down one by one ... screen cell rows.
    ;One table has addresses in increasing order, for scroll down ... : HL = valid screen address
    ; exit : HL = moves one character down
    ; used ...
    0sAND1s 0sAND1s February 2010 Development
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... are you trying to scroll? The screen or sprite graphics data?
    ; write A byte to screen somehow maybe like this
    ; exx ; hl = current screen address
    ; or (hl)
    screen address to write to by moving down one pixel and ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • Mr Do!, and paging ajmoss and othersIn threads like [url]http://www.worldofspectrum.org/forums/showthread.php?p=466099[/url] the possibility of Mr Do! has been discussed, but nothing…

    ... d need a Speccy screen 26 characters high to ... hurt to just remove one row somewhere in the ... scroll slightly when the player's sprite goes up or down ... , so that there are two screen states, one shows ... the twenty six). Flip screen rather than scrolling, of ...
    ewgf ewgf April 2012 Games
  • Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…

    ... you said you wanted to scroll one column of characters to the ... that you wanted to scroll all but one column of attributes to ... a black screen with two white squares bouncing up & down in ... history tracking left across the screen, showing the last 32 positions ...
    Battle Bunny Battle Bunny May 2012 Development
  • Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…

    ... you said you wanted to scroll one column of characters to the ... that you wanted to scroll all but one column of attributes to ... a black screen with two white squares bouncing up & down in ... history tracking left across the screen, showing the last 32 positions ...
    zxbruno zxbruno May 2012 Development
  • Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …

    ... the screen - easy.

    Now, if you copy from one line ... lower in your buffer to the top of the screen ... memory. So now we use one of those tricks I described ... -around.

    To scroll the screen down, you just reverse the process ...
    joefish joefish May 2012 Development
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... chapter, starting with the last one.
    The assembly language ... /> Some instruction bytes need one or two bytes of data ... changing the paper colour of one character square to blue.< ... br /> To scroll the road down the screen we copy the screen attribute bytes ...
    buzzy buzzy September 2012 Development
  • Mini scroll routineI'm looking for a routine that scrolls a small section of the screen downwards and replaces it with nothing, 2 x 2 charcter blocks to be precise, to …

    ... it looks the screen is being pulled down with an empty ... it
    call scroll_one_line ;move down one line of the 192 in ... counter
    djnz scrlp ;repeat scroll loop 'B' times
    ret ... something similar but uses a screen address table and manipulates the ...
    R-Tape R-Tape October 2012 Development
  • Works in Fuse & SpecEmu, not ZXSpinI decided that I wanted to change the scroll routine which I was using for compiling the Trailblazer maps, as I'd just copied it out of Andrew Hewson…

    ... I didn't like that scroll routine one bit. Here's a ... ]
    CHARSCROLL: ;wrapscroll whole screen by one PRINT row
    di

    ;scroll down corresponding pixrows from previous 23 ...
    Battle Bunny Battle Bunny June 2013 Emulators
  • The game I have just reviewed on Spectrum 2.0 is...Future Looter [url]http://www.spectrum20.org/reviews/3097[/url] After Alessandro's recent thread about cynical WoS scoring I came to realise that a…

    ... is going up rather than down, one of the few places where ... I think, pioneered the bad scroll that you like. It also ... action puzzler which uses the scroll to add anxiety to the ... worry of running off the screen in Boulderdash to try to ... last few seconds count down.
    Jumping Stack Jumping Stack August 2013 Games
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... ROM1
    call po_scr_3 ; scroll the screen
    .endif
    ... so
    dec c ; down one line
    ld a, 24 ...
    chev chev November 2013 Development
  • A new emulator is in townHello, I'd like to announce a new ZX Emulator, it's Spectacol (https://github.com/bog-dan-ro/spectacol) a free (GPLv3+) emulator which currently t…

    ... startup, the on screen android menu buttons scrolled down, but as soon ... dpad or analogue stick, both scroll so fast with a single ... I don't mind that one of the currently assigned functions ... etc from touch screen control.

    One more question: Is ...
    Antiriad2097 Antiriad2097 March 2016 Emulators
  • A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…

    ... ),a

    inc h ;down one line

    ld a ... A with high byte of screen address
    sub 8 ;subtract ... /> ptr_shift equ $-1

    ;scroll left H+L
    add ... A with high byte of screen address
    sub 8 ; ...
    Jerri Jerri March 2017 Development
  • A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…

    ... /> ptr_shift equ $-1

    ;scroll left H+L
    add ... the left
    inc h ;down one line

    ld a ... A with high byte of screen address
    sub 8 ;subtract ...
    Jerri Jerri March 2017 Development
  • Help required to calculate screen addressesDoes anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of …

    Does anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of this.
    Mr Millside Mr Millside November 2004 Development
  • Convert Screen to TAPHow do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one …

    How do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one for memory and then copy them all together into one tap file)

    Many thanks
    robpearmain robpearmain December 2005 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... /> dec hl ; move hl down one address

    ld ... /> ; WRITE A CHARACTER TO THE SCREEN
    ; -------------------------------
    ;
    ... inc d ; point to next screen location
    inc hl ; ... inc d ; point to next screen location
    inc hl ...
    chev chev January 2007 Development
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ... an 8x8 character across the screen one pixel at the time. I ... ;put graphic into screen
    inc h ;down one row on screen address
    inc h ;move down one line
    dec e ;decrease ...
    inc hl ;move one screen byte to the right
    ...
    Rickard Rickard May 2007 Development
<1234567…34>

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