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Search Again :: Adv Search 1000 results in 0.076s
<1234567…34>
  • 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…

    ... /> ld a,(shipx) ;calcuate character column from shipy value
    character lines in middle third of the screen. ... adding 32 to l will move an additional character line down ... third of the screen (now one character line down)? Regardless of whether ...
    48K 48K 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…

    ... of the character lines in middle third of the screen. adding ... 32 to l will move an additional character line down ... ) third of the screen (now one character line down)? Regardless of whether adding ... only safe on valid screen addresses from lines 0 ...
    Kiwi Kiwi May 2006 Development
  • Blake's 7I've got an idea for a Blake's 7 video game for the 128K Spectrum (Only problem is I can't code in neither machine code or Sinclair BASIC, so I will …

    ... more appropriate for the loading screen - the original logo (Series 1 ... have a split screen , with one character on the top and one on the ...
    Dwayne Dibley Dwayne Dibley May 2009 New game ideas
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ... towards scrolling a text screen vertically one character without burdening the CPU ... the screen horizontally by two bytes at a time (one character in ... it works by allocating one 16K bank to storing the ... that bank at which the screen begins, with it wrapping ...
    AndyC AndyC September 2010 Hardware
  • 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…

    ... :
    inc hl ; next character
    jr tokenizer_4 ; repeat ... br /> tokenizer_16:
    dec hl ; down one character
    bit 7, (hl) ; final ... /> rst get_char ; get current character
    cp ctrl_enter ; carriage ...
    chev chev October 2013 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…

    ... the available routines to scroll the entire screen in any direction, but ... able to find one that would allow me to scroll a specified ... column (1 x 22 characters) one character to ...
    zxbruno zxbruno 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…

    ... 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.
    ... /> To scroll the road down the screen we copy the screen attribute bytes ...
    bigjon bigjon November 2009 Development
  • Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…

    ... Copyright screen, but each character position has a vertical line going down it ... service manual, replaced IC1 with one from a broken Issue 2 ...
    Muzer Muzer June 2011 Hardware
  • 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…

    ... etc...). It scans the screen memory by character square so -> attribute ... /> _ulzfa060:
    inc a ; 4t - down one pixel row, stay in char ... just return
    ;;
    ;; move down one row
    ld a,e ...
    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 ... of the screen memory where we started drawing our 8x8 character).

    ; Scroll left

    ; much more ... ; we've still got more screen to scroll
    ret

    Anonymous Anonymous June 2002 Games
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    ... can read them in a SCREEN$. [Dr. BEEP]
    * Alternatively ... always points to the right character set when PRINTing, LISTing, ... 130 tend to noticeably slow down the keyboard response (since ...
    Specifies cursor. Values zero, one, two or four specify the ...
    na_th_an na_th_an April 2005 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…

    ... gfx into screen
    inc h ;move one pixel down
    ... it just printing one character somewhere on screen. you want to ... /> [/code]
    note one thing:
    when we decide ... scroll "null" up slowly the "9" will flash on the screen ...
    Fikee Fikee November 2006 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…

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

    ... messages to scroll across the bottom of the screen. The ... next line). 2- the scroll routine will be dealing with ... one character at a time as the message scrolls across the screen ...
    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…

    ... to a maximum value) and one down timer (as in a timer ... don't want the scroll to flicker on screen. When the 50Hz ... its characters and represents each character by a 24-byte "struct ... at address "g_textBuffer". The current character within that string being drawn ...
    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…

    ... because this actually slows things down. So with 7 push/pops ... another pixel row but one character up. The scroll will work properly it ... the screen to the bottom. To go faster you have to scroll ... will see somewhere up the screen. This happens when the TV ...
    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…

    ... explain.
    c64 can scroll screen in a simple way ... and slows the game down, also the MYTH dragon ... surelu moves pieces on character basis rather than on ...
    [QUOTE]Virtually every one agrees that the Z80 in ... can find tasks where one or second is clear ...
    Fikee Fikee November 2008 Sinclair Miscellaneous
  • 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 ... /> ; enter: HL = valid screen address
    ; exit : HL = moves one character down
    ; used ...
    0sAND1s 0sAND1s February 2010 Development
  • Most colourful games?I just played [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0001563]Earth Shaker[/url] and am fairly dazzled by the overload use of colour (t…

    ... at 45?, so things scroll one character left and one down. [I]Knight Lore[/I ... www.worldofspectrum.org/showscreen.cgi?screen=screens/in-game/s/ ... ] can get away with character movement because the sprites are ... Although it's the wide screen ratio that's wrong for ...
    joefish joefish July 2011 Games
  • 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?< ... the result in the current character square needs to incorporate ... fixing the screen address to write to by moving down one pixel and ... is repeated depending on the character width of the sprite ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 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 ... a black screen with two white squares bouncing up & down in ... writing a routine to selectively scroll a character column of a specified ...
    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 ... a black screen with two white squares bouncing up & down in ... writing a routine to selectively scroll a character column of a specified ...
    zxbruno zxbruno 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.
    ... /> To scroll the road down the screen we copy the screen attribute bytes ...
    buzzy buzzy September 2012 Development
  • The making of R-Type on the speccy book, free downloadBob Pape, the guy who wrote R-Type on the speccy has made his book, "IT'S BEHIND YOU: the making of a computer game", available for free download: [u…

    ... the screen (40 characters across, 25 down). If you redefine one of ... be done by having different character sets in memory - that ... pointer from one character set to another (and updating the screen, I ... 'd could get the screen the scroll by only updating about ...
    TMR TMR September 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…

    ... po_scr_3 ; scroll the screen
    ... c ; down one line
    character
    jr po_able ...
    chev chev November 2013 Development
  • Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…

    ... spent quite a while discussing screen modes, palettes etc. Between ... hardware scroll them (whilst hiding one character of display at the screen edges ... the PAPER pixels in a character square to be transparent. ... O, and it always boils down to these simple facts: ...
    JeffB JeffB July 2014 Hardware
  • 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…

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

    ld ... hl ; the first address plus one of the
    ; extra ...
    ; -------------------------------
    ; WRITE A CHARACTER TO THE SCREEN
    ; -------------------------------
    ;
    ; ...
    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…

    ... that moves an 8x8 character across the screen one pixel at the ... put graphic into screen
    inc h ;down one row on screen address
    screen memory
    dec hl ;move back one character to the ... B]
    inc h ;move down one line
    dec e ; ...
    Rickard Rickard May 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…

    ... 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
  • One's speccy is unwell, can anybody help?Hi chaps! This would be my first post here, so hello to all :smile: I've got a 128+ heatsink speccy that seems to have a display issue whereby after…

    ... one character block wide seem to randomly appear then disappear across the screen ... or displays more garbage on screen and crashes altogether :-?

    Yeti Yeti June 2008 Hardware
  • Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…

    ... /> ; _PLOT2CHR - plot double sized character on screen
    ; input - h-ypos ... correct place in ROM for character graphic
    ; **************************************************
    exx ; ... no carry then not moved one screen quadrant down, reset h
    ...
    TomD TomD April 2011 Development
<1234567…34>

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