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<1…17181920212223…34>
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... it was, with a big delay loop, for the +2 et al ...
    frobush frobush August 2009 Development
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... it was, with a big delay loop, for the +2 et al ...
    Madonna Mk 2 Madonna Mk 2 August 2009 Development
  • DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…

    ... initial entry point), the do_callbas routine in trapdispatch.asm which calls ... the ZX ROM routine, do_rst8 also in trapdispatch.asm ... ]
    ld hl, stringaddr
    .loop
    ld a, (hl)
    inc hl
    jr .loop
    [/code]
    Winston Winston August 2009 Development
  • The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…

    ... install after reset. Add wait loop from adress 1 on divide ... 're absolutely right! Adding a delay loop has fixed it. What the ...
    gasman gasman September 2009 Development
  • The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…

    ... absolutely right! Adding a delay loop has fixed it. What ... from adress 0 wait loop and continue after last ...
    This is wait loop from original ZX128 rom, you ... br /> #0004 DEC BC ;Delay about 0.2s
    # ... br /> ABC DEC BC ;Delay
    IN A,(#A3)
    velesoft velesoft September 2009 Development
  • The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…

    ... ; C = data register, 0x00 = loop x256
    inir ; inir twice ... ; C = data register, 0x00 = loop x256
    inir ; read first ... sector reading very unstable and routine must return error. Mimilar ... ; C = data register, 0x00 = loop x256
    otir ; write first ...
    velesoft velesoft September 2009 Development
  • I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…

    ... you do it after a delay instead of on the raster ... of a screen-copying-scrolling routine. It wasn't at 50Hz ...
    joefish joefish September 2009 Chit chat
  • I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…

    ... you do it after a delay instead of on the raster ... of a screen-copying-scrolling routine. It wasn't at 50Hz ...
    Matt_B Matt_B September 2009 Chit chat
  • The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…

    ... ). Then have a big long loop that just waits for long ... three things can happen: the loop can complete without any interrupts ... could complete jumping to a routine in my new table. This ...
    Winston Winston October 2009 Development
  • Test ROM Cartridge For SaleI'm selling another load of gear including a Sinclair Research Test ROM Cartridge. [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4000772…

    ... a routine into the 16K video RAM that executes a tight loop ...
    murtceps murtceps October 2009 Sales
  • 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…

    ... by calling an interrupt service routine. Afterward it will resume where ... to run BASIC's interrupt routine so by default that is ... the middle of the principal loop? Does the port number in ...
    bigjon bigjon November 2009 Development
  • Framerate of arcade gamesThe Golden Age of video games coincided with the birth of 8-bit home computing; this is why every computer of that era has a slew of really bad Pacma…

    ... command. This normally involves a delay loop: loading BC with a pre ... to complete the entire game loop in just 20ms, you can ...
    ajmoss ajmoss November 2009 Games
  • Framerate of arcade gamesThe Golden Age of video games coincided with the birth of 8-bit home computing; this is why every computer of that era has a slew of really bad Pacma…

    ... command. This normally involves a delay loop: loading BC with a pre ... to complete the entire game loop in just 20ms, you can ...
    Fikee Fikee November 2009 Games
  • Framerate of arcade gamesThe Golden Age of video games coincided with the birth of 8-bit home computing; this is why every computer of that era has a slew of really bad Pacma…

    ... command. This normally involves a delay loop: loading BC with a pre ... to complete the entire game loop in just 20ms, you can ...
    jonathan jonathan November 2009 Games
  • Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …

    ... /> RET

    Invoking the routine by "PRINT USER begin" resulted ... to run the MASK-INT routine.
    -------------------------------------------------------------------
    For testing ... result
    LOOP: CALL 56 ;17 the MASK-INT routine
    DI ...
    roko roko November 2009 Development
  • Jonathan Cauldwell writes.I also found this in me old archives, which was actually written by Jonathan Cauldwell. Again, typos and editorial tags included for authenticity ;-)…

    ... with a sprite routine and a simple control loop to manipulate the ... screen. This first control loop rarely takes long to write ... tasks. For example, a sprite routine works by moving a line ... the loop until all lines are complete. Instead of programming a routine ...
    Shaun.Bebbington Shaun.Bebbington December 2009 Sinclair Miscellaneous
  • What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…

    ... [/B] outside of the main loop, and pre-load it with ... in a loop.

    The WriteMsg in the second routine is ...
    Geoff Geoff January 2010 Development
  • Games that could've been goodI've just been playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0009311]Blade Warrior[/url] (it's been deniencededed since I got hold of…

    ... were compressed etc. hence the delay for decompress etc :)[/QUOTE]I ... -quick - a custom quadrilateral-fill routine could be quicker - but it ...
    joefish joefish January 2010 Games
  • Why did Ultimate games load like this?What I remember about the early Ultimate games was the unusual way they loaded. You'd get the BASIC bootstrap loader, then a SCREEN$, then a main bl…

    ... the CODE at 23424. The routine at 23424 does a LDIR ... gets stuck in an infinite loop when it comes across a ...
    Jimmy Jimmy February 2010 Games
  • Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …

    ... -timing of the main game loop allowing the Smiler sprite to ... iteration of the main game loop.
    It could be sped ... there's now a short delay in there to fix the ...
    Digital Prawn Digital Prawn February 2010 Games
  • 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…

    ... scrolling, you might find this routine helpful (it produces 7 roll ...
    ld b, 0 ; inner loop, 256 iterations
    ld c ...
    Paradigm Shifter Paradigm Shifter February 2010 Development
  • shifting spriteshi. have anyone experience with shifting sprites by table ? some neat tricks ? i don't want to see complete code (really don't want, it trashes thr…

    ... using shift instructions is a loop to count the shifts. So ... 8 copies of your sprite routine, each one doing a different ... written a pixel-positioning sprite routine for the Speccy myself, only ...
    joefish joefish February 2010 Development
  • Platform Game Designer 2Right, with Telly Heroes out of the way, I've decided to have a second attempt at this. I've ditched the old PGD2 source, and started again with the…

    ... preshifting sprites or having a routine that handles it on the ... the frame rate, although the delay in AGD does do a ...
    BiNMaN BiNMaN February 2010 Development
  • How do you start?ok just humour me, ive always wanted to code but never got round to it apart from the real basics ie:- 10 print "hello" 20 print 30 goto 10 i coul…

    ... a routine to print a centre-aligned string, and then a loop ...
    szeliga szeliga February 2010 Development
  • Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…

    ... .
    Just set up a loop to print each character in ... space).
    There is a routine to print a string in ...
    Geoff Geoff March 2010 Development
  • I woke up this morning...Well, in the middle of the night, and recorded this. I've just discovered Native Instruments Guitar Rig program. So I can now plug in and play in th…

    ... , with an Arion digital delay in the fx loop. Guitar in right ...
    FrankT FrankT March 2010 Chit chat
  • I woke up this morning...Well, in the middle of the night, and recorded this. I've just discovered Native Instruments Guitar Rig program. So I can now plug in and play in th…

    ... , with an Arion digital delay in the fx loop. Guitar in right ...
    def chris def chris March 2010 Chit chat
  • Castlevania ZXDoes anybody know what happened to the Castlevania ZX project? Yet again another great game that missed the Spectrum but had a port on the C64 [url…

    ... project.
    My project is delay in the time, becose need ... i write and rewrite one routine some times, to make speed ...
    Z80user Z80user March 2010 Development
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
delay 1.7K 2.7K
routine 9.5K 14.8K
loop 4.8K 8.5K

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