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<1234567…34>
  • 28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…

    ... think only Joefish read it! Gasman independently came up with essentially ... exchange registers would give you even more options.

    I ... />
    LABEL ORG 0FDFDH
    JP HIRES
    ORG LABEL
    AMW AMW April 2012 Development
  • Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…

    ... 2004-04-24 21:43, gasman wrote:
    Sound quality isn ... and rets for volume with "jp"s to save another 7 ... for each channel).

    Even with these changes, we're ...
    Alcoholics Anonymous Alcoholics Anonymous April 2004 Sinclair Miscellaneous
  • Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…

    ... the classic one (posted by gasman) by a little bit when ... a routine. And it becomes even faster using jp instead of jr.
    Metalbrain Metalbrain November 2008 Development
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    [QUOTE=gasman;543525]Storing the position as ... in a byte variable or even a register and easily calculate ... />
    call 6683

    jp GameLoop ; loop to beginning of ...
    ooze48k ooze48k July 2011 Development
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    [QUOTE=gasman;634880]But then the RST ... ]I guess JP 1 will avoid that, but even so, there's ...
    chev chev June 2012 Announcements
  • Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…

    ... not incur penalty. So even using a modern front end ... , match ; found character
    jp po, notfound ; n exceeded
    dec e
    jp nz, loop ; nope, still more ... was utterly, immensely impressed by Gasman's Outline 2010 demo "DivIDEo ...
    Alcoholics Anonymous Alcoholics Anonymous June 2013 Development
  • AY RIDERS - new project for SpeccyJust in case You don't know 'bout it yet. here is the text: Do You like chiptunes? Do You like Speccy? Do You like AY????????? So take a look HE…

    ... of our site. You can even convert the
    files into ... &#150; CZECH

    GASMAN
    NATIONALITY &#150; ENGLISH ...
    Yerz Yerz December 2002 Sinclair Miscellaneous
  • AY RIDERS - new project for SpeccyJust in case You don't know 'bout it yet. here is the text: Do You like chiptunes? Do You like Speccy? Do You like AY????????? So take a look H…

    ... of our site. You can even convert the
    files into ...
    NATIONALITY - CZECH

    GASMAN
    NATIONALITY - ENGLISH

    Yerz Yerz December 2002 Announcements
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... P/V flag is reset, even if interrupts were enabled beforehand ... where you could put a JP to your 'real' interrupt routine ... edge-triggered, not level-triggered: even if the /NMI pin is ...
    Philip Kendall Philip Kendall July 2004 Development
  • DEC BC/LD A,B/OR C/JP NZ,loopyesterday i saw nice trick:[code] dec bc ld a, b or c jp nz, loop can be replaced (bc starts >255, short jump) by: dec bc inc b djnz loop [/code] …

    yesterday i saw nice trick:[code]

    dec bc
    ld a, b
    or c
    jp nz, loop

    can be replaced (bc starts >255, short jump) by:

    dec bc
    inc b
    djnz loop
    [/code]
    ..nice
    Fikee Fikee February 2005 Development
  • Japanese mobile cell phone Emulator?Hi I live in Japan and thus have a Japanese mobile cell phone it's a Vodafone 904T by Toshiba: [URL="http://www.vodafone.jp/english/products/model_3G…

    ... :
    [URL="http://www.vodafone.jp/english/products/model_3G/v904t/index ... .html"]http://www.vodafone.jp/english/products/model_3G/v904t/index ... but the file didn't even show up on my mobile ...
    edkeyte edkeyte September 2006 Emulators
  • History Channel documentary doesn't even mention the SpectrumI recently saw this documentary about the history of computers and it didn't even mention the Spectrum. Was it really irrelevant when it comes down t…

    ... computers and it didn't even mention the Spectrum. Was it ...
    torstum torstum October 2006 Sinclair Miscellaneous
  • Happy Burfday Gasman!!!Happy Burfday Gasman! May you have many more gassy Guddens :D Happy Burfday! Drink Beer! Have a Gudden!

    Happy Burfday Gasman!

    May you have many more gassy Guddens :D

    Happy Burfday!

    Drink Beer!

    Have a Gudden!
    dm_boozefreek dm_boozefreek July 2007 Chit chat
  • games you persevered with, even tho' they were cr*pI remember spending ages on 'Metal Drone' ([url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003143)[/url], and to be honest it's not a great g…

    I remember spending ages on 'Metal Drone' ([url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003143)[/url],
    and to be honest it's not a great game at all... I don't even know why I tried so hard with it...
    def chris def chris February 2008 Games
  • Japanese-only or lesser-known games you playedI've noticed by their comments there are a few people on WOS (hi Vertigo, dm_boozefreek etc.) who have played titles which were either never released…

    ... the JP carts would fit in?). I don't even remember ... many of which were not even released here in Europe like ... was years before this would even get a western release ... here but I can't even remember them all:
    ... around those 3 consoles. Even though I got a PS1 ...
    XTM of TMG XTM of TMG March 2008 Chit chat
  • Classical music on the Speccy?While I was watching CVP409 videos on YT, I found a few movie scores and it made me start yet another topic about the AY chip. I know the beeper and…

    ... , with a few exceptions by Gasman. While this is really nice ... . :)

    Maybe it could even become a compo. Best AY ...
    zxbruno zxbruno May 2008 Sinclair Miscellaneous
  • Games you own but haven't even started yetGo on then. What do you own but you haven't even started, even though the intention is there, but the time never seems to come around or you already…

    ... own but you haven't even started, even though the intention is ...
    Vertigo Vertigo June 2008 Games
  • Bresenhams circle algorithmI post here my final circle code to replace, if you want, the one in the ROM. It only uses integer math and runs very fast and is very compact. It is…

    ... very compact.
    It is even more precise than the one ... é x



    jp Loop ;end While

    rtunes rtunes September 2008 Development
  • Random access, file sizes and more.A few days ago Aowen mentioned that random access to saved data is not a problem. Here are my thoughts, doubts and suggestions regarding this subject…

    ... to load and save data even if it doesn't fit ... we wanted to listen to Gasman doing something at his birthday ... the digitized audio file of Gasman's birthday party. :)

    even a small BASIC program) and ...
    zxbruno zxbruno November 2008 Development
  • are Doujin Shmups on zx-spectrum technically possible?Here goes a challenge for actual zx-spectrum game coders - are those impressive doujin shmups we were seeing available onilne, technically possible o…

    ... ]http://www.asahi-net.or.jp/~cs8k-cyu/index_e.html[/url ... with that shower of bullets, even if only handling the 768 ...
    nitrofurano nitrofurano April 2009 Development
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... came up with from [B]gasman[/B]'s suggestions. It' ... ;04t => 022t
    jp nz,interrupt_delay_loop ;10t => 032t ... still works in BASIC):
    jp 56

    ; ... interrupt routine:
    sample_jump
    jp interrupt_main


    ...
    joefish joefish May 2009 Development
  • Jumping to BASIC after importing 23296,1703Sorry for the confusing title. :-D Now that I've learned how to stop a game from starting after loading (in Fuse and Specemu), I have a few more que…

    ... how to use LD, LDIR, JP, RET, but not much more ... to the screen memory or even store it on a REM ... emulation isn't always available (even if it's enabled in ...
    zxbruno zxbruno May 2009 Sinclair Miscellaneous
  • Goldfinch - an open software stack for mass storageYep, another pet project of mine to compete with all the others I've started. But hey, if I didn't get distracted by things like this I'd just get di…

    ... />
    [url]http://github.com/gasman/goldfinch/tree/master[/url]
    even I've thought of yet ...
    gasman gasman May 2009 Announcements
  • Problem loading Warajevo tapes even if they are converted to TZXDear readers, Yesterday I experimented with some of my older Warajevo tapes (which are known as being completely different from Lunter tapes) that c…

    ... TZX files. Worked well.
    Even the direct recording blocks are ... emulators won't load them, even if I disabled edge protections ... the original Warajevo tapes, but even in normal 48k emulation I ...
    clausjahn clausjahn June 2009 Emulators
  • Happy Birthday GasmanHappy birthday Gasman...

    Happy birthday Gasman...
    rich_chandler rich_chandler July 2009 Chit chat
  • Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…

    ... a hook code (or an even easier way) to load a ... of concept
    ;
    ; mailto: jp@drumfu.com
    ;
    org ... /> call unpack ; unpack game
    jp 24832 ; and start
    ret ...
    jp jp 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…

    ... of it for future developers, even if the overall project hits ... [url=http://github.com/gasman/goldfinch/tree/master]over on ... ftp://ftp.untergrund.net/users/gasman/zx/goldfinch/screenbrowser.tap[/url ... read/write code compiled in (even though this program doesn't ...
    gasman gasman September 2009 Development
  • AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…

    ... 'Breath of Air' uploaded by Gasman to YouTube. The AY chip ... combination of digital samples playback. Even though the cpu would have ...
    zxbruno zxbruno October 2009 Hardware
  • 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…

    ... GAMEOVER change line 55 to 'jp PRINCIPALLOOP'.
    Assemble, save, and ... by one. If it is even, increase by one.
    (To ... last bit for odd and even we use 'and 1' which ...
    jr nz, wait
    jp principalloop
    gameover
    pop ...
    bigjon bigjon November 2009 Development
  • Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…

    ... it mustn't be because even the minimal code gives a ... ,L
    CP 0
    JP NZ,LOOP

    EXX ...
    RoseCotton RoseCotton November 2009 Development
<1234567…34>

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