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  • Konami Coin Op Hits questionHi I don't quite know where to put this, mods can move my post if they like. I've recently purchased the Konami Coin Op Hits (by Imagine) compilati…

    ... screen loads and the onscreen counter) for Hypersports while the other ...
    Ian Hamilton Ian Hamilton May 2007 MIA/STP/SDP
  • 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…

    ... line
    dec e ;decrease counter for lines
    jr nz ...
    Dr BEEP Dr BEEP May 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…

    Hi. I don't have time to look properly through your code at the moment, but one thing I would say is if you're using B as a counter, replace "DEC B / JR NZ, ..." with "DJNZ ..." - it does the same thing but quicker and with less bytes.
    icabod icabod May 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…

    ... 're using B as a counter, replace "DEC B / JR NZ ... could use it instead of counter E and could use DJNZ ...
    Rickard Rickard May 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…

    ... basic
    ld b,8 ;counter, number of bytes in graphic ...
    Rickard Rickard May 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…

    ... basic
    ld b,8 ;counter, number of bytes in graphic ...
    Dr BEEP Dr BEEP May 2007 Development
  • Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…

    ... big popularity.
    PC (program counter) is 16-bit in practically ...
    piters piters 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…

    ... there is a 24 bits counter for the computer up-time ...
    Rickard Rickard 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…

    ... there is a 24 bits counter for the computer up-time ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... .
    DEC BC Decrease the counter.
    LD A,B If ... the counter is thereby
    OR C ...
    Rickard Rickard 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…

    ... 's merely the way the counter is wired that counts the ... straight into bit 6, the counter is wired up such that ... previous scanline). The ULA memory counter circuit is not very complex ...
    Winston Winston May 2007 Development
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... 555 timer, and a johnson counter to keep track of where ...
    Winston Winston May 2007 Hardware
  • How do debuggers guess mnemonicsLet's suppose I have the following numbers in Spectrum memory: Address Byte 30000 1 30001 2 30002 3 30003 4 If I execute in assembler j…

    ... sense.

    The program-counter (usually) points to a valid ...
    bobs bobs June 2007 Development
  • Game OptimisationBelow is a section of code Im using for movement enermy display and collision detect. What happens is that you move the sight with ,.qa and space do…

    ...
    510 REM z=general counter
    [/QUOTE]

    Now ...
    Toxitalk Toxitalk June 2007 Sinclair Basic
  • Speccy games I bought todayBeen helping out at the Village Day in Ashtead, Surrey today. Was looking around the stalls when I noticed a small box containing 13 Speccy games. So…

    ... life. You went to the counter with the case of the ...
    VincentAC VincentAC June 2007 Games
  • Are you addicted to...The Shaky Game?Occasionally I have a look at [URL="http://www.worldofspectrum.org/playstats.html"]this page[/URL] to see who has been playing what in the online emu…

    ... could either be a duff counter or that people visit this ...
    Scottie_uk Scottie_uk June 2007 Games
  • Are you addicted to...The Shaky Game?Occasionally I have a look at [URL="http://www.worldofspectrum.org/playstats.html"]this page[/URL] to see who has been playing what in the online emu…

    ... could either be a duff counter or that people visit this ...
    andrew_rollings andrew_rollings June 2007 Games
  • Tapir feedback[QUOTE=jpablo]Are you planning to add support for decoding VOCs/WAVs from the tool as well?[/QUOTE] Since Luca offered help, we may together even so…

    ... is different (maybe use a counter and name the files "1 ...
    DEATH DEATH June 2007 Emulators
  • 8-bit or 16-bit registers?I'm playing around with writing a Speccy emulator for mobile Java at the moment. I did a quick and dirty port of Qaop, which does run but at less tha…

    ... and using a 16-bit counter. Is that 8 or 16 ...
    Philip Kendall Philip Kendall June 2007 Emulators
  • 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…

    ... had to fix the byte counter as it wasn't correct ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
  • A Spectrum that fixes itselfWell, the modulator on my 128K toastrack machine fixed itself. It used to drift horribly within the first half hour or so of power up, but now it's a…

    i have a bbc micro that my dad found at a tip once so he took it home and surprisingly it worked but i get really bad character drift i tried to counter balance it wit the fine-tuning but is doesent really help but i am trying to get a spectrum
    speccyperson speccyperson July 2007 Hardware
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    [code]
    1 LET n=191: BORDER 0: PAPER 0: INK 7: CLS : DIM i$(3,9):
    FOR i=1 TO 3: LET i$(i)=" # # # # ": NEXT i: LET p=16: LET b=0: LET a=p:
    LET s=0: FOR y=0 TO 14: LET e=y/2=INT (y/2): FOR x=(1-e)*24 TO e*24 STEP e*2-1:
    PRINT AT 21 ...
    Digital Prawn Digital Prawn 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…

    ... /> _oneLineLoop
    PUSH BC ; Remember counter
    LD B,0
    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…

    ... /> oneLineLoop
    PUSH BC ; Remember counter
    LD B,0
    POP BC ; Restore counter

    INC H
    hldswrth hldswrth July 2007 Development
  • Edge top 100 gamesIt's [url=http://www.next-gen.biz/index.php?option=com_content&task=view&id=6231&Itemid=2]the top 100 games of all time[/url] from the last 15 years

    ... , etc),
    Co-op and Counter-op modes,
    Music.
    ewgf ewgf July 2007 Chit chat
  • Edge top 100 gamesIt's [url=http://www.next-gen.biz/index.php?option=com_content&task=view&id=6231&Itemid=2]the top 100 games of all time[/url] from the last 15 years

    ... , etc),
    Co-op and Counter-op modes,
    Music.
    The Starglider The Starglider July 2007 Chit chat
  • Edge top 100 gamesIt's [url=http://www.next-gen.biz/index.php?option=com_content&task=view&id=6231&Itemid=2]the top 100 games of all time[/url] from the last 15 years

    ... , more gameplay modes (co-op, counter-op, enemy rockets etc)?
    ewgf ewgf July 2007 Chit chat
  • 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…

    ... // message to scroll
    counter = 0;
    disp = ... }

    if (++counter == 16) // if unseen fat ... displayed
    {
    counter = 0;
    d_PrintDoubleW(m_ptr ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... checked with Spectaculators T state counter, no mental gymnastics required :)
    counter/2)) & 0x01" expression to ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... /> [code]
    a generic loop counter
    b
    c
    Digital Prawn Digital Prawn July 2007 Development
<1…18192021222324…34>

Latest Posts

  • Minor British Sports that did become games on the ZX Spectrum
    dmsmith on April 22
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on April 22
  • Goodbye Z80
    moggy on April 22
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on April 22
  • Another Birthday! The Game Boy Is 35!
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  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on April 22
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on April 22
  • New video about S-video modification on Issue two 48K Spectrum.
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