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<1…21222324252627…34>
  • Using CP and JR Z commandI have been trying to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40011"]convert a BASIC routine to machine code[/URL], but to no av…

    ... A does not change, only flags are set. For example, A ...
    Shiru Shiru July 2012 Development
  • 128K+ Keypad Swapsies.I've been offered a swap, a Spanish 128k keypad, for one of my UK microdrives. Is this a good swap?

    ... ,l387c ; check bit 4 of FLAGS
    call l3a42 ; attempt to ...
    chev chev July 2012 Sinclair Miscellaneous
  • Oops, wrong flag!North Korean women's football team have reacted angrily to the South Korean flag being shown by accident on stadium screens during the warm-up. Not …

    Those Asian flags all look the same to me...
    beanz beanz July 2012 Chit chat
  • Olympics Who Will Be Watching.So who will be watching the opening ceremony tonight? As I live near Cardiff our Millennium stadium is hosting some of the football games. I thought…

    Let's hope they don't mix up the flags this time!:smile:
    zx1 zx1 July 2012 Chit chat
  • Switching 48/128 modes within a BASIC programI'm not sure what use this would be; ie. being able to switch between 48k and 128k modes and back again from within a continuously running BASIC prog…

    ... 9120: STOP
    2000 LET flags=PEEK 23611: LET bit4=INT ... (flags/16)-INT (flags/32)*2:
    LET ...
    Battle Bunny Battle Bunny July 2012 Sinclair Basic
  • Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…

    first milestone reached!
    Zymosis passes Mark Woodmass' Z80Tests ? both flags [b]and[/b] MEMPTR.

    this is 'final alpha'. for first beta i need to add some ifdefs to allow non-gcc compilation.

    i'm genius. no, really.
    Ketmar Ketmar July 2012 Emulators
  • Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…

    ... passes Mark Woodmass' Z80Tests ? both flags [B]and[/B] MEMPTR.
    rich_chandler rich_chandler July 2012 Emulators
  • Olympic Divers not so graceful[img]http://wac.450f.edgecastcdn.net/80450F/thefw.com/files/2012/05/funny-diver-faces-lead-image.jpg[/img] [img]http://wac.450f.edgecastcdn.net/80450…

    ... -zip-wire-carrying-two-Union-flags.html[/url]

    theres ...
    mel the bell mel the bell August 2012 Chit chat
  • Happy Birthday Dragon 32![url]http://www.reghardware.com/2012/08/01/the_dragon_32_is_30_years_old/[/url]

    [QUOTE=MattLamb;643766]I somehow ended up with about six copies of the manual, but never saw an example of the computer itself.[/QUOTE]

    well if you want to flog one let me know.. or I can trade you a few chequered flags :lol:
    fog fog August 2012 Chit chat
  • Happy Birthday Dragon 32![url]http://www.reghardware.com/2012/08/01/the_dragon_32_is_30_years_old/[/url]

    ... trade you a few chequered flags :lol:[/QUOTE]

    Sadly ...
    MattLamb MattLamb August 2012 Chit chat
  • 40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…

    ... /> org 64874
    ;****************************************************************************
    ; POKEable flags, 6 bytes
    ;----------------------------------------------------------------------------
    overflag ...
    uglifruit uglifruit August 2012 Development
  • SpecBAS 0.753 Now available!Hi again - Thanks to the efforts of ASH-II and Galileo, there's been another round of nice quick bugfixes: [code] v0.0.0.753 ========== Bugs fixe…

    ... out
    Key and mouse flags are cleared before a command ...
    moot moot August 2012 Sinclair Miscellaneous
  • syntax checking helpcan anyone help with syntax checking, its been a while since I did any basic extension coding this routine always gives :C nonsense in basic error …

    Are the numbers in the string being checked followed by $0E and then their 5-byte FP forms?
    If not, SCANNING will give a "Nonsense in BASIC" error if it's in run-time mode (FLAGS bit 7 set).
    Battle Bunny Battle Bunny October 2012 Development
  • syntax checking helpcan anyone help with syntax checking, its been a while since I did any basic extension coding this routine always gives :C nonsense in basic error …

    ... 's in run-time mode (FLAGS bit 7 set).[/QUOTE]
    FLAGS and running a syntax check ...
    madvanman madvanman October 2012 Development
  • Halo 4Halo 4 is great! At least it is so far, but I've only been playing it for a couple of hours. If you don't like the Halo games then this won't change …

    ... ...I constantly found myself defending flags or assisting people in killing ...
    deadpan666 deadpan666 November 2012 Chit chat
  • Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…

    ... add a,32 on the flags
    ret c ;in this ... add a,32 on the flags
    ret c ;224+32 ...
    R-Tape R-Tape November 2012 Development
  • Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…

    ... is $00) Z an C flags are set, so we must ...
    antoniovillena antoniovillena November 2012 Development
  • IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…

    ... code (my understanding of the flags was pretty flakey at the ...
    R-Tape R-Tape November 2012 Development
  • RET MHello. I?ve seen in the Joffa game SAUCER a kind of loop like this LOOP LD A,R RET M JR LOOP I do know what this loop mea…

    ... > Also how are the flags being affected for the RET ... R register to affect the flags.
    R-Tape R-Tape November 2012 Development
  • RET MHello. I?ve seen in the Joffa game SAUCER a kind of loop like this LOOP LD A,R RET M JR LOOP I do know what this loop mea…

    ... > Also how are the flags being affected for the RET ... R register to affect the flags.[/QUOTE]

    LD A ... load instruction, in which the flags are indeed affected by the ... for sure is that if flags are affected, it's because ...
    mcleod_ideafix mcleod_ideafix November 2012 Development
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... shows that the 5+3 flags after POP AF ; SCF and ... instruction didn't modify the flags, it was still OR. And ... if it did modify the flags, I realized I couldn't ... used instructions which set the flags based on A. I will ...
    Patrik Rak Patrik Rak November 2012 Emulators
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... the operations which affect the flags. I played with INC ... when an operation affects the flags, the subsequent SCF or ... operation doesn't affect the flags, the subsequent SCF or ... the copy of the flags register (or at least ... then merely sets 5+3 flags to ((Q^F)|A ...
    Patrik Rak Patrik Rak November 2012 Emulators
  • SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…

    ... instruction doesn't modify the flags, this register is reset ... A is copied to flags 5+3 after SCF/ ... previous operation did set the flags, whereas it is ORed ... it didn't set the flags. That explains why the ... the state of the known flags and registers.

    Patrik Rak Patrik Rak November 2012 Emulators
<1…21222324252627…34>

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