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  • Need help with small asm piece of codeI could use some help. I have a number in A register. It can be 1,2,4 or 8 (always only one bit is set) I need to make number transformation: 1 ->…

    ... keys
    cpl ;invert bits
    and 31 ;keep bits we want and ... carry
    rra ;put movement bits in their place
    jr ...
    Metalbrain Metalbrain March 2010 Development
  • copy protection on +3?so how do you remove copy protection from .dsk? I have an original diskette (game compilation that came with +3) and want to make backup. I copied it…

    ... that track it gives different bits (error). so the copy protection then ... because that one returns same bits every time. or something like ...
    orange orange May 2010 Games
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... , we may not need to invert bits anymore. Instead of this:
    bits
    rld_next:
    call next_bit ... ; bit marker to load 4 bits
    rld_next:
    call next_bit ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • How would you do a negative image ?So I want to invert a Speccy bitmap. What would be the fastest and easiest way to this ? I've been using this a lot but I can't see how I could achi…

    ... byte from screen
    cpl ;invert bits
    ld (hl),a ;put ...
    R-Tape R-Tape December 2016 Assembler
  • Complete Spectrum ROM Disassembly error?I've discovered what looks like an error in the [url=ftp://ftp.worldofspectrum.org/pub/sinclair/books/CompleteSpectrumROMDisassemblyThe.txt]online ve…

    ... discovered what looks like an error in the [url=ftp://ftp ... />
    [code]05CA LD-8-BITS CALL 05E3,LD-EDGE-2 ...
    StuBruise StuBruise August 2006 Sinclair Miscellaneous
  • SpecBAS 0.900 ReleasedAgainst my better judgement, here's 0.900. It's got lots and lots new, but mostly the new shiny is the editor. You can indent your code, you can e…

    ... ) invert (or reverse the order of) m lower-order bits in ... n
    INPUT ERROR now takes an ...
    Fixed cursor overwriting Error status letter
    Fixed ... editor
    Fixed erroneous error marker when executing an evaluation ...
    Dunny Dunny April 2017 Sinclair Basic
  • Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…

    ... br /> ;; output
    ;; a=error code
    ;; ------------------------------------------------------------
    _rs232_read: ... ;; 3. ready to receive data bits
    data_bits:
    ... />
    stop_bit:
    ;; invert c to get real value ...
    tstih tstih May 2011 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... non-zero
    ccf ;invert carry
    .exit:
    bits
    ; (on high ... ifndef .theme_set
    .error No theme selected
    ...
    stephenw32768 stephenw32768 August 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... if non-zero
    ccf ;invert carry
    .exit:
    ;; indicate load error by clearing both carry ... cp 0x41 ; compare against current bits (7T)
    ; (on ...
    stephenw32768 stephenw32768 August 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... cp 0x41 ; compare against current bits (7T)
    ; (on ... 13T
    xor 8 ; invert test (7T)
    ld (. ... a bit more margin for error than before.

    stephenw32768 stephenw32768 August 2013 Development
  • 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…

    ... error if not
    .ifdef ROM0
    ld b, a ; invert ... and %11111000 ; preserve high five bits
    xor b ; xor ... three
    sla c ; bits
    xor c ; combine ... three
    srl c ; bits
    xor c ; combine ...
    chev chev October 2013 Development
  • FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…

    ... [/B] (OR, XOR, CLEAR and INVERT)

    * [B]added ... fit the window vertically, an error is indicated.

    * [ ... function (the OR/XOR/CLEAR/INVERT draw functions)
    3.. ... mask (set bits indictae which existing attribute bits are kept when ...
    Alcoholics Anonymous Alcoholics Anonymous January 2015 Brand new software
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... we invert polarity? Let's record each byte using 9 bits. After ... 8 bits contain more "1"s than "0"s, then invert all ... . For 6-8, we invert the byte an add an ... if it's 1 invert the previous 8 bits. If we have ... it must be a load error because it should be impossible ...
    Metalbrain Metalbrain January 2016 Development
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... encoded in 8 or 9 bits, depending on the number ... of 1 bits: for 0-2, ... For 6-8, we invert the byte an add an ... To decode, read 8 bits, if we have 0-2 ... it's 1 invert the previous 8 bits. If we have ... must be a load error because it should be impossible ...
    Einar Saukas Einar Saukas January 2016 Development
  • So I did a thing...And it's nearly ready for release: [img]http://s18.postimg.org/4453ayo5j/Screen_Shot_2016_03_30_at_16_18_17.png[/img] Apologies for the enormou…

    ... ,m) invert (or reverse the order of) m lower-order bits in ... n
    INPUT ERROR now takes an ... -do the INPUT when an error occurs
    64bit and 32bit ... and TOKEN$ no longer crash/error with an empty string
    Dunny Dunny April 2016 Sinclair Basic
  • Speccy bits for sale/swapBeen digging about in the attic today and found two Speccy related bits. a 16k RAM pack for a ZX81 and a DK'Tronics Lightpen for a 48k Speccy Both …

    ... and found two Speccy related bits.

    a 16k RAM ...
    zeropolis79 zeropolis79 September 2002 Sales
  • [NEW]: Spectaculator 4.0Hi everyone, Finally managed to finish it... enjoy! --- [NEW]: Spectaculator 4.0 Spectaculator is a Sinclair ZX Spectrum emulator for PCs runnin…

    ... never start or stop in error. If you do find a ... 2
    keyboard and Kempston bits are now also read and ... reports R Tape
    loading error.

    o A few ...
    Jon Needle Jon Needle January 2003 Emulators
  • BASin Release 6 available for DownloadHi all - It's another cut'n'paste from CSS :) I've been tapping away again, and seeing as a couple of people have recently seen BASin's latest bits…

    ... seen BASin's latest bits, I thought I'd ... the bottom of the error boxes will prevent BASin ... the appropriate help.
    Added Error Message boxes - 0 Ok, ... short description of each error, and options to return ... GOTO line numnber and GOTO Error options - a quick ...
    Dunny Dunny June 2003 Emulators
  • Bits and PiecesAnyone remember the Saturday Show called Bits and Pieces ? Probably the 1st proper show dedicated to computers and games. I remember they used to h…

    ... remember the Saturday Show called Bits and Pieces ?

    Probably ...
    LOAD&quot;&quot; LOAD"" July 2003 Games
  • Error trying to buy SpectaculatorAfter prosessing the order this error occurs Your transaction failed for the following reason: eSellerate was unable to process your credit card. Pl…

    After prosessing the order this error occurs

    Your transaction ...
    DodgyGeezer DodgyGeezer April 2004 Emulators
  • Error SheetIs there a web site for speccy book errors? I/m after the error sheet for Mastering M/C on your speccy by Toni Baker. Anybody got a scan? Dose anybod…

    ... ?
    I/m after the error sheet for Mastering M/C ...
    Steve(spt) Steve(spt) May 2004 Sinclair Miscellaneous
  • A NEW GREAT ZX-DEMO: GENETIC ERRORit seems here is a final version of awaited demo GENETIC ERROR: [url="http://scenergy.natm.ru/files/ge.zip"]http://scenergy.natm.ru/files/ge.zip[/url…

    it seems here is a final version of awaited demo GENETIC ERROR:
    [url="http://scenergy.natm.ru/files/ge.zip"]http://scenergy.natm.ru/files/ge.zip[/url]

    enjoy! :)
    Yerz Yerz September 2004 Sinclair Miscellaneous
  • Spin error because of extra HD being full?Ok ... several moons ago I posted here saying I had probs with Spin. I was told to del the cfg file and all was good. BUT Now I have the same prob…

    ... both instances. If the full error is to blame then I ... also wonder if two error prompts is the reason why ... . If this is a known error then I hope to get ...
    Skarpo Skarpo March 2005 Emulators
  • Bring Back BitsYou may remember the Channel 4 show 'Bits' which was on late every sunday night before it disappeared with no explanation. It featured Aleks Krotoski…

    ... remember the Channel 4 show 'Bits' which was on late every ... is - does anyone know if Bits will ever again be made ...
    Ian Hamilton Ian Hamilton April 2005 Chit chat
  • Tap file creation, parity error.Hi, I didn't know where to post this question so I've put it here :) I'm writing a program to convert an ascii file into a Spectrum .tap file (yes,…

    ... taputils there is a parity error within the data block, the ...
    Who? Who? May 2005 Sinclair Miscellaneous
  • Q on WoS 404 error.Hey ... wasn't this error (the text within the flashing red box)in Captive (for the Atari ST) ??? [url="http://geocities.com/justabunchofpixels/WoS-…

    Hey ... wasn't this error (the text within the flashing red box)in Captive (for the Atari ST) ???

    [url="http://geocities.com/justabunchofpixels/WoS-404.jpg"]http://geocities.com/justabunchofpixels/WoS-404.jpg[/url]

    Skarpo
    :)
    Skarpo Skarpo June 2005 Sinclair Miscellaneous
  • Is there anything similar to RZX files for other 8 bits computers?Perhaps this is off-topic, but I need help with this question. I'd like to know if there is anything similar to rzx files for computers like MSX, C64…

    ... same thing with other 8 bits computers (if possible).
    Thanks ...
    zyloj zyloj July 2005 Games
  • Spin v0.504 - "R Tape loading error"?Has anybody else had the problem that when you turn off all the tape-loader optimisations (Standard blocks, Edge loader & Byte loader), loading any T…

    ... in an "R Tape loading error" at the end of the ...
    bobs bobs November 2005 Emulators
<1234567…34>

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