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<1…19202122232425…34>
  • A doubt about IN and OUTIN (and OUT) can use bc to define a 16 bit port to be read or write, when used as in r,(c) or out (c),r. Also, if you use in a,(n) or out (n),a yo…

    ... (a dumb one) is... what value is used as the high ... ? It is zero, $ff, the value of b or is undetermined ...
    Zup Zup January 2016 Development
  • Harlequin Rev. G - Composite video problem.What I'm about to describe I'm not experiencing it by myself, so the probable answer to any "have you tested this or that" question is no, I don't, b…

    ... to specs, with correct face value componets, no shorts... and the ...
    GroovyDrifter GroovyDrifter January 2016 Hardware
  • Text scroller and custom fontYesterday I was testing this text scroll routine taken from Jonathan Cauldwell's Intro Maker (labels have been inserted to allow partial code relocab…

    ... the instructions to alter the value of CHARS in between them ...
    Alessandro Grussu Alessandro Grussu January 2016 Development
  • Games on ebay, Ultimate Play the Game, etcI have no clue if this is 'wanted' here or not. Please delete if you consider this inappropiate. I am advertising my own ebay auctions. Not to max ou…

    ... . Not to max out the value but to avoid games gone ...
    enthusi enthusi February 2016 Sales
  • Calling machine codeOccasionally I see on ZX computers (mostly the spectrum, but I think also the '80 and '81), how someone made their machine code and wrote the bytes i…

    ... not interested in the return value.

    As I recall ...
    wilsonsamm wilsonsamm February 2016 Sinclair Miscellaneous
  • Reading PC text files from BASIC!I was playing around with my DivMMC Enjoy! and managed to work out that it's dead easy to load PC .TXT files into the Speccy - I've got them viewable…

    ... ) Set RAMTOP to a suitable value to provide space for the ...
    PrimitivePerson PrimitivePerson February 2016 Sinclair Basic
  • Value of Classic Arcadia CollectionHi, I am looking to sell this Classic Arcadia Collection game which includes Classic Arcadia Collection 1 & 2 but I have no idea what it might be …

    Hi,

    I am looking to sell this Classic Arcadia Collection game which includes Classic Arcadia Collection 1 & 2 but I have no idea what it might be worth.

    [img]http://i1291.photobucket.com/albums/b550/andyj78/Mobile% ...
    AndyJ78 AndyJ78 March 2016 Games
  • Which peripheral listened on port $9f from back in 1984 (Chuckie Egg related)Hi Apologies if this is in the wrong section, please feel free to move it to the correct one if so. I've been looking through the Chuckie Egg c…

    ... ISR does is output a value on said port number. ... in the form of duration, value, where duration is a frame ... ISR) held at $7373 and value [i]might[/i] be ... a MIDI note value. A pointer to the ... current tuple of duration, value is held at $7374 and ...
    cmonkey cmonkey March 2016 Hardware
  • New debugger features for ZEsarUX-4.1Hi I haved added new breakpoint conditions on ZEsarUX, the following 8 allow to put a breakpoint when accessing memory or i/o ports: MRV: value…

    ... :

    MRV: value returned on read memory operation ...
    MWV: value written on write memory operation ... memory operation
    PRV: value returned on read port operation ...
    PWV: value written on write port operation ...
    chernandezba chernandezba March 2016 Emulators
  • Publishers logos and biosAs we are getting more development done, we are looking at extra details not currently available, so will be creating new categories asking for submi…

    ...
    Atlantis - 02
    Micro Value
    CodeMasters - Quattro Range
    Medusa
    Micro Value - 01
    Micro Value - 02
    Micromega ...
    Lee Fogarty Lee Fogarty April 2016 Publishers
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... /> ld de, #(constant value of scanline start)
    ldir ... br /> ld de, #(constant value of scanline start)
    ldi ... /> ld sp, #(constant value of scanline start + 12)< ... /> ld sp, #(constant value of scanline start + 24)< ...
    Sol_HSA Sol_HSA April 2016 Development
  • Simple Spectrum Character Creator Web AppHey guys, Here is a simple web app i wrote to create ZX Spectrum 8 x 8 characters: http://www.amelyn.com/speccy_character_builder/index.htm …

    ... on or off. The decimal value for each row is shown ...
    BigBadMick BigBadMick June 2016 Development
  • Anything valuable / rare in this lot?Hi all Been going through the cupboards here and discovered my old Spectrum tapes collection. Wondered if any of it had any real value? Happy to…

    ... of it had any real value? Happy to test these out ...
    Peter Rolls Peter Rolls June 2016 Sales
  • CollectablesI bought these a couple of days ago for £15 from a little shop down the road: Systema - Three Action Games In One Pack - 1301ARG [img]https://lh3…

    ... 's opinions on the possible value? After a Google search, I ...
    chriswyatt chriswyatt June 2016 Chit chat
  • Basin for Beginners questionI stumbled across [url="http://everychildcancode.org/basin/"]Basin for Beginners[/url] website when I was searching for a simple BASIC to start teach…

    ... ]'''' is not a valid integer value[/code]

    Lets say ...
    Pyjamarama Pyjamarama July 2016 Sinclair Miscellaneous
  • TommyGun with Debugginghttp://goo.gl/HfSXev?gdriveurl Ok, so this is a pretty big release for me and I have added a lot of stuff into the code editor. Mainly of course …

    ... emulator will instantly know the value in this feature.
    I ...
    Kiwi Kiwi July 2016 Development
  • Detecting TR-DOS w/o relying on system variablesOK, I know it's much easier to do this simply by checking whether the BASIC program area has moved or some specific pattern in the sysvars etc (somet…

    ... (sometimes even checking the current value of PC might do). But ...
    Hikaru Hikaru July 2016 Development
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... :
    ld a,(0x5b5c) ;previous value of port
    and %11110000 ... , screen_data
    ld b, 0x01 ; Value to write to the screen ...
    pointblnk pointblnk August 2016 Development
  • Speeding up programs by hacking the SysVarsPositively pleased to properly discover this area of the forum! I have a couple of recent tricks that might be of interest - they're probably old hat…

    ... , you can temporarily hack the value of PROG to be the ... value of NXTLIN, and from there ...
    Robsoft Robsoft August 2016 Sinclair Basic
  • ZX Spectrum video waveformsAll work for this post was done on a ZX Spectrum issue 1 board (16k bytes of RAM only). This was what the Spectrum displayed on the TV screen: [i…

    ... to add a negative offset value to get the waveform to ... to add a negative offset value to get the waveform to ...
    1024MAK 1024MAK September 2016 Hardware
  • YS/SU/Crash value charts...The amount of pages in each issue... [img]http://i.imgur.com/udaTdIi.png[/img] The price of each issue (er, ignore the $ sign, it should be £ of …

    The amount of pages in each issue...
    [img]http://i.imgur.com/udaTdIi.png[/img]

    The price of each issue (er, ignore the $ sign, it should be £ of course, but Excel has no easy way to change this)...
    [img]http://i.imgur.com/ ...
    peteprodge peteprodge September 2016 Magazines
  • So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…

    ... /> LD (addr),BC ; store the value at 'addr'
    RST #28 ...
    The_Bert The_Bert September 2016 Sinclair Basic
  • sdcc inline assembly wtf..So, I'm trying to get division to work. By googling I've found one division algorithm that's quoted in several places, but can't seem to get it to wo…

    ... can call ret, and return value is expected to be in ...
    Sol_HSA Sol_HSA September 2016 Development
  • Why doesnt this work???Simple piece of code wont do as it should, just want to fill the top 22 lines of screen with an attribute value (150) but it wont have any of it. Som…

    ... of screen with an attribute value (150) but it wont have ...
    daveysludge daveysludge October 2016 Development
  • Startup colours of the Spectrum ROMHi Folks, Thought I would have a go at changing the startup colours of the Spectrum ROMs used within BasinC which ships with 48.rom (16384 bytes) …

    ... changed:

    1. The value at offset 4557d to zero ... be black.
    2. The value at offset 4710d to four ... changed:

    1. The value at offset 20941d to zero ... be black.
    2. The value at offset 21094d to four ...
    Paddy Coleman Paddy Coleman October 2016 Development
  • Print (to screen) avalue held in a register pairHi guys, looking for a routine that will print any value from 0 to 65535 to the current position on the screen. I once heard that there was a PRIN…

    ... routine that will print any value from 0 to 65535 to ... routine that will print a value held in theBC register pair ...
    DEATH DEATH October 2016 Development
  • Is the Every child can code site still being maintained?ABS The ABS codeword tells the computer that your program wants to know the “ABSolute” value of a number. That is the value without a “+” or …

    ... wants to know the “ABSolute” value of a number. That is ... the value without a “+” or a “-“ sign ...
    mik3d3nch mik3d3nch October 2016 Sinclair Basic
  • Welcome to the Matrix!Ok here's something I been playing with while I'm at work and on public transport. I'm thinking I want to be able to move the large letters around th…

    ... the attributes to a previous value easily cause I don't ...
    ivanb303 ivanb303 October 2016 BASIC
  • SUB and the S flagGuys, if I use SUB to take a value HIGHER than is currently in A, does the S flag get set? I know that N does. [code] LD H,33d LD A,32d SUB H …

    ... use SUB to take a value HIGHER than is currently in ...
    DEATH DEATH November 2016 Assembler
<1…19202122232425…34>

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