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<1234567…34>
  • VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…

    I have written a VSYNC function, so that I can clear ...
    robpearmain robpearmain May 2004 Development
  • Help needed to speed up functionCan anyone help me to re-factor this code snippet. The "MAP" section holds information about which tiles go where on the screen (handled by another f…

    ... the screen (handled by another function. The following code uses the ...
    Mr Millside Mr Millside February 2005 Development
  • Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…

    ... feedback for re-factoring my function that displays the colour for ... some help to improve the function that draws the tiles ? As ...
    Mr Millside Mr Millside February 2005 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... (graphics only) or 2- (mask, graph) byte definitions. Note that the ... (mask,graph) pairs are in a different ... suffer from the move sprite function overhead so it may ... display following a move sprite function.

    9. Sprites ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Possibly a little OT: Exporting ROM function addresses to the Z88DKOK, so I'm using the Z88DK. It's entirely possible that some documentation has bypassed me. But assume I have a function in ROM, say, at address 0xF0…

    ... . But assume I have a function in ROM, say, at address ... of telling the linker that function "bar" lives at address 0xF00 ... just used a small wrapper function, but this is desperately inefficient ...
    Winston Winston April 2007 Development
  • The Konix Liberator 10 Function Interface.In the 'What We Got' thread JP asked if I could upload some pictures of my Konix Liberator. Well here they are, well some of them. The rest are on my…

    ... Liberator is a rareish 10 function interface from the 1986-87 ...
    Scottie_uk Scottie_uk May 2009 Sinclair Miscellaneous
  • 128k editor undelete function?I was reading the "Spex" section in an issue of NCE, which gave some of the extended keyboard functions which replicate the external keypad functions…

    ... , there was a line undelete function - Extended Mode N.

    function anywhere there either.

    function to have.
    Battle Bunny Battle Bunny May 2011 Sinclair Basic
  • traversing a multi-vertices graph structureWell, I'm on redesigning the route evaluation routine in my Fighting Fantasy utility, as the current method has some intractable bugs in it. The part…

    ... whole area of mathematics on graph theory, but the algorithms which ...
    Battle Bunny Battle Bunny August 2011 Development
  • SpecBAS INT function vs Spectrum INT functionDunny's SpecOS (SpecBas) vs Normal Spectrum Basic. INT function The Spectrum rounds -ve INT values down (e.g. INT -2.2 = -3) whereas SpecBas rounds…

    ... Spectrum Basic.

    INT function

    The Spectrum rounds ...
    BloodBaz BloodBaz November 2011 Emulators
  • Undefine functionHere's a routine to selectively remove variables from the VARS area and reclaim the space. This can be done partially from BASIC already by assigning…

    ... : equ 23645

    ;stack function parameters passed from BASIC by ...
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • stuck on recursive functionI want this function to PEEK 'l' bytes from memory starting at 's' and return them as a string, but however much I fiddle about with quoting and pare…

    I want this function to PEEK 'l' bytes from ...
    Battle Bunny Battle Bunny February 2012 Sinclair Basic
  • Calendar function fixedJust noticed that the vBulletin calendar function was still set to end in 2010. :oops: This has been corrected.

    Just noticed that the vBulletin calendar function was still set to end in 2010. :oops:
    This has been corrected.
    mheide mheide March 2012 Sinclair Miscellaneous
  • Sprite Design-Graph Paper?I have a question which comes about after my little adventure earlier today:- As i have quite a few speccy projects in progress at the moment I have …

    ... need to draw sprites using graph paper,i had a ... a shop that sold graph paper.I tried the ... :(,i finally found some graph paper pads in Staples but ... the end i downloaded a graph paper stencil and are ... design sprites 8x8 or bigger?,graph paper,software or some ...
    jammajup jammajup April 2012 Development
  • number padding functionI wrote a number padding function in BASIC a while ago, but when I came to want it again I couldn't find it, so I've done this enhanced [url=http://w…

    I wrote a number padding function in BASIC a while ago, ... /pourri/padnum.asm]PadNum[/url] function in assembler. As per usual ...
    Battle Bunny Battle Bunny May 2012 Sinclair Basic
  • Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…

    ... to view the memory in graph form... If that makes any ... ZX Spin has a similar function, but I cant find it ...
    daveysludge daveysludge February 2013 Development
  • Z80: ABS(HL) functionI must be very tired but I cannot get my head around whether this function provides a correct implementation of a ABS function for a signed 16-bit va…

    ... my head around whether this function provides a correct implementation of ... a ABS function for a signed 16-bit ...
    BloodBaz BloodBaz January 2014 Development
  • hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…

    ... using a simple Pearson hash function to generate keys for a ...
    Battle Bunny Battle Bunny January 2014 Development
  • eVALuating $ in +3 BasicHi all, I was very interested in the thread below about re-starting Basic, and remember reasonable amounts from zx81 and early Spectrums. But I now h…

    ... to enter a $ containing a Function of x like: "10*TAN ... to the y variable - the Graph then Plots x,y.
    function with x as the argument ...
    sliderules sliderules March 2014 Sinclair Basic
  • Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…

    ... the result of the add function to screen address 16386
    slenkar slenkar April 2016 Development
  • Function works in SpecBAS but not BASinSo, is there any reason why this user defined function works in SpecBAS but not BASin? [code] 10 DEF FN m$(a$,n1,n2)=a$(n1 TO n2) 20 LET a$="The…

    So, is there any reason why this user defined function works in SpecBAS but not BASin?

    [code]
    10 DEF FN m$(a$,n1,n2)=a$(n1 TO n2)
    20 LET a$="TheManInTheMoon"
    50 PRINT FN m$(a$,12,15)
    60 STOP
    [/code]
    Richey Richey May 2016 Sinclair Basic
  • ZX Speccy +2A - B&W & snowy RF output + other issuesHi All, I am new to this forum and I am back to the Spectrum world after 25 years. Recently I've bought a second hand +2A (+2B board - Z70833 Issu…

    ... . A few function keys don't work (Break, Edit, Delete, Graph). Keyboard ...
    Claudius Claudius October 2016 Hardware
  • User defined function in Sinclair BASICI'm looking to create a user defined function in Sinclair BASIC to add up numbers being input. This is the program without a user defined function be…

    ... to create a user defined function in Sinclair BASIC to add ... program without a user defined function being used

    [code ...
    Richey Richey February 2017 BASIC
  • Interface devices interfering with keyboard functionHi, After over 20 years away from owning a ZX Spectrum +2, I recently bought a reconditioned ZX Spectrum + and, after reading about some of the ne…

    ... interfere with the keyboard's function, notably the "N" and "M ...
    Winfield Winfield July 2017 Hardware
  • Emulator with print function?Is there an emulator that can LLIST to a standard printer? Speccy does have a function to dump a graphical version to a text file, but it's a pain th…

    Is there an emulator that can LLIST to a standard printer? Speccy does have a function to dump a graphical version to a text file, but it's a pain then getting that to print properly.
    Bad Horsey Bad Horsey August 2017 Emulators
  • forum software that doesn't have a "delete account" function?hard to belive that perhaps Noah build this software, by the looks of it. as it doesn't have the function to delete accounts. I'm sure it does.. I…

    hard to belive that perhaps Noah build this software, by the looks of it. as it doesn't have the function to delete accounts.

    I'm sure it does.. I don't want my account on here in any form.. *THAT* simple
    fog fog February 2018 Chit chat
  • Question about the "Color" function of the number keysI'm very new to Spectrum. What was the purpose of the color function of the number keys?

    I'm very new to Spectrum. What was the purpose of the color function of the number keys?
    wongojack wongojack September 2022 Sinclair Miscellaneous
  • did anybody program games for their spectrum?did anybody make games for their spectrum and have you still got them in tap/z80 format. i once attempted to make a side scrolling game but it didn…

    ... made a trignometric function graph plotter (enter function and watch the graph being plotted ...
    Arjun Arjun December 2002 Games
  • 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…

    ... of that specific output function - just a graph of the exponential output ...
    cyborg cyborg March 2004 Sinclair Miscellaneous
  • 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…

    ... of that specific output function - just a graph of the exponential output ... function.
    [/quote]

    I ...
    Alcoholics Anonymous Alcoholics Anonymous March 2004 Sinclair Miscellaneous
  • Chuntey - what a fantastic word!Just thought I'd share that

    ... at all, and ALL the ?function keys? on the left side ... (true video, inv video, delete, graph, extend mode, edit, caps shift ...
    de Vandemar Croup de Vandemar Croup December 2005 Sinclair Miscellaneous
<1234567…34>

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  • VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
  • Help needed to speed up functionCan anyone help me to re-factor this code snippet. The "MAP" section holds information about which tiles go where on the screen (handled by another f…
  • Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
  • Possibly a little OT: Exporting ROM function addresses to the Z88DKOK, so I'm using the Z88DK. It's entirely possible that some documentation has bypassed me. But assume I have a function in ROM, say, at address 0xF0…
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