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<1234567…34>
  • multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…

    Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width is
    Battle Bunny Battle Bunny October 2012 Sinclair Basic
  • Randomize USR xxxxxA weird topic: When I was a kid I use to mess around with the RANDOMIZE USR xxxxx, sad I know!!! For instance RANDOMIZE USR 51234 would give me a loa…

    ... mess around with the RANDOMIZE USR xxxxx, sad I know!!!
    For instance RANDOMIZE USR 51234 would give me a ...
    Anonymous Anonymous June 2002 Sinclair Miscellaneous
  • Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…

    ... to start it by RANDOMIZE USR xxxxx. Which parameters should I ...
    MrShhh MrShhh March 2003 Sinclair Miscellaneous
  • Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…

    ... pixel left or right horizontal scroll of the spectrum screen.
    scroll with:
    ... rl (hl)/dec ...
    rtunes rtunes March 2003 Sinclair Miscellaneous
  • POKE, PEEK and RANDOMIZE USRAnyone got a store of useful POKES, or RANDOMIZE USR statements with interesting effects? As a start, try anything from RANDOMIZE USR 1216 to RANDOM…

    ... of useful POKES, or RANDOMIZE USR statements with interesting effects?
    USR 1216 to RANDOMIZE USR 1327. This should ...
    The Mighty Dopethrone The Mighty Dopethrone October 2003 Sinclair Miscellaneous
  • scroll?Hey guys! Great website! Is there anyway I can make my 128 not say "scroll?" and just make it scroll automatically?

    Hey guys! Great website!

    Is there anyway I can make my 128 not say "scroll?" and just make it scroll automatically?
    JohnDoyle JohnDoyle January 2004 Sinclair Basic
  • How can I scroll a line of text and wrap perfectlyI know this is easy for most of you but for some reason I am messing it up. In Assembly Language I want to do the following: I have 1 line of text …

    ... Pixel Rows). I want to scroll the whole line left one ...
    robpearmain robpearmain October 2004 Development
  • 'usr 0 mode'Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?

    Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?
    PopoCop PopoCop November 2005 Sinclair Miscellaneous
  • PLanning ZX-PC Interface releasesHello everyone. I am working on some additional functions to the ZX-PC Interface. Might take a while before all functions are operational, but here …

    ... ;"NAME"
    Also SCROLL added to PRINT USR 14700,d and interface ...
    Dr BEEP Dr BEEP January 2007 Development
  • Those RANDOMIZE USR lines that look like tape loading...I often see on here people mentioning those RANDOMIZE USR lines which when entered, seem to simulate a tape loading, with the colours and lines in th…

    ... here people mentioning those RANDOMIZE USR lines which when entered, seem ... first ever found was RANDOMIZE USR 1280 which shows blue and ...
    alexsut alexsut April 2007 Sinclair Miscellaneous
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... /> start with CLS, then RANDOMIZE USR 32000

    and ... comments)

    [code];scroll down 1 pixel at a ... repeating the pixel scroll
    dec b ;one scroll less to ... ;otherwise continue with another pixel scroll
    endroutine
    ret< ...
    bigjon bigjon February 2008 Development
  • How to avoid paging (scroll message)After 22 lines, the Spec asks if you want to scroll or break. I want to avoid that message and what the program to go on and produces lines on the sc…

    After 22 lines, the Spec asks if you want to scroll or break. I want to avoid that message and what the program to go on and produces lines on the screen without stopping for this message. Is there a trick?
    georgedb georgedb May 2008 Sinclair Basic
  • Disabling scroll? at the bottom of the screen.Everyone must have written something similar to: 10 PRINT "HELLO" 20 GO TO 10 at some point in their lives. But when you get to the bottom of the s…

    ... you if you want to scroll. How do I stop that ...
    Shaun.Bebbington Shaun.Bebbington September 2008 Sinclair Basic
  • Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…

    ... />
    I know that USR 0 simply causes the CPU ... advantages for the program does USR 0 mode offer over ... program that might require a USR 0 style setup) could, ... place, and do whatever else USR 0 mode does, then ... on the user to type USR 0 before running the ...
    ewgf ewgf December 2008 Sinclair Miscellaneous
  • New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…

    ... j: PRINT AT 0,6;USR 33001;AT 0,0;"score ... ),a
    ld hl,23263 ;scroll road
    ld de,23295 ...
    bigjon bigjon December 2008 Development
  • Help! USR 0 mode?Right, first of all, I know that this is in the wrong forum, and secondly it's maybe against the TOS anyway, as it's just asking people to read and p…

    ... />
    I've asked about USR 0 mode, and whilst I ...
    ewgf ewgf December 2008 Emulators
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... br /> ;print car
    ;scroll road
    ;random road left ... 0; "Your score was "; USR 33000
    Now RUN ... />
    CHAPTER 4 - scroll and move the road, keep ... adjust speed.
    To scroll the road down the screen ... br /> ld hl,23263 ;scroll road
    ld de, ...
    bigjon bigjon November 2009 Development
  • Randomize usrHi, I've often wondered why/how they came up with RANDOMIZE USR <memory address> to invoke machine code couldn't they have used a better keyword (e…

    ... came up with
    RANDOMIZE USR to invoke machine code

    I read somewhere that USR is the keyword that executes ...
    saiwong saiwong December 2009 Sinclair Basic
  • Usr 0I have noted there are some games / applications / demos which have to be loaded in USR 0 mode on a 128K Machine ("Randomize USR 0" in 128K BASIC the…

    ... have to be loaded in USR 0 mode on a 128K ... Machine ("Randomize USR 0" in 128K BASIC then ... is the case, and what USR 0 actually DOES?
    Swevicus Swevicus January 2010 Hardware
  • Star Wars scroll/crawl/title effectI may have seen this type of scroll on a Speccy game before, but I've never seen it as a type-in or part of a cover tape. Does anyone know how to do …

    ... have seen this type of scroll on a Speccy game before ...
    zxbruno zxbruno January 2010 Sinclair Miscellaneous
  • Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…

    ... , it's apparent that the USR entry point is not 30000 ... do I work out the USR address to start the machine ...
    Battle Bunny Battle Bunny June 2010 Development
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... I "discovered" a strange RANDOMIZE USR. This is it:
    ... [b]RANDOMIZE USR 46578[/b]

    USR in an emulator in ... happening here. The RAND USR proposed just begins executing ... parameter for the RAND USR, the pattern doesn't ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... . If hardware scroll is supported, use smoth scroll (1 pixel scroll). In this ... supported, use 2 pixel step scroll. Also this code need more ... />
    My idea for hardware scroll is simple. Store in a ...
    antoniovillena antoniovillena October 2011 Development
  • joining lines of BASICDue to overwhelming demand - well, one demand - well, more of a suggestion, really - here's a routine to join together lines of BASIC. The vertical c…

    ... new. LOAD at 65023, RANDOMIZE USR 65136 to enable, 65146 to ... out of editing mode to scroll up/down through the full ... />
    Not being able to scroll through the listing while editing ...
    Battle Bunny Battle Bunny February 2012 Sinclair Basic
  • Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…

    ... of the available routines to scroll the entire screen in any ... that would allow me to scroll a specified column (1 x ...
    zxbruno zxbruno May 2012 Development
  • emulators which support H/V scroll bars?You know, for years I've been using Fuse with a pokey little 4" window and moaning about it because the resize arrows didn't (appear to) work, then I…

    ... of it and a vertical scroll bar appears at the right ...
    Battle Bunny Battle Bunny May 2012 Emulators
  • BASIC printer drivers for proportional and 6x8 printingcore features: * fully relocatable code; just do LOAD "" CODE startaddr:RANDOMIZE USR startaddr with any 'startaddr' * do POKE (startaddr+1),chan…

    ... LOAD "" CODE startaddr:RANDOMIZE USR startaddr with any 'startaddr'
    USR to select channel (default is ... +3),0 to turn off 'scroll?' query
    * do POKE ... +3),1 to turn on 'scroll?' query (default state)
    * ...
    Ketmar Ketmar September 2012 Development
  • USR 0I've heard a lot about loading a program in USR 0 (and yes, I know how to do it - "RANDOMIZE USR 0" in 128 BASIC). What I want to know is: What is th…

    I've heard a lot about loading a program in USR 0 (and yes, I know how to do it - "RANDOMIZE USR 0" in 128 BASIC). What I want to know is: What is the point of loading a program in USR 0 mode, and what does it actually DO?
    Swevicus Swevicus November 2012 Hardware
  • FZX ScrollI wrote a routine to scroll message in ZX Spectrum screen, using [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44088"]FZX[/URL] fonts.…

    I wrote a routine to scroll message in ZX Spectrum screen, ... . Feel free to use FZX Scroll.

    The [URL="http ...
    TK90XFan TK90XFan June 2014 Development
<1234567…34>

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  • RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
  • Randomize USR xxxxxA weird topic:<br /> When I was a kid I use to mess around with the RANDOMIZE USR xxxxx, sad I know!!!<br /> For instance RANDOMIZE USR 51234 would g…
  • Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
  • Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen.<br /> <br /> <br /> I can make a 1 one pixel scroll…
  • POKE, PEEK and RANDOMIZE USRAnyone got a store of useful POKES, or RANDOMIZE USR statements with interesting effects?<br /> <br /> As a start, try anything from RANDOMIZE USR 12…
  • scroll?Hey guys! Great website!<br /> <br /> Is there anyway I can make my 128 not say "scroll?" and just make it scroll automatically?
  • How can I scroll a line of text and wrap perfectlyI know this is easy for most of you but for some reason I am messing it up.<br /> <br /> In Assembly Language I want to do the following:<br /> <br /…
  • List of RANDOMIZE USR code effects?Hi chaps,<br /> Does anyone have one of these please?<br /> Thanks.
  • 'usr 0 mode'Can anybody explain why some programs can't be just loaded after turning spectrum on but you must type 'usr 0' before loading them?
  • What's the RAND USR code for the test screen?And what versions of hardware does it work on?<br /> <br /> Ta!

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