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<1234567…34>
  • What game defined the spectrumHello again,im in a posting mood today,lol. Anyway what game for you defined the spectrum? What i mean is for example,if you asked someone to name a …

    ... /> Anyway what game for you defined the spectrum? What i mean ...
    Andy Gurr Andy Gurr September 2001 Games
  • 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
  • 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
  • '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 …

    ... .0
    Altered parts are defined with *

    Dr Beep ... /> Also SCROLL added to PRINT USR 14700,d and interface testsoftware ...
    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
  • Random access, file sizes and more.A few days ago Aowen mentioned that random access to saved data is not a problem. Here are my thoughts, doubts and suggestions regarding this subject…

    ... load the data would be defined in the load command. If ... address n (which can be defined), but in chunks.

    USR to load the data the ...
    zxbruno zxbruno November 2008 Development
  • 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
  • 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
  • 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
  • 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
  • Request for help (Z80 gigascreen loader)Although I'd attempted to stick to keeping things simple in Image to ZX Spec now I've implemented Gigascreen (8x8 only) I've found the BASIC Gigascre…

    ... a slideshow with a user defined wait between slides (not gigascreen ... ;"NOTE: You must switch to USR 0"
    220 LET Y ... PRINT AT Y,1;"(type USR 0 to switch to 48K ...
    brownb2 brownb2 February 2011 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
  • Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…

    ... startaddress+1,0: LET l = USR startaddress: REM will return the ... startaddress+1,1: LET l = USR startaddress: REM will return the ... /QUIT
    ; or... Check the defined keys and return which are ... * check for any of the defined keys being pressed
    ; On ...
    polomint polomint September 2011 Development
  • Find-Fill-Copy functions for BASICThere's not much going on here, so here's three m/code routines to provide some data manipulation functions which are otherwise slow to do from BASIC…

    ... /> If no initialisation string is defined then 'copy' will start from ... routine, using either:
    "PRINT USR r0,p1[,p2...,pn],r1 ... FN f(p1[,p2...,pn])=USR r1"
    with separate BAS ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…

    ... destination variables can themselves be defined in variables (or expressions which ... v;
    11 PRINT USR id,v$,"=",v+VAL ("val ... The syntax is:
    ;PRINT USR indirect,arg1,op,arg2;
    ;PRINT USR indirect,arg1,op,arg2;
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…

    ... />
    when run using RANDOMIZE USR location i just get 'B ... hl,blocks ; address of user-defined graphics data.
    ld (23675 ... ,144 ; ASCII code for User Defined Graphic 'A'.
    rst 16 ...
    Saboteur Saboteur May 2012 Development
  • BIFROST* Advanced Programming - part 3This new demo demonstrates the BIFROST* built-in sprite support that I mentioned before. In BIFROST*, "sprite tiles" are 2 special tiles that BIFROS…

    ... happens periodically for every tile defined in the tile map), it ... "bifrost_h3"CODE
    * 50 RANDOMIZE USR VAL "32768"
    *
    * Original ...
    Einar Saukas Einar Saukas July 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: 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…

    ... above, the character pixels are defined in a smaller 5x5 grid ... : LOAD "FZXdriver"CODE 65000: RANDOMIZE USR 65000[/CODE]

    Afterwards ...
    Einar Saukas Einar Saukas June 2013 Brand new software
  • MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …

    ... :
    REM RESTORE USR DOINT : do stuff : RESTORE USR NOINT:
    REM ... replace USR labels with the ... BASIC
    ; object properties are defined in the DISPLAY & ACTION ...
    Battle Bunny Battle Bunny September 2013 Sinclair Basic
  • SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…

    ... $() is defined as DEF FN c$(r,c)=STR$ USR ScrDol0 .
    Battle Bunny Battle Bunny October 2013 Sinclair Basic
  • Basic program not workingHi guys, Please can someone tell me why I get an error when I try and make 9 user defined graphics please?? B Interger out of range :( 10 for n=…

    ... try and make 9 user defined graphics please??

    B ...
    30 read a: POKE USR p$+f,a
    40 ...
    Welling Welling February 2015 Sinclair Basic
  • Help With AY Music Program in BASICHi, last year I started writing a BASIC program for making and recording AY Music. I thought it would be easier than learning how to use Soundtracker…

    ... READ y
    34 POKE USR "b"+x,y: REM ... READ y
    44 POKE USR "c"+x,y: REM ... y
    54 POKE USR "d"+x,y: REM ... READ y
    104 POKE USR "i"+x,y: REM ... READ y
    114 POKE USR "j"+x,y: REM ... awkward if this is not defined before scanning for keypresses< ...
    RetroPhase2014 RetroPhase2014 December 2015 Sinclair Basic
  • 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…

    ... why is it called RANDOMIZE UsR what does randomising have to ... you type RANDOMIZE USR x. Why not RUN USR x ? I just ... tried PRINT USR 65368 it resets the machine! ...
    ivanb303 ivanb303 October 2016 Sinclair Basic
  • Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…

    ... form, thus ensuring that the USR call returns the required decimal ... at the end, so that "USR nnnnn" can be used in ... method to return from a USR call with a floating point ... pointers to be returned from USR calls. Refer to the "Strings ...
    Battle Bunny Battle Bunny January 2017 Sinclair Basic
  • 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…

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

    Richey Richey February 2017 BASIC
<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…
  • What game defined the spectrumHello again,im in a posting mood today,lol.<br /> Anyway what game for you defined the spectrum? What i mean is for example,if you asked someone to n…
  • 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…
  • 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…
  • 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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