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<1234567…34>
  • checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…

    ... b$(b,u)=("" AND USR u)+"0000000000000000"
    ... $(b,u)=("" AND USR u)+"0000000000001110": REM ... DATA "2A0B5C010400095E2356012400090610A7CB1ACB1B38043630180236312B10F0C9"
    1005 LET a$=""
    1010 READ ... 2022 LET usr=FN x(a$)
    2023 PRINT "usr",usr
    mattsteel mattsteel September 2011 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 ... the same as PRINT USR 0, LET a=USR 0, etc, of ... 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 ...
    ewgf ewgf December 2008 Sinclair Miscellaneous
  • 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…

    ... thus ensuring that the USR call returns the required decimal ... the end, so that "USR nnnnn" can be used in ... to return from a USR call with a floating ... pointers to be returned from USR calls. Refer to the ... /> [code]
    9991 LET limit=1: LET tint=0: REM any ...
    Battle Bunny Battle Bunny January 2017 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
  • Funniest Speccy related memoryOkay, there maybe won't be that many, but I have a couple that might conjour up some jolly jape memories. 1. Walking home from school with mate one …

    ... crash. Mate: "C'mon stop, let us have a look at ... him that ran a RANDOMISE USR 2143 (or whatever it was ...
    Vampyre Vampyre October 2002 Games
  • Random Smiley FacesAs promised, here's the Syntax: ;Startup 5 CLS 7 PAPER 0: BORDER 0 ;Graphics 10 FOR n=0 to 7 20 READ row: POKE USR "P"+n,row 30 NEXT n 31 DATA BI…

    ...
    20 READ row: POKE USR "P"+n,row
    30 ... /> ; Random Numbers

    40 LET INKY = 1+INT ( RND* 7 ... )
    50 LET X = 1+INT ( RND* 30 ... )
    60 LET Y = 1+INT ( RND* 20 ...
    Takashi64 Takashi64 January 2003 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
  • Let a=val "1"I see some basic programs which use Let a=val "1" instead of let a=1 syntax. what is the difference between val "1" and 1? is it an effect of some …

    I see some basic programs which use Let a=val "1" instead of let a=1 syntax.

    what is the difference between val "1" and 1?

    is it an effect of some compiler or converter?

    just curious.
    Arda Arda April 2003 Sinclair Basic
  • 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
  • An intriguing question...Well, intriguing for me anyway. As we all know, when calling a Machine Code function from BASIC, we use the USR (address) function. But for this to …

    ... from BASIC, we use the USR (address) function. But for this ... />
    RANDOMIZE USR xx
    PRINT USR xx
    LET a=USR xx
    monty.mole monty.mole June 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... 32768 and then type PRINT USR 32768 to run.

    DI ; because of SP, dont let this get messed up
    EX DE,HL ; Let DE now point to correct ...
    robpearmain robpearmain September 2004 Development
  • Most pointless type-in?I think it was one I saw, probably in Program Pitstop(which mag did that?), to evaluate a string as a full expression, a la the Beeb: spend hours typ…

    ... thing, then do a RANDOMIZE USR something to evaluate A$ and ... prefer, spend two seconds typing LET A=VAL A$, which does ...
    robert@fm robert@fm October 2004 Games
  • Odin & Thor - Please let's keep the good senseDear friends, I think it is useless to shoot out bad words against Paul McKenna. Let's keep the good sense and discuss this isseu wisely. Some say …

    ... bad words against Paul McKenna. Let's keep the good sense ... these games? Its a point. Let's accept it and hope ...
    phoenix phoenix March 2005 Sinclair Miscellaneous
  • George Lucas just won't let go, Yep he's thinking of making anotherYes good old George is thinking of making another Star Wars film set before episode 1, aparantly with Yoda as the central character, but laydees and …

    Yes good old George is thinking of making another Star Wars film set before episode 1, aparantly with Yoda as the central character, but laydees and gents he says it aint for the money. In the famous words of Vic Reeves " you just wouldn't let it lie "
    swordheart swordheart May 2005 Chit chat
  • '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
  • Amazing Short Type-InsHey all ! Been having some pretty stressfull days lately so I tought I would type in some games. There was a very nice type-in book here in Slovenia…

    ... : POKE USR "a"+f,t: NEXT f
    30 LET b$="8 ... : CLS
    40 LET x=10: LET y=19: LET a$=""
    50 ... FOR f=10 TO 19: LET a$=a$+"10"+STR$ f ... GO SUB 220
    70 LET z$=INKEY$: IF z$> ...
    Tom-Cat Tom-Cat March 2006 Games
  • 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
  • Let's Compute!Hi, I have been trying to find copies of the above magazine but can't find them anywhere. Can anyone help? I recently managed to pick up the whole …

    ... series of Input magazines but Let's Compute! seems somewhat rare ...
    Adam Ant Adam Ant April 2007 Sinclair Basic
  • Game OptimisationBelow is a section of code Im using for movement enermy display and collision detect. What happens is that you move the sight with ,.qa and space do…

    ... br /> 120 IF INKEY$="," THEN LET playerx=playerx-1: PRINT AT ... 00011000
    290 POKE USR "A"+1,BIN 00011000
    300 POKE USR "A"+2,BIN 00000000
    310 POKE USR "A"+3,BIN 11000011
    320 POKE USR "A"+4,BIN 11000011
    Toxitalk Toxitalk May 2007 Sinclair Basic
  • Blok*Load on Multiface 128Spinning this off into a new thread to avoid cluttering up the original: [url]http://www.worldofspectrum.org/forums/showthread.php?t=17999&page=7[/u…

    ... /> 40 CLEAR 32767
    50 LET t=0
    60 FOR ... POKE x,y
    90 LET t=t+y
    100 ... data": STOP
    120 RANDOMIZE USR 32768
    130 DATA 221 ...
    StuBruise StuBruise October 2007 Sinclair Miscellaneous
  • FATware on +divIDE and ZX SpinHello, My (real) +divIDE running FATware 0.12 was reading snapshots from a FAT (16) formatted CF card perfectly last week. Now, on reset, it recogn…

    ... HALTs the CPU until I let go of the NMI.
    USR), it now locks up rather ... advice you might have.
    Let me know if you need ...
    BloodBaz BloodBaz December 2007 Hardware
  • Will mile get laid this year? Let Cilla help outLots of sexual tension from the poor lad and lots of thread titles indicating a possible like for man on man love. Let's play the part of Cilla Blac…

    ... on man love.

    Let's play the part of ...
    IN31 IN31 February 2008 Chit chat
  • If you've got a real working MF128,IF1, and MDR combo can I ask a favour?So, if you do have a real Multiface 128, Interface 1, Microdrive and, oh yeah, a Spectrum (48k or 128k) that are all working, can I ask a favour...? …

    ... invoke with:
    ;
    ; PRINT USR 32768
    ;
    ; a result ... /> ;
    ; ... and if you have, let the forum know!
    ;
    jp jp February 2008 Hardware
  • problems using new TRD files within emulatorsDear folks! As you may know, I'm working on the TRD file support for my ZX-Modules programs. For validation - I need a good emulator that supports …

    ... using the command
    RANDOMIZE USR 15619: REM : SAVE "test" CODE ... works good, at first I let ZX-Blockeditor create empty image ...
    clausjahn clausjahn February 2008 Emulators
  • BASIC Keyword ReferenceRealised that the Sinclair Basic section would be a better place for discussion of BASIC keywords, so for reference the old thread is in [thread=2005…

    ... /> LEN : E : K USR : E : L
    LET : K : L VAL : E ...
    icabod icabod March 2008 Sinclair Basic
  • 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…

    ... ,129,193,225,251,201: LET z=33001: FOR j=z ... j: PRINT AT 0,6;USR 33001;AT 0,0;"score ...
    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
  • So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…

    ... the routine:
    LET A$="QH": PRINT USR adres;A$
    PRINT ... />
    The string after the USR holds the card to print ...
    LD SP,HL ; undo USR command
    LD HL,(23606 ...
    Dr BEEP Dr BEEP December 2008 Development
  • [BASin] Bug report and question[B]1. Bug report:[/B] BASIC Editor behavior I'm using a variable to store the contents of the BC register. But the BASIC editor works strangely. I t…

    ... ):

    [code]10 LET a=USR 32000
    20 PRINT a ... :

    [code]10 LET a=USR 32000
    2020 PRINT a ... :[/B] Other than typing "randomize usr 0" on the editor is ...
    rahtgaz rahtgaz January 2009 Emulators
  • 25 years with the SpectrumTo paraphrase JFK, ask not what your Spectrum can do for you, but what you can do for your Spectrum. Well I've done quite a bit since I joined the sc…

    ... project
    * Stopped many pointless 'Let's build a new Spectrum ... ROM from the 128 (RANDOMIZE USR 15364)
    * Nagging Garry Lancaster ...
    chev chev February 2009 Sinclair Miscellaneous
<1234567…34>

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