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<1234567…34>
  • Override AUTOLINE start?Hi there, Is there a poke that prevents a BASIC program from auto running, when it was previously saved with the LINE command? Cheers, Steve

    ... /> ; System variables:
    PROG equ $5c53 ; Start address of BASIC program area
    BASIC variables area
    ; ROM calls
    LD_BYTES ... start of the variables
    ld de, (PRG_LEN) ; area (if there are ...
    stefrobb stefrobb November 2010 Sinclair Basic
  • Removal of "reset on break" protection (old basic program)Hi, Long time lurker, here! This is hopefully quite simple but there's an old basic game in the I'd like to bring up to date / take a look at …

    ... d reccomend Boriel's ZX Basic http://www.boriel.com/ ... mode it will compile most BASIC programs without modification (except for ... machine code routines into the BASIC code however - they're ... to access and manipulate the BASIC variables area on the fly, which ...
    GReW GReW August 2015 Sinclair Basic
  • BASIC problem in SpectaculatorI have a piece of music written in +3 BASIC in spectaculator (using FOR LET, PLAY and NEXT) and when it auto loads (because of save "tune" LINE 10) i…

    ... of the start of the BASIC variables area, this could explain why the ... define one of the string variables that hold note data?
    GReW GReW March 2016 Emulators
  • Machine code and Basic system variablesSpectrum system variables (I mean 48KB model) are essential for Basic. But what if I started my machine code program and it's never going to return t…

    Spectrum system variables (I mean 48KB model) are essential for Basic. But what ... to return to Basic? Can I overwrite system variables area with my data ... the interrupt code uses system variables somehow.

    If I ...
    Ralf Ralf January 2009 Sinclair Basic
  • Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…

    ... /c routine to read some BASIC variables. So, before I start, I ... for the structure of how variables are stored in memory.
    variables.

    It works fine in 48K BASIC, but ... to work properly in 128K BASIC? (Again I'm working on ...
    Digital Prawn Digital Prawn March 2008 Development
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... loaded or saved using Spectrum BASIC. A self extract method is ... /> PROGRAM.BIN

    A BASIC listing can be displayed by ... the screen file last as BASIC will corrupt the display by ... space for the system variables and BASIC program area. The screen is left ...
    ASM ASM November 2010 Announcements
  • JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …

    ... it. A small piece of basic containing assembly to headerless load ... for myself after examining the basic itself I then decided to ... fake header to load the 'basic' at a higher address, and ...
    spider spider September 2013 Sinclair Miscellaneous
  • that "listing variables during runtime" thingWell, I did eventually finish this, but with my meds playing up I don't have much time each day that I can spend at the computer, so it's taken rathe…

    ... then think that the variables used by the listing ... /> Part the 1st - the BASIC variables lister BASIC listing:
    [url]http:// ... br /> * The main program variables are kept distinct from the ... listing routine variables by shifting (VARS) to ...
    Battle Bunny Battle Bunny November 2013 Sinclair Basic
  • ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…

    ... reader now recognizes the BASIC program and variables area, as well as RAMTOP ...
    clausjahn clausjahn August 2014 Emulators
  • TIL: something about floating point numbersHere's something that had me scratching my head for a while until I figured out what was going on. In a BASIC program, floating point numbers are …

    ... on.

    In a BASIC program, floating point numbers are ... program and then inspect the variables area, you see that "a" is ...
    SkoolKid SkoolKid June 2016 Sinclair Basic
  • 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…

    ... simply by checking whether the BASIC program area has moved or some ... checksum of the #3D2F~#3FFF area in 48 ROM.
    inc ...
    Hikaru Hikaru July 2016 Development
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    ... ) with 0 (see the system variables section below).

    ... br />
    ====================

    * General BASIC tips
    --------------------

    * Place ... contains various flags controlling the Basic system and generally should ...
    na_th_an na_th_an April 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…

    ... would in Basic.

    [code]
    // Attach C Variables to ... includes the IY register. Unfortunately, Basic assumes it has a monopoly ... got to do with the Basic system? Nothing usually, but ... to index into the system variables area. Now since I've gone ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... defining whether we started from BASIC or directly (so i know ... i safely "exit" to the basic editor?
    [/quote]

    basic in general expects you not ... used to index the system variables area) and HL' (for some reason ...
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Development
  • Speed of variables vs. POKE/PEEKGreetings, I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew …

    ... />
    So, If I have variables that are used intensively in ... links to simple steps for BASIC optimisation is much appreciated.[/ ... the top of the vars area. This is documented somewhere in ... on how the BASIC variables are stored in the basic program (see about ...
    BloodBaz BloodBaz March 2007 Sinclair Basic
  • Speed of variables vs. POKE/PEEKGreetings, I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew …

    ... sounds. Numeric variables keep their position in the variables area so define ... at the end of the variables area and the original to ... at the end of the variables area and the original array to ... the fewest problems to the BASIC programmer but the maximum ...
    Geoff Geoff March 2007 Sinclair Basic
  • Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…

    ... the Printer Buffer and System Variables area, they are just not easily ... the average coder (i.e. BASIC programs).
    By dividing the ...
    rich_chandler rich_chandler March 2007 Hardware
  • List of POKEs and PEEKs/cool memory addressesI was wondering if there was a list of cool memory addresses to POKE and/or PEEK. For example, I know that PEEK 23674 tells you how long a Speccy has…

    The system variables area provides the most interesting ... area of memory.

    Full list of system variables ... worldofspectrum.org/ZXBasicManual/zxmanchap25.html]BASIC manual chapter 25[/url].< ... changing CHARS or UDG variables to point to a user ...
    BloodBaz BloodBaz April 2007 Sinclair Basic
  • A challenge thats probably impossiblehere's a challenge for all you coders. Given a snapshot, is it possible to create a program to sniff out the original start address for the game that…

    ... load game loader written in Basic, which then loads game machine ... Basic loader is stored (it is usually just after the system variables area ...
    Ralf Ralf June 2007 Development
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... purpose of these system variables, but I still don ... . The address yields the BASIC variables memory start address. So ... loaded ALONG WITH the BASIC, right after it. ... CODE above your own BASIC and then PEEK it ... , for example, the video area (starting at 16384) or ...
    Marcelo Marcelo August 2007 Sinclair Basic
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... these routines scans the VARS area, and does some unknown operations ... the values of some undetermined BASIC variables. I cannot coax the routines ...
    Digital Prawn Digital Prawn October 2007 Games
  • Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…

    ... made the pagination routine in BASIC yesterday, but it was way ... how to step through the variables area and how to pick out ...
    Digital Prawn Digital Prawn March 2008 Development
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... in the screen RAM pixel area would be visible to the ... , like the system variables area, the BASIC program area and the area of high RAM ... the way, onto the screen area).

    It does not ...
    Digital Prawn Digital Prawn January 2009 Games
  • TAP filesI'm trying to figure out how to make TAP files and am none the wiser. Tried downloading Taper, got it working but it was one of the unfathomables. I …

    The BASIC+variables and CODE have to be ... .

    PS.
    A BASIC program + CODE (+ UDGs + character set ... within program lines within the BASIC program area - eg. as had to ... be EDITed or LISTed from BASIC; so it simplifies the SAVE ...
    Battle Bunny Battle Bunny January 2009 Emulators
  • Machine code and Basic system variablesSpectrum system variables (I mean 48KB model) are essential for Basic. But what if I started my machine code program and it's never going to return t…

    ... system variables (I mean 48KB model) are essential for Basic. But ... to return to Basic? Can I overwrite system variables area with my data ... the interrupt code uses system variables somehow.

    If ... on any of the System Variables.

    You can ...
    rich_chandler rich_chandler January 2009 Sinclair Basic
  • 2 commands in 1 lineHi all, this is my first post although I have visited the web site many times, and I find it great. English is not my mother tongue, so I will try to…

    ... loads the screen, the BASIC and system variables area, and the game ... that before it the system/BASIC variables have been made pointing ... control is returned back to BASIC it gets the RANDOMIZE ... data block, poke the BASIC/system variables to skip the RANDOMIZE ...
    rinconete rinconete March 2009 Sinclair Basic
  • +3 how to detect if a file exist ?Need help. I am making a generic menu to my compilations over the spectrum +3. Exist some way programatically to detect if some file exists on the d…

    ... . It references the DEFADD system variables area to get the file name ... /code to search for variables in the VARS area and select an ... string arrays defined outside of BASIC has been covered in another ...
    Battle Bunny Battle Bunny June 2010 Sinclair Basic
  • Location of variableHi everyone When basic makes an array how to you find out the location in the ram of where the data is stored. :) Also, does it store the values in…

    ... BASIC and naturally is making use of BASIC variables whist parsing the VARS area ... of BASIC. As BASIC variables are created ... VARS area.

    I believe, as you update variables in ZX BASIC ...
    BloodBaz BloodBaz September 2010 Sinclair Basic
<1234567…34>

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