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<1…22232425262728…34>
  • Can't Get My Simple Code To RunHello again, I'm trying to run the following simple code: [code] org 32768 main ld b, 21 ; x coordinate is …

    ... ="Scorpion_Realities;923737"]Also what does memory location 23612 point to?[/quote ... )

    It's a variable TV_FLAG
    bit 0 set ...
    Scorpion_Realities Scorpion_Realities October 2017 Development
  • Spectrum +2 grey ear mod?Is it possible to turn the sound port on the back of a grey Spectrum +2 into an ear input? I know it's possible for the black +2 but I can't find muc…

    ... ) only providing 1k bytes, the memory provided by this chip is ... of upper RAM in the memory map must not respond to ... of upper RAM in the memory map. Yes, it's complex ... first. There is a system variable that you can POKE a ...
    1024MAK 1024MAK November 2017 Hardware
  • Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…

    ... than storing them somewhere in memory.[/quote]

    Just ... , for that matter), a variable is a rather abstract concept ... processor die, not in external memory ICs.

    ... assembly to refer to particular memory locations in RAM, registers ...
    Ast_A_Moore Ast_A_Moore November 2017 Development
  • Help with adding graphicsHi, After like 20 years or so I started playing again with Spectrum stuff, especially programming. I tried to dig into machine code, but apart f…

    ... assembler and assemble it to memory before running the game. After ... 2D arrays.
    The speed variable is slightly different than in ...
    sfg sfg December 2017 Development
  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…

    ... you just alter the System Variable that points to the UDGs ... you've filled the entire memory with your BASIC already!! :))
    Arkannoyed Arkannoyed December 2017 Sinclair Basic
  • Christmas games/memories...So, with Christmas fast approaching, what games remind you of Christmases of old? Horace Goes Skiing/Horace and the Spiders are the first that spr…

    ... />
    My main Spectrum Christmas memory comes, not from games (about ... were the usual (although slightly variable, it seems) Starter Pack. We ...
    EMarkM EMarkM December 2017 Games
  • Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…

    ... allocated in memory. So when BASIC searches for a variable, it finds ... quickest. If you define a variable later in the code where ... time it takes to allocate memory for the variable.
    JamesD JamesD January 2018 Sinclair Basic
  • Gandalf [z88dk][Nirvana Plus][128Kb]Gandalf 1.00 [url="https://drive.google.com/open?id=1T9HK0_isoMrfogSIJVhPGehjVIdFus4c"]Download Ver 1.00[/url] Long after the destruction of t…

    ... "I" register points into contended memory, snow will appear on the ... "I" register points into contended memory and code is executing in ... by the nirvana display update) - (variable amount taken by AY routine ... because it takes away a variable amount of time before ...
    Alcoholics Anonymous Alcoholics Anonymous February 2018 Brand new software
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... variables are very low in memory, not at $F72C.
    ... it's out of contended memory (the beeper effects are ... they ran out of memory and opted for overwriting ... leave a lump of memory unused if basic and ... s allocated to a regular variable that can be placed ...
    Alcoholics Anonymous Alcoholics Anonymous February 2018 Development
  • Gandalf [z88dk][Nirvana Plus][128Kb]Gandalf 1.00 [url="https://drive.google.com/open?id=1T9HK0_isoMrfogSIJVhPGehjVIdFus4c"]Download Ver 1.00[/url] Long after the destruction of t…

    ... />
    And variable _GLOBAL_ZX_PORT_7FFD should be in very low memory according to ... the memory map (section data_arch ... using an out of sync memory map.
    That will be ...
    Alcoholics Anonymous Alcoholics Anonymous February 2018 Brand new software
  • Alternative to Poke 23659,0 to prevent a 'break in' to a Basic Program.Good morning everyone, My memory fails me these days but in the early days of programming I used to use Poke 23659,0 as a crude way of offering so…

    ... stuck in the long term memory.

    IIRC you couldn ... :

    [quote]This system variable contains the number of lines ...
    spider spider March 2018 Sinclair Basic
  • Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…

    ... the string in SPARE2 system variable at 23728 $5CB0 for example ... 128K only and use paged memory to store your data.
    dbolli dbolli March 2018 Sinclair Basic
  • Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…

    ... ) as shown in the Spectrum memory map on manual page 121 ... ) DATA string. (RESTORE points system variable DATADD to the byte before ...
    Battle Bunny Battle Bunny April 2018 Sinclair Basic
  • ALIEN (Mindgames) Bugfix and Improvement.[code]ALIEN (Mindgames) [ZX SPECTRUM] BUGFIX & IMPROVEMENT by Ersh 2016-10-29 The following bugs are fixed: [BUG] INVENTORY BUG WHEN SWITCHING …

    ... GENERATOR USED DATA BEYOND INTENDED MEMORY.
    The Random ... Generator stepped through the entire memory instead of being

    [BUGFIX] THE MESSAGE VARIABLE WAS NOT RESET ON RESTART ... GENERATOR USED DATA BEYOND INTENDED MEMORY.
    [BUGFIX] A ...
    Ersh Ersh April 2018 Announcements
  • is there a way of reading characters off the screen and turning that into a string? this has to be done in basic. i know it would have something to do with peeking memory (maybe screen memory) but would this change due to programs r…

    ... send output to a variable or location in memory. (Reading the disk ...
    guesser guesser May 2018 Development
  • how do i read the screen in sections. with or without the scroll command?heres what i have so far http://pasteall.org/pic/efccc10f2f796d382dabb21ad76c640a https://www.pastefile.com/V7demX i want to store the cat l…

    As I posted on the other thread, extended channels for sending output to a variable or memory location are built in to the +3e ROM, which the OP is targeting.
    guesser guesser May 2018 Development
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... instead of declaring a new variable to store the original stack ... the SP register from a memory location is a very slow ...
    Ast_A_Moore Ast_A_Moore November 2018 Development
  • Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…

    ... (ix) = bd 5 -> local memory variable
    ; -3(ix) -4(ix ... (ix) = i 2 -> local memory variable
    ; -9(ix) = pixofs 11 ...
    Sol_HSA Sol_HSA December 2018 Development
  • procedural generationhi, is it possible for basic to program itself? i.e with a few pokes, as i know there are no commands for this.

    ... BASIC tokens into memory somewhere, then setting a system variable (or six ...
    Dunny Dunny December 2018 Development
  • Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…

    ... $ at the bottom of the variable area, LET i$(TO)=... maintains ... the variable at the top, much quicker ... , etc. is exclusively for saving memory just in those lines in ... variables area or VARS system variable.

    Let me share ...
    IvanBasic IvanBasic April 2019 Brand new software
  • Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…

    ... preserve the position of the variable i$ in the vars area ... LET i$="..." would put this variable at the end of variables ... , etc. is exclusively for saving memory just in those lines in ... I use a single string variable then I don't need ...
    patters patters April 2019 Brand new software
  • Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…

    ... byte counts in BASIC, for memory. In this case, both ... For sure NOT PI saves memory respect to the use of ... I use a single string variable then I don't ... 150 characters. This saves memory and prints the string a ... data as an array saves memory since the DATA can ...
    IvanBasic IvanBasic April 2019 Brand new software
  • Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…

    ... around 150 characters. This saves memory and prints the string a ... the screen using a string variable is workable for my game ...
    patters patters April 2019 Brand new software
  • is there a way of bypassing the rom and having 64 columns mode running all the time?i have tried various 64 column print routines but none of them seem to do this. i would like it to do 64 column mode for listings, typing, editing, p…

    ... simply changed the CHARS system variable to point to one or ... but that was just for memory saving.

    remember if ...
    SKR SKR April 2019 Development
  • Artillery - projectile motion gameI started writing this around 25 years ago and abandoned it due to performance issues, and a lack of physics knowledge. Bandersnatch on Netflix fille…

    ... the order in which each variable is more frequently used in ... they stay at the same memory allocation, or do they get ...
    patters patters April 2019 Brand new software
  • Spectrum USB KeyboardI know you can buy these but how do you make one . What I am thinking of be similar to the type described in Issue 1352 of Micro Mart at page 45 .The…

    ... .On Second go a "Poke Memory address box" came up . I ... of kit is more "firmware variable" that I thought at first ...
    harriusherbartio harriusherbartio August 2019 Hardware
  • How much can you get into 48k?Todays experiment was to see how long, how much text, a PRINT statement will hold. I filled it up with * and counted them and got 689 chrs. Almost 22…

    ... Besides I'll need some memory for other stuff, the ... the new font will take memory space too.

    memory. You have the actual ... it has to allocate variable space again for the ... and can be wiped from memory easily, you need to ...
    dmsmith dmsmith August 2019 BASIC
  • How much can you get into 48k?Todays experiment was to see how long, how much text, a PRINT statement will hold. I filled it up with * and counted them and got 689 chrs. Almost 22…

    ... />
    But its worth remembering variable storage, particularly numerical arrays can ... up a good bit of memory. For instance if you dimension ... , you'll be out of memory right away, because each of ...
    dmsmith dmsmith August 2019 BASIC
<1…22232425262728…34>

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