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  • z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…

    ... popping from it. Static variables need fixed storage locations that ... for two different temp storage variables?
    [/quote]

    variables so that the minimum ... can allocate variables to the same memory space in order ...
    Alcoholics Anonymous Alcoholics Anonymous April 2017 Development
  • Flicker free animation in BASIC, is it possible ?With all my various noodlings in BASIC and indeed with my so far limited assembly​ I keep coming up with the same issue. How do you do animations wit…

    ... function to avoid printing the space.

    By the way ... $
    KEYBOARD ROUTINE AND ANIMATION VARIABLES
    ENEMY ROUTINE
    LOOP ...
    IvanBasic IvanBasic April 2017 BASIC
  • The trouble with good code isLots of times I've come here to ask for help and always got it pretty promptly. Which is wonderful and one of the reasons why I don't think there's a…

    ... works really well, uses less space and is just all around ... hand" watching the values of variables and expressions.

    I ... where you could watch memory, variables, execute code instruction by instruction ...
    Zup Zup May 2017 Chit chat
  • Why don't the variables print where I told them too?I wrote the following program to experiment with creating sounds using 3 notes of BEEP and having the ability to change the notes up or down one at a…

    ... how much space is available for storing the program and variables. Any ...
    GReW GReW May 2017 BASIC
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... all of those things into variables. If you are imagining a ... all doable but is the space or the time there for ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Sinclair Miscellaneous
  • endless runner project..So I'm thinking of writing a small tutorial series on writing games for the speccy in C, and figured that an endless runner would be an easy example …

    ... br />
    Pointers are variables that hold memory addresses. (Incidentally ... techniques (inline assembly, global variables...) anyway in order to have ... takes up permanent memory space and increases the size ... compiler knew to make space in a jump table ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Development
  • endless runner project..So I'm thinking of writing a small tutorial series on writing games for the speccy in C, and figured that an endless runner would be an easy example …

    ... , say, a full 64k memory space to be used without worrying ... to use unsigned types for variables whenever you can. The z80 ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Development
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... 're mostly just to save space, although they do slow down ... RUN doesn't CLEAR the variables is handy as well, so ... , as the comment in the variables notes file is insufficient to ...
    Battle Bunny Battle Bunny June 2017 Sinclair Basic
  • how do i get more udgs on the spectrum in basic?how do i get more udgs on the spectrum in basic? i know there r only supposed to be 21 but is there a way of getting more in basic? i know its doable…

    ... overwritten by the values of variables in your program, and the ... work out how much total space your extra UDGs will take ... have to POKE the system variables that point to the character ...
    textvoyage textvoyage August 2017 Development
  • ZX Spectrum Z80 Development Environment on WindowsHi Folks, Just wondering what the recommendation is for a ZX Spectrum Z80 Development environment on Windows? Getting fed up with hand coding Z80…

    ... parts of source code, local variables inside modules to hide from ... things due to small memory space and lack of disk. CP ...
    Alcoholics Anonymous Alcoholics Anonymous August 2017 Development
  • Go to, gosub or something different?I'm going to write an arcade game in basic. May compile it. In both basic and compiled basic would a goto or gosub be faster? Also if I stored …

    ... for the line#. The system variables NEWPPC/NSPPC can be POKEd ... variables it will be quicker, as it has its own reserved space ...
    Battle Bunny Battle Bunny August 2017 Sinclair Basic
  • Numeric arrays: floating point or integer?I've just started programming a game in Sinclair BASIC (see the thread 'UFO Defence Command' in game ideas, although I'm going to call it ZXCOM ;) ).…

    ... and one in the variable space in memory. If so, can ... you save more space again by defining the arrays ... LOAD "" DATA to populate the variables.
    Georgeo Georgeo September 2017 Sinclair Basic
  • Numeric arrays: floating point or integer?I've just started programming a game in Sinclair BASIC (see the thread 'UFO Defence Command' in game ideas, although I'm going to call it ZXCOM ;) ).…

    ... and one in the variable space in memory. If so, can ... you save more space again by defining the arrays ... LOAD "" DATA to populate the variables.[/quote]

    In a ... code; this will work because variables are saved along with the ...
    The_Bert The_Bert September 2017 Sinclair Basic
  • Hacking the ZX Spectrum 48K ROMHi Guys, I have modded my Speccy with a dual boot ROM loading on first bank the original ZX kernel and on the second bank an enhanced version. I h…

    ... the ROM is coded for space efficiency rather than being easy ... -ATTR and T-ATTR system variables; the flash, bright, paper and ...
    GReW GReW November 2017 Hardware
  • ZXBaremulator v2.0Hi all, I've released the new version of my ZX Spectrum bare-metal for Raspberry PI. The new features and the images can be found on my project si…

    ... there are a lot of variables to consider apart from the ... I get on screen after SPACE is pressed

    Here ... ]

    This is after space has been pressed and showing ...
    harriusherbartio harriusherbartio November 2017 Emulators
  • Why can't you make a BASIC program as big as you want?Let me rephrase that. Is it possible using BASIC to write a program that can be multi part? In other words one that can LOAD lets say a story, in se…

    ... to this:
    - Using variables to store the levels of ... erase BASIC lines (and relocate variables), so you can release ... MERGE at least you need space to store both programs, but ... with the same number, relocating variables). The same applies when doing ...
    Zup Zup January 2018 Updates
  • Why can't you make a BASIC program as big as you want?Let me rephrase that. Is it possible using BASIC to write a program that can be multi part? In other words one that can LOAD lets say a story, in se…

    MERGE will need space to be able to hold both programs at the same time (including variables, if not CLEARed beforehand), plus the longest line in the new program (which could be a variable definition (eg. a large array) rather than a line of BASIC).
    Battle Bunny Battle Bunny January 2018 Updates
  • Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…

    ... $)=""
    * initialise the variables in the FN space: LET a$=FN a ... & lengths into the FN space
    (9 bytes: letter + "$" + $0E ... to point to the FN space
    * copy the display file ...
    Battle Bunny Battle Bunny January 2018 Sinclair Basic
  • New Game: Astrosmash! ZXHello Spectrum fans! It's been a while. After a few months of health issues and larger projects getting put on the back-burner, I decided to work …

    ... the game. My nephews liked Space Escape. The pause after contacting ... a sum of 8-bit variables? Doing all the operations involved ...
    hikoki hikoki 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–…

    ... of the nirvana binary. That space is used by putting the ... from pietro bros). Many game variables will be up there. As ... and opted for overwriting system variables (saving the $5B5C var ... not saved to the system variables. Instead if something needs tracking ...
    Alcoholics Anonymous Alcoholics Anonymous February 2018 Development
  • 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…

    ... , that is)

    Free space is 65536 - USR 7962 = 65536 ... PROG-space for Hotspot Hillock is 11kb (in RAM), the variables VARS_space ...
    Battle Bunny Battle Bunny April 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 definitions in the program space, because your program is going ... 128K, since the additional memory space is not directly available to ... other bits of program code, variables, workspace etc.
    AndyC AndyC April 2018 Sinclair Basic
  • How to stop a flickering character erasure?I'm trying to figure out how to build a moving sprite. Eventually it will be made up of several UDG's. However its early days yet so I'm experimentin…

    ... /> -Let´s use a blank space to erase it, this is ... :

    1 "Set initial variables for coordinates"
    2 "Print ...
    IvanBasic IvanBasic May 2018 BASIC
  • 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…

    ... that would take too much space, so I'm only storing ... , registers, exx registers, fixed memory variables) and I'm down to ...
    Sol_HSA Sol_HSA December 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…

    ... that would take too much space, so I'm only storing ... , registers, exx registers, fixed memory variables) and I'm down to ...
    Hikaru Hikaru December 2018 Development
  • Bit of fun Part Two - CPU SwapFollowing on from [url="https://worldofspectrum.org/forums/discussion/56671/bit-of-fun-one-change-only/"]this topic[/url], I felt given the erm 'natu…

    ... isn't quite as efficient space wise, so they might not ... support integer, or double precision variables like on the TRS-80 ...
    JamesD JamesD February 2019 Hardware
  • 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…

    ... "crater" (this is, a character space); the explosion itself will be ... other "experiments" using LPRINT, managing variables accordingly to speed it up ... , and extended use of system variables... Hope I release it soon ...
    IvanBasic IvanBasic March 2019 Brand new software
  • Two different versions of Bruce Lee?There's a possible MIA here, I think. I sat down at lunchtime to play a bit of Bruce Lee and discovered that the version I'd downloaded from WOS (th…

    ... : A tiny bit of Basic space unless the game execution does ... 'state' of the Basic system variables I'd not like to ...
    spider spider April 2019 Games
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