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<1…14151617181920…34>
  • Graphics questionHello. I was wondering, does anybody here know of a method to display a large (as in, the better part of the screen) bitmap/raster image using ZX Sp…

    ... contiguous area of memory as though it was a string variable.
    [*]Use it:
    .... LET a$=string expression
    .... LET stringvariable=a ... /> [/list]

    With caution, string functions and slicing can be ...
    Battle Bunny Battle Bunny December 2013 Sinclair Basic
  • Writing faster BASICIn terms of structuring BASIC programs, what are the best ways allocate variables, functions, arrays? Any tips. I remember INPUT mag had some suggest…

    ... that's gone. The t$ string is now just a simple ... processing via a DEF FN string parameter.

    I've ... start assembling and poking into memory quicker, which is reassuring in ... stuck. It is wasteful on memory to store the program in ...
    dmsmith dmsmith January 2014 Sinclair Basic
  • Code analysis on SNA filesI was wondering if anybody has attempted to convert all TZX/TAP files into SNA files? I would prefer SNA files as they're easy to use and search from…

    ... blanked out the copyright/version string. Even more blanking has been ... on the speccy due to memory constraints!
    m1k3yboi m1k3yboi January 2014 Development
  • Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …

    ... pre-calculated coordinates into a string array p$() with 2-byte ... them off with POP. The string array takes 5kb for 8 ... () & p$() arrays are in memory in the snapshot. In case ...
    Battle Bunny Battle Bunny January 2014 Development
  • Idiots Guide......To machine code, or assembler language...whatever the appropriate term is Basically at this stage I want to fiddle about and try and get used to…

    ... writing to a block of memory); modern compilers expend effort on ... viewvc/z88dk/z88dk/libsrc/_DEVELOPMENT/string/z80/"]z88dk tree[/URL] you ... 've got a bunch of memory here, you've got a ... asm_snprintf ; fill up the destination string

    ld hl,10 ...
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Development
  • Outputting debug trace to RS232 (assembly)Hi Guys, I'm working on a game at the moment (written in assembly) but I am really needing to write out a debug trace of what is going on with the p…

    ... but having to write a string of BASIC before doing the ... to a block of memory then do a memory snapshot save. It ...
    BloodBaz BloodBaz January 2014 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    [QUOTE=na_th_an;748830]Available memory is incredibly tight, so it' ... mark the end of each string. Instead of spaces, set bit ... to 31 appear inside a string, the corresponding diagram or word ... space at end of a string for instance). In paragraph above ...
    Einar Saukas Einar Saukas January 2014 Brand new software
  • Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…

    ... state_3:

    ; read a string of decimal digits

    memory allocation strategy called the buddy ... system that breaks memory into powers of 2 ... request from the allocator when memory becomes tight.

    ...
    Alcoholics Anonymous Alcoholics Anonymous February 2014 Hardware
  • quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…

    ... copies the attributes to high memory, then copies the segments back ... high memory.
    [*]Lines 15 & 16 change the string lengths ... select random segments in high memory and the attributes.
    ... .
    [/list]
    The string definition space in FN a ...
    Battle Bunny Battle Bunny February 2014 Sinclair Basic
  • 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…

    ... could get an "easy looking" string input. In the end I ... pay more in terms of memory which is why an fzx ... is out there with more memory, disk access, internet, etc, as ... these things allow memory constraints to be relaxed and ...
    Alcoholics Anonymous Alcoholics Anonymous March 2014 Brand new software
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... : 5.66 : 1.86
    STRING SORT : 31.369 : 14.02 ... : libc-2.18.so
    MEMORY INDEX : 2.542
    INTEGER ...
    Rephlex Rephlex April 2014 Chit chat
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... : 10.57 : 3.47
    STRING SORT : 34.972 : 15.63 ... -2.11.3.so
    MEMORY INDEX : 3.105
    INTEGER ...
    Rephlex Rephlex April 2014 Chit chat
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... 5.19 : 1.71
    STRING SORT : 30.028 : 13.42 ... C compiler :
    libc :
    MEMORY INDEX : 2.423
    INTEGER ... 5.18 : 1.70
    STRING SORT : 29.92 : 13.37 ...
    Zup Zup April 2014 Chit chat
  • Currah ?Speech channelIt seems to me that it would be nice to be able to send words to the ?Speech with PRINT #5;"Speak English to me, Jimmy" or some such. There really i…

    ... z88dk that can send a string to the microspeech directly. I ... these words would be quite memory intensive.
    Timmy Timmy June 2014 Development
  • Currah ?Speech channelIt seems to me that it would be nice to be able to send words to the ?Speech with PRINT #5;"Speak English to me, Jimmy" or some such. There really i…

    ... . This routine writes a C string into basic's s$ and ... to be left untouched in memory. You need to lower RAMTOP ...
    Alcoholics Anonymous Alcoholics Anonymous June 2014 Development
  • Currah ?Speech channelIt seems to me that it would be nice to be able to send words to the ?Speech with PRINT #5;"Speak English to me, Jimmy" or some such. There really i…

    ... . This routine writes a C string into basic's s$ and ... to be left untouched in memory. You need to lower RAMTOP ...
    chev chev June 2014 Development
  • Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…

    ... string together IF ... THEN IF .... THEN IF ....

    Fix for memory ...
    Pobbit Pobbit June 2014 Sinclair Basic
  • Basic program malfunctionHello. Please does anyone know why this basic program 10 LET x=0 20 LET x=x+0.1 30 print x 40 if x<>1 then goto 20 50 STOP does not properly work o…

    ... a temporary string has got to involve moving memory upward to make ...
    Alcoholics Anonymous Alcoholics Anonymous June 2014 Sinclair Basic
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    ... br />
    When a string is being constructed from smaller ... of that construction in memory until it's finished ... WORKSP to the new string in VARS, and then ... reclaims the old string from VARS. All those ... giving an "Out of memory" error on that LET ...
    Battle Bunny Battle Bunny July 2014 Sinclair Basic
  • Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…

    ... a byte value directly into memory, so you'd use it ... sometimes constant values like your string.

    Defw does the ...
    AndyC AndyC September 2014 Development
  • Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…

    ... no, DEFM is not Define Memory and DEFS is not Define String.
    Gott Gott September 2014 Development
  • Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…

    ... will be replaced in Spectrum memory to 62,15
    ... ? ;)

    In Spectrum memory you can mix code and ... channel
    ld de,string ; address of string
    ld bc, ... ; print our string
    ret

    string defb 22,21 ...
    Ralf Ralf September 2014 Development
  • Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…

    ... therefore the length of the string he's printing, but why ... the relevant part of spectrum memory?

    ...I'm missing ...
    Tobo Tobo September 2014 Development
  • Help with Assembly - DEFB, etc.Dear all, I'm going through Jnathan Cauldwell's tutorial and find myself scratching my head at part I can't find a decent explanation of anywhere! E…

    ... therefore the length of the string he's printing, but why ... the relevant part of spectrum memory?

    ...I'm missing ... 30006 here - no output to memory
    [/CODE]

    EQU ...
    catmeows catmeows September 2014 Development
  • Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?

    ... to structure it such that memory usage is close to the ... pointer to where in the string you need to resume from ...
    AndyC AndyC October 2014 Development
  • Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…

    ... suitable location in un-contended memory.
    It's important ... correct position, and enter the string DEFW (define word), press CURSOR ... B]
    MEM - display free memory
    CLEAR - clear the ... current source code from memory
    BASIC - return to ...
    jp jp October 2014 Announcements
  • 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…

    ... and code 255 is only string terminator ?[/QUOTE]

    ... special code to terminate a string, you have to choose something ... extends to code 255 for memory reasons.

    Instead ... in z88dk which offers two string output routines:- one that uses ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Brand new software
  • 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…

    ... occupies 5 bytes in the string? This will maintain cross-platform ... s too general-purpose and memory-hungry. There are lots of ... toward things that relieve the memory issue like making it easier ... to use bankswitched memory and granting access to mass ...
    Alcoholics Anonymous Alcoholics Anonymous January 2015 Brand new software
  • ZXMAK2Hi everyone, I'm glad to present you the latest version of my emulator - ZXMAK2 :) There are a lot of changes were made since the last topic about t…

    ... device (no shared memory with CPU)? Is ... }

    public override string Description
    {
    get { ... br /> }

    public override string Description
    {
    get ...
    ZXMAK ZXMAK January 2015 Emulators
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