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  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    ... future proofed 48k version 6A with some upgrades fitted.
    Has ... regulator.
    Lower and upper memory modules from... http://zx.zigg ...
    RSwipeCA RSwipeCA August 2016 Hardware
  • Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…

    ... easiest way of dealing with this issue? Push and Pop will help ... I allocate a peice of memory for temporary [varable] storage, say ...
    Tobo Tobo September 2016 Development
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... command directly to the screen memory.

    5 LET a ... into a different part of memory first then dump it to ... write this to without messing with the system variables or the ...
    ivanb303 ivanb303 September 2016 Sinclair Basic
  • Ordered tapes and memory links.I did something a bit sad this evening... In the old days of Spectrum, I used to keep my tapes in those little plastic cases / racks from woolies.…

    ... gave them numbered labels (stay with me, I don't think ... , I get a very strong memory of the time and the ... in order to keep the memory link up:
    I went ...
    Luny Luny October 2016 Sinclair Miscellaneous
  • 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 …

    ... player choose to 'Attack' with one character and switch to ... will still
    attack with the Net or Tracker, this ... MEMORY.
    The 'Carry out an Action' routine doesn't PUSH ...
    [IMPROVEMENT] KILLING THE ANDROID WITH ANOTHER CHARACTER.
    If two ...
    Ersh Ersh October 2016 Announcements
  • Why do we have to live with colour clash on the Spectrum Next - if it ever gets sold!I can fully sympathize with those who would like to see a 'new' Spectrum, presumably modelled on the last and best version with perhaps the option to…

    I can fully sympathize with those who would like to ... the last and best version with perhaps the option to be ... have all the extras, more memory, more speed, SD card read ... equip a suitably camouflaged netbook with hard wired emulation so that ...
    mik3d3nch mik3d3nch November 2016 Chit chat
  • Contended Memory, literallyDoes anyone else have the sort of memory where they have trouble just picking out info cold? I know we had a discussion about memory sometime last mo…

    ... have the sort of memory where they have trouble ... we had a discussion about memory sometime last month, but...< ... and I'm pretty ok with an answer.
    Now ... Yes they both create new memory, but my brain wouldn' ... 's it, my association memory is broken. Its all ...
    Luny Luny December 2016 Chit chat
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... . could you help me out with some diagnosis.

    with a specmate cartridge that ... />
    so recently with my sons interest in it ... removed all the upper memory but the fault is ... between the 2 colours with occasional hints of a ...
    cypher007 cypher007 December 2016 Hardware
  • Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…

    ... Card with integrated diagnostics ROM, which failed the upper memory RAM ... Pokeing the next address with 85 and 170 however gave ... prior. Lows with modified 4164s and highs with regular 4164s. ... high to enable the upper memory and under which conditions? ...
    protek protek January 2017 Hardware
  • A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…

    ... wide. It uses no memory variables for storage of intermediate ... .

    It starts with HL holding the screen address ... needs to be aligned in memory with something like

    [ ... push bc ;store counter
    ld c,(hl) ;load C with first ...
    Ast_A_Moore Ast_A_Moore February 2017 Development
  • DIVMMC / DIVIDE and combination with next interfaces (compatibility)Very often we can read about problems of ports collision or incompatibility between devices. Here is way for identify devices compatible/usable with …

    ... can't combine more devices with extrenal memory on ZX bus. Then ... from table all other devices with external memory and also other IDE ... which contain only interfaces without memory, removed ports of some ... IDE ports. Only two memory based devices are on begin ...
    velesoft velesoft March 2017 Hardware
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... 5bits of 1st byte combined with a 2nd byte
    ... ;; ==============================================
    ;; uzxsclzf - uncompress char version with window
    ;; 116bytes long
    memory position to start the copy
    push hl ; ...
    TomD TomD April 2017 Development
  • 128k memory musingI've been pondering on the 128k memory thing a bit, and it's just bloody stupid. The 64k memory space is divided in four chunks. One is always los…

    ... stupid.

    The 64k memory space is divided in four ... be in the always-resident memory (the fixed 16k + the remaining ... they aren't contended) along with all the needed audio data ... (including stack.. unless stack is with the MCP) everything should be ...
    Sol_HSA Sol_HSA May 2017 Development
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... get my head around the memory contention issues of the ... best use of the extra memory. I've searched the ... I can understand that the memory is divided up into banks ... , as it is "contending" with the ULA for access to ... the ULA has priority. With this in mind I've ...
    adrian_singh adrian_singh May 2017 Development
  • z88dk sp1lib with fzxThe numbers dont seem to display properly? fzx by itself works [quote] // for targets supporting fzx // zcc +zx -vn -startup=31 -O3 -clib…

    ... output CLIB_STDIO_HEAP_SIZE = 0 // no memory needed to create file descriptors ... hash); // redefine graphic associated with space character
    sp1_TileEntry('B ...
    // check for collision with other sprites

    ...
    slenkar slenkar June 2017 Development
  • Key repeat weirdness with EI & IYI finally (after 35 years!) decided to write something a) for 48k speccy b) in z80 assembler. It's been over 20 years since I've written anything in …

    ... was a) the speccy screen memory layout and b) that z80 ... called populates a byte in memory with bits corresponding to QOAPSpace keys ... me whenever I'm mistaken with my assumptions):

    ... must have something to do with keyboard repeat.

    ...
    arttu arttu July 2017 Development
  • Thinking about my gameAnother long post, I'm afraid. Somewhere on this Forum is a short chunk of text I put up as a sample of what I'd like to turn into a text adventu…

    ... game, almost certainly written with Quill (despite my reservations ... as input or else fill half the memory with an enormous list ... of word choices. The trouble with ... book he could find with descriptions of these fledgling ...
    mik3d3nch mik3d3nch July 2017 Chit chat
  • what is wrong with this loop?here is the loop: ld b,12 ld a,31 ld de,right_screen_array right_screen_array_label call charaddress ex de,hl ;de now contains screen address…

    ... /> it is supposed to fill an 'array' with the addresses of the ...
    slenkar slenkar July 2017 Assembler
  • Chess games with demo ?With scrabble, I occasionally (the Sinclair Psion version as that seems nice enough) and its colourful, occasionally set it to play itself with a fe…

    With scrabble, I occasionally (the Sinclair ... set it to play itself with a few players just to ... Sinclair Chess offered this but memory must be playing tricks on ...
    spider spider August 2017 Games
  • EmuZWin hackHi, i have update last version of brilliant EmuZWin writen by Vladimir Kladov to work with modern OSes and implement new tokens for builtin asm. P…

    ... by Vladimir Kladov to work with modern OSes and implement new ... .

    Plese, help me with testing on some modern Windows ... /> Set the current memory page to top memory. It's more clean ... .4.5.6 buttons and fill all the pages.

    DenisGrachev DenisGrachev September 2017 Emulators
  • Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …

    ... 8Kx8 SRAM, in parallel with the main memory so that it sits ... the Z80 reads from main memory, it might be possible to ... reduce the effect of memory contention considerably. Possibly with the addition of ...
    The_Bert The_Bert September 2017 Hardware
  • 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…

    ... so I started playing again with Spectrum stuff, especially programming.
    with BASIC using BASin because of ... graphic -> 2. put into memory -> 3. use it in ... something I can re-use with modifications that should be fine ...
    sfg sfg November 2017 Development
  • 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…

    ... is the collumn number
    push bc
    ld bc,32 ... return from subroutines in assembly with a return value. Ie
    memory.
    ivanb303 ivanb303 November 2017 Development
  • Saving a program to tape with the assembler as well.Hi What I'm trying to do is save a program to a tape file with the McGrawHill Assembler in the high memory so that I can then run the program and r…

    ... tape file with the McGrawHill Assembler in the high memory so that ...
    ivanb303 ivanb303 December 2017 Development
  • Buggy/Rover magazine articleI had no sensible idea which forum seemed best to post this, so figured 'Misc' would be the best choice. There was in Sinclair User (unless memory…

    ... User (unless memory deceives me, possibly Your Spectrum at a push) a ... "its possible to assemble it with a knitting needle over a ...
    spider spider January 2018 Sinclair Miscellaneous
  • 1st steps in animation Having finally resurrected my familiar old graphics programs, chief amongst which is DPaint Animation, I was a little taken aback to reali…

    ... aback to realize that my memory had played tricks on me ... difference in photographic quality achievable with a Brownie 127 using ... for example. If your graduated fill is biased from left (dark ... is suggested by the graduated fill.

    I like ...
    mik3d3nch mik3d3nch April 2018 Chit chat
  • Prportional Ascii text scrollerA couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere y…

    ... you point it to in memory, with the possibility to auto repeat ... ,(hl) ;counter into C
    push hl ;save HL
    print ...
    Arkannoyed Arkannoyed August 2018 Development
  • Games with small sprites?Hey everyone, Can you recommend some games with nice 8x8 or 16x16 size sprites? I'm working on an artwork for my kitchen wall, I'm using ZX Spec…

    ... /> Can you recommend some games with nice 8x8 or 16x16 size ... trouble finding smaller sprites to fill in the gaps.
    they ...
    FadgePlaysGames FadgePlaysGames November 2018 Games
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