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  • 4164 refreshHi, I remember pondering the mystery of how 4164's seem to get properly refreshed when used as video memory, and half the answer has just popped up i…

    ... refresh and one needing a 256 (8 bit) cycle refresh.
    spodula spodula October 2011 Hardware
  • Find-Fill-Copy functions for BASICThere's not much going on here, so here's three m/code routines to provide some data manipulation functions which are otherwise slow to do from BASIC…

    ... ",fill) -or- FN f("z()","INT PI",fill)
    * [optionally copy ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • Arkanoid Hack - Your Sinclair Smash TipsRemember that Arkanoid hack in YS Smash Tips that didn't work? It does now... [CODE] 10 REM ARKANOID HACK 20 CLEAR 65535: LET C=1: LET D=23295 …

    Remember that Arkanoid hack in YS Smash Tips that didn't work? It does now...

    [CODE] 10 REM ARKANOID HACK
    20 CLEAR 65535: LET C=1: LET D=23295
    30 LET T=0: FOR N=1 TO 1E9: READ A: IF A>=0 AND A0 THEN RANDOMIZE 1256+USR 23296 ...
    jp jp October 2011 Development
  • Empire "Mega" PatchI've been posting [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0001619"]Empire[/URL] related bits and pieces [URL="http://www.worldofspectr…

    I've been posting [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0001619"]Empire[/URL] related bits and pieces [URL="http://www.worldofspectrum.org/forums/showthread.php?t=35727"]all[/URL] [URL="http://www.worldofspectrum.org/forums/showpost.php?p= ...
    jp jp November 2011 Development
  • Problem with a small basic routineDear all; I have been messing about with a routine (originally published in Your Computer 1982, by Tim Langdell). The idea of the program is to simul…

    ...
    40 LET V=R*INT(SQR((10*4) ? X*X ... ?R
    60 LET Z=INT (80+30*SIN((SQR(X ...
    Meurglys68 Meurglys68 November 2011 Sinclair Basic
  • Can someone shorten this line of BASIC for me?I think if Sinclair Basic had a modulo operation this line could be a lot shorter:[CODE]PRINT AT cy,cx; PAPER 7-((cx/2=INT (cx/2))*(cy/2=INT (cy/2)))…

    ... 7-((cx/2=INT (cx/2))*(cy/2=INT (cy/2)))-((cx ...
    bigjon bigjon January 2012 Sinclair Basic
  • RND CommandsExactly how random are they? Reason I ask is I'm using 4 of them to generate a random number, the value of which then assigns movement commands to f…

    ... RANDOMIZE
    930 LET k=INT (RND*8)
    940 LET ... l=INT (RND*8)
    950 LET ... m=INT (RND*8)
    960 LET ...
    Wookiee Wookiee January 2012 Sinclair Basic
  • SpecBAS 0.724 Now available!Hi folks - Again, a new SpecBAS for you. Some stunning bugs made their way into the last one, so I had to get a new version out sharpish. And for o…

    Hi folks -

    Again, a new SpecBAS for you. Some stunning bugs made their way into the last one, so I had to get a new version out sharpish. And for once, you windows folks are at the bleeding edge :)

    Anyhoo, new features are few ...
    Dunny Dunny January 2012 Sinclair Miscellaneous
  • Spectrum 48K - upper memory MIAI have recently acquired a ZX Spectrum which, according to the sticker on the bottom, should be a 48K model. It's an Issue 3 board, with upper memory…

    ... . PRINT PEEK 23732 + PEEK 23733 * 256 returns 32767. PRINT PEEK 23733 ...
    unholy unholy February 2012 Hardware
  • SIDBlaster/ZX - new soundcard for ZX-SpectrumThis soundcard is for ZX-Spectrum compatible computers. It uses in its work MOS Technology SID soundchip, which together with MOS Technology 6510 mic…

    ... ;
    - PAL & NTSC compatible (INT and CLOCK freq.);
    - Plays ...
    BYTEMAN BYTEMAN February 2012 Announcements
  • Generating a constant of 2?Hi Folks, Through "The Wizard of WOS" I learnt that you can generate constants as follows: [B]NOT PI=0 SGN PI=1 INT PI=3[/B] Is there a quick way …

    ...
    SGN PI=1
    INT PI=3[/B]

    INT PI-SGN PI[/B] which ...
    Paddy Coleman Paddy Coleman February 2012 Sinclair Basic
  • Pip The Pipistrelle[color=red]*COMING SOON*[/color] Pip The Pipistrelle I am going to put all the game details,instructions and story here now and simply update this t…

    ... water,sunset,stars,etc)
    256 food items with 19 of ...
    jammajup jammajup March 2012 Brand new software
  • The Sinclair ZX Microdrive Resurrection Project (long)Dear Spectrum fans! [Management summary: Download [url]http://www.bartheld.net/temp/mdv2img.zip[/url] and tell me what you think. All help very much…

    ... /> }; // enum tPolicies
    const unsigned int cPOLICIES=eFIX_DATA|eACCEPT_ERRORS|eOVERWRITE_OUTPUT; // only ...
    Volker Volker March 2012 Emulators
  • Chaosmongers has a big rant.Just received this Cronosoft related email today:....... [quote] >Hello, >I enjoy the idea of releasing new games for older platforms but... >I h…

    ... colours of the palette of 256. ZXSpin 0.7 is recommended ... colours of the palette of 256. ZXSpin 0.7 is recommended ...
    chaosmongers chaosmongers March 2012 Games
  • Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…

    ... "PRINT PEEK 23732 + PEEK 23733 * 256 (Enter)".
    Following the [url ...
    Asure Asure March 2012 Hardware
  • BUG in zxspin and SpecEmu - read Loading speed in WAV fileI'm created a new save, but it can run at 44.1 KHz, to test it, i make a new file from WAV 44.1 KHz to 88.2 KHz. Load this file in a emulator zx-spin…

    ... of 44,1 KHz, in 256 bytes have up to 1 ...
    Z80user Z80user March 2012 Emulators
  • In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…

    ... data types
    it supports: int (16 bit signed), short(16 ...
    Raydac Raydac March 2012 Development
  • Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…

    ... ...

    Let b= 1+ INT (RND*49): PRINT b
    landorb landorb March 2012 Sinclair Basic
  • those darned recursive functions againI've been stuck on this one all evening. I want to dump out some memory in binary to debug a program. I've got a simple mod 2 division loop to do tha…

    ... /> =s$+VAL$ (("FN b$(" + STR$ INT (n/2)
    + ",""" + STR$ (n ... -INT (n/2)*2) + """)" AND n)< ...
    Battle Bunny Battle Bunny March 2012 Sinclair Basic
  • BASIN and some nasty type-inI'm using BASin for the first time, and I'm trying to type a listing from a magazine. I'm trying to preserve EXACTLY as it is printed on the magazin…

    ... it was able to use INT and IN as var (not ...
    Zup Zup April 2012 Emulators
  • Help pleeease "Proving Emulator OpCode flags are correct"So I had a cunning plan... I wanted to write a test harness for Emulators that could "prove" that all opcode flags were correct. I wanted something m…

    ... /> 240 SAVE *"b" CODE 28672,256 // 7000h
    250 SAVE *"b ... " CODE 32768,256 // 8000h
    260 POKE aAddr ...
    Korinel Korinel April 2012 Emulators
  • Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …

    ... - (line * 16) - (cell * 32) - (row * 256) - (chunk * 2048)
    ld iy ... , 16384 + 6144 - (line * 16) - (cell * 256) - (row * 32) - (chunk * 2048)
    chev chev April 2012 Development
  • Decimals!Quick couple of (probably very silly) questions, folks... If I have an input command in a program asking "How many potatoes do you want to buy from …

    ... />
    I've used the INT function to produce whole numbers ...
    GreenCard GreenCard April 2012 Sinclair Basic
  • Store and restore attribute valuesI am needing ideas on how to write a machine code routine that will store/restore (more important to restore) attribute values to the 22528 area. I …

    ... 16,16 area of screen, 256 bytes I think?!

    daveysludge daveysludge May 2012 Development
  • What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…

    ... with 'ld hl,21+15*256'

    Anybody help ?

    ld hl,21+15*256 ; load hl pair with starting ...
    Saboteur Saboteur May 2012 Development
  • Spectrum 48K - upper memory problemsHi I have a ZX Spectrum 48K issue 3B which does not see upper memory. On PRINT PEEK 23732+256*PEEK 23733 i got result 32767. POKE 32768,85 and PRINT …

    ... .
    On PRINT PEEK 23732+256*PEEK 23733 i got result ...
    Edward Edward May 2012 Hardware
  • Raspberry Pi - fit into 48k Spectrum case?Hi all, New poster, here...long time lurker and Spectrum nerd. I've just got hold of a Pi from t'int for use with XBMC etc and did think about bui…

    ... of a Pi from t'int for use with XBMC etc ...
    JerzyBulovski JerzyBulovski May 2012 Sinclair Miscellaneous
  • Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…

    ... - ie. two tables of 256 bytes each placed on the ... start of a 256 byte page.

    ld h,SCRTABLE/256
    add a,(hl)
    ld h,SCRTABLE/256
    add a,(hl)
    Sokurah Sokurah June 2012 Development
  • CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…

    ... />
    ld h,c ; t = 256 * y
    ld l,b ... /> ld d,h ; c = t / 256

    ld (rnd+1 ... /> ld a,l ; x = t % 256
    cpl ; x = (b-1 ... . Having the table aligned to 256 byte boundary could be used ...
    Patrik Rak Patrik Rak June 2012 Development
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Latest Posts

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