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  • BLOG- ZXSporgBasic RPG development thread- Inspired by the Spectrum 30 show, and after a six-month wait while I was busy playing loads of gigs, I have decided to do a spot of Spectrum coding…

    ... colour the PC can walk over. Line 9720 is now a ... with [I]INK 1+6*(VAL t$(5)=1)*((j=7)+(j ...
    bigjon bigjon December 2013 Sinclair Basic
  • hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…

    ... "MOVE", "NEW", "NEXT", "OPEN#", "OUT", "OVER", "PAPER",
    "PAUSE", "PLOT", "POKE ... "ACS", "AND", "ASN", "ATN", "ATTR", "CHR$", "CODE", "COS", "EXP", "FN", "INKEY ... char tab[] = {
    1,1,70,1,1,47,76,0,1,0,76,0 ... 76,76,76,70,1,76,1,0,1,1,0,76,0,
    Kweepa Kweepa January 2014 Development
  • hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…

    ... ", "NEW", "NEXT", "OPEN#", "OUT", "OVER", "PAPER",
    "PAUSE", "PLOT", "POKE ... ACS", "AND", "ASN", "ATN", "ATTR", "CHR$", "CODE", "COS", "EXP", "FN", " ... {
    1,70,4,61,1,42,70,0,1,0,76 ... unsigned char b = pear_hash(1, key);
    unsigned char ...
    Kweepa Kweepa January 2014 Development
  • How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…

    ... AT command
    defb 1,1 ;co-ordinates
    defb ... command
    defb 32 ;CHR$ 'space'[/code]
    ... it
    [22 = AT, 1,1 = row & column]

    Then 1 byte for the character itself ... paper, flash, bright, inverse, over?

    Do I ...
    Speccy_James Speccy_James February 2014 Development
  • reversing an LFSRWhat's the correct way of reversing an LFSR so that it produces the same numbers but in reverse order? The little BASIC program below shows a test I …

    ... , forward and reverse, with Xs over the tapped values.

    X X XX
    1 1010 0010 0100 = 1a24
    X XX X
    1 1010 0010 0100 = 1a24
    1)=0: LET x(2)=1: LET x(3 ...
    40 LET a$=CHR$ (48+x(1+VAL a$(13)+VAL ...
    Kweepa Kweepa February 2014 Development
  • 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…

    ... it a full 16x192 per chr$ giving 2 bytes width x ... 192 bytes height x 224 chr$ + 224x5 byte for the table ... with a font that's over 4K in size, but ideally ... keep fonts down to about 1.5K. RAM is probably going ...
    chev chev April 2014 Brand new software
  • UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…

    ... know why you'd print chr$ to get the UDGs when ... readable. The advantage with this over UDGs is that SCREEN$ will ... counter as the '0' rolls over into '1', then '2', etc. and ... to the screen address and 1 to the UDG address and ...
    joefish joefish 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. …

    ... $
    +CHR$ 22+CHR$ w+CHR$ v+CHR$ 19+CHR$ bf+CHR$ 17+CHR$ sp+CHR$ 16+CHR$ si ... needs the final length all over again, then it copies the ... statement would need 224 + 224+1 + 224+2 + 224+3 + ... 224 ... ]
    That needs old 10 +1+2+3+4+5+6 ...
    Battle Bunny Battle Bunny July 2014 Sinclair Basic
  • analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …

    ... (a+1)+256*PEEK (a+2)):
    PRINT CHR$ b0;")" ... 8946 PRINT CHR$ b0;: LET a=a+1:
    GO ...
    inc hl ;skip over counter
    inc hl ... hl
    ld (hl),1
    inc hl
    ...
    Battle Bunny Battle Bunny July 2014 Sinclair Basic
  • BLOG- ZXSporgBasic RPG development thread- Inspired by the Spectrum 30 show, and after a six-month wait while I was busy playing loads of gigs, I have decided to do a spot of Spectrum coding…

    ... 0 and a door to 1 in the maze map to ... plot as INVERSE 0 or 1 when I draw the map ...
    bigjon bigjon September 2014 Sinclair Basic
  • Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…

    ... -byte element of p$() hold CHR$ 16 (INK print control) ... LET g$(i,1)=CHR$ 0: LET bc=((i-1)*32)+USR InitG ... inc hl ;start p$() at 1,1,2
    LoopG2: ld a ... /> add hl,bc ;skip over 2-dimensional header
    ret ...
    Battle Bunny Battle Bunny October 2014 Sinclair Basic
  • Scrolling in BASICI remember a few BASIC typeins for other machines that claimed to be scrolling the screen. Obviously vertically its not too difficult - once you dis…

    ... then print some sprite-characters over it, just before rendering to ... 96 defined characters, and including CHR$ codes of 0-31 in ... , instead of having to type CHR$(1) ), leaving you with 64 characters ... would you prefer to use CHR$ codes as controls and have ...
    joefish joefish March 2015 Sinclair Miscellaneous
  • im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…

    ... from Facebook ...

    1. The PAPER colour for the ... set by the last two CHR$ in b$ (line 1009). ... of one trace with cyan over green you'd have ... a top trace with cyan over green and a bottom ... trace with green over cyan (or whatever colours you ...
    Battle Bunny Battle Bunny June 2017 Sinclair Basic
  • Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…

    ... /> ;Public release version 1.1
    ;Internal version 1.5.2
    ... equ %00111001 ;PAPER 7,INK 1

    call ... ,a ;load L with chr code
    add hl ... add hl,bc ;bitmap (chr code*8+font addr - 256 ... ;does x coord go over 255? No? Continue on ...
    Ast_A_Moore Ast_A_Moore 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…

    ... a SPACE for zero, 1-9 are 1-9, 0 is 10 ... you can just use CHR$(0) to CHR$(31) if you prefer ... have control codes to skip over a character space '.', and start ... warning - I make positions 0,1,2,3 off the top ...
    joefish joefish April 2019 Brand new software
  • (Fixing) The Swordsman of Kraxis 7The Swordsman of Kraxis 7 ([url="https://worldofspectrum.org/software?id=0013314"]link[/url]) is an arcade adventure, from a type-in book (in BASIC).…

    ... br />
    [code]
    1 REM *****THE SWORDSMAN OF KRAXIS ... 2,4: BEEP 3,1: GO TO 1
    900 GO ... /> 1610 DATA "ENTER IT",1,"EXAMINE IT",10
    1620 ... YOU:"
    1730 PRINT "1 ";H$(P)
    1740 PRINT ... br /> 1750 INPUT "ENTER 1 OR 2"
    1760 INPUT ...
    Timmy Timmy March 2021 Sinclair Basic
  • Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…

    ... for the experts to mull over.

    I've got ...

    LET assemble=1 (the 1 is irrelevant)

    I ...
    Chris Chris August 2001 Emulators
  • Keys in 48k mode for SpecEmu 1.2?Hello all, Does anyone know how to get the " symbol to appear when in 48k mode on Spec Emu 1.2? As you can imagine, it's pretty essential to be able…

    ... 48k mode on Spec Emu 1.2? As you can imagine ...
    David David July 2001 Emulators
  • spec chums should be friendsafter reading all the replies about cyborg i tried to post a reply but the thread was closed so i will post a new one...i thought cyborg (and alot of…

    ... his replies to the next 1,but surely we can all ... ,lets not criticise each other over a few questions and answers ...
    Andy Gurr Andy Gurr February 2002 Games
  • PSI ChessHi, Anybody out there remember the game "PSI Chess" by The Edge? Well, there seems to be no problem finding a snapshot ot tape image for this game …

    ... this game - they're all over the place. But: does anyone ... question is twofold:

    1) Is there something about the ...
    Ed Ed February 2002 Games
  • AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…

    ... - Selects the note
    1 Instrument Control - 1bit instrument on ... end previous effects 2bit null 1 byte instrument select - Selects ... - 4bit AY envelope waveform 1 byte coarse control - Selects ... rate 1byte depth - change tone over time linearly
    A ...
    cyborg cyborg October 2001 Sinclair Miscellaneous
  • Interface 1Hi, Just got myself an Interface 1 only to find it does not work. That is to say that I can't use any of the extended commands on it,e.g. CAT 1, LOA…

    ... /> Just got myself an Interface 1 only to find it does ... it,e.g. CAT 1, LOAD *"m";1;"example".....

    I ... Spectrum and not the interface 1?

    Thanks
    GazzaB GazzaB September 2001 Sinclair Miscellaneous
  • Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …

    ... value would be
    well over 10. Or is the increment ... of 1 taking the value of 128 ...
    Duxbuz Duxbuz August 2001 Sinclair Miscellaneous
  • 1 Box full of.....2 x ZX Spectrums (48k) Original Spectrum Manuals ZX Printer (plus 2 sealed rolls of paper) ZX Interface 2 (plus Jet Pac rom cartridge) Atari compatib…

    ... compatible joystick
    1 power supply
    1 set of Leads
    simon simon September 2001 Sales
  • Microdrive & Interface 1 For SaleAnybody out there want to give my old Interface 1 and Microdrive a good home. Any serious offers considered. I'm getting married this year and need t…

    ... to give my old Interface 1 and Microdrive a good home ... unfortunately the microdrive has a 1.5 cm scratch on the ...
    Martin Martin May 2001 Sales
  • Speccy Games for SaleI have the following Spectrum games for sale, all in original boxes, with original instructions: Elite (inc. Lenslok), Knight Lore, Alien 8, The Dam…

    ... Atac, Speed King 2, Formula 1 Simulator,Chequered Flag, 1985 The ... box).

    Best offer over ?25 for the lot
    Graeme Graeme May 2001 Sales
  • ZX48K boxed + interface-1 + microdrive for saleFree shipping (European buyers only). PayPal.com payment only. The box is in good shape, the pollys are in near mint condition, comes with rf lead, …

    ... , comes with rf lead, interface-1, microdrive (no cartridges), programing book ...
    interface1 interface1 March 2002 Sales
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