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  • Routine for Currah speechI'm currently writing a routine for the Currah that will provide speech during a game. A timer is set to initiate the speech every 50 cycles of the …

    ... ;load count with 4
    Loop: ld a, (hl)
    ld ...
    dec de
    djnz Loop ;loop to load four bytes
    daveysludge daveysludge August 2013 Development
  • Rainbow Chaos(I so want to call this Law of Chaos to pun on lords) Anyway. Dunno if I'll make this. But if I don't /someone/ will want to. It's just too good an …

    ... counter flood makes a triad loop. Fire burns plants which soak ...
    Gedlion Gedlion August 2013 Development
  • MC LPRINT 23681Having problems with this routine to print large on the screen using LPRINT, it works ok in BASIC, but cant seem to get it to loop for some reason in…

    ... seem to get it to loop for some reason in MC ...
    ld b,7
    loop ld (23681),hl ;poke address ... hl ;increase hl
    djnz loop
    ret

    print ...
    daveysludge daveysludge September 2013 Development
  • Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…

    ... book and see there are timing figures associates with each instruction ...
    rune rune September 2013 Sinclair Miscellaneous
  • Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…

    ... Speccy goes into an infinite loop, etc.

    Of course ...
    memrah memrah September 2013 Sinclair Miscellaneous
  • JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …

    ... in a no-win infinite loop.

    Also, James has ...
    spider spider September 2013 Sinclair Miscellaneous
  • Use PLAY without the 128 ROMHere's a little thing I wrote called SoftPLAY: [url]http://www.worldofspectrum.org/forums/showthread.php?t=45259[/url] Now you can use the PLAY comm…

    ... ROM command in RAM. The timing values may be a little ...
    chev chev October 2013 Sinclair Basic
  • Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…

    ... to do a loop inside a loop: a loop decreasing the low ... byte inside a loop of decreasing the high ... br /> JR Z,loop_high
    loop:
    LD (HL),62 ; ... /> INC HL
    DJNZ loop
    loop_high:
    DEC ... C
    JP P,loop
    RET
    [/CODE ...
    Zerg Zerg October 2013 Development
  • Any HAM8x1 images to share?McLeod_IdeaFix's plug-in ULAplus supports the full ULAplus spec including Timex screens. SpecEmu emulates a machine with 48K timing, ULAplus, and Tim…

    ... emulates a machine with 48K timing, ULAplus, and Timex video modes ...
    chev chev October 2013 Sinclair Miscellaneous
  • Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…

    ... sp,SOURCE+4096-32
    loop:
    pop hl
    ... /> dec (hl)
    jr nz,loop
    ...
    counter_addr:
    ... bc,4096+128*256
    loop:
    REPT 32
    ENDR
    djnz loop[/CODE]

    The routine ...
    Einar Saukas Einar Saukas October 2013 Development
  • Horace & Spiders - HACK PACK needed (challenge)I... I.. am not sure about his, but perhaps there's a chance to make this happen: would it be possible to make Horace and the Psiders loop in a certa…

    ... make Horace and the Psiders loop in a certain spot?
    de Vandemar Croup de Vandemar Croup October 2013 Games
  • Troublesome routine, help needed!Having problems with this routine, it basically fires a rocket up the screen, but refuses to detect collisions. I'm using attribute blocks for detect…

    ... ,17 ;countdown from 17
    loop
    ld a,b ;load ...
    pop bc
    djnz loop
    ret
    print ld ...
    daveysludge daveysludge November 2013 Development
  • Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …

    ... udg data minus 32
    loop push bc
    ld b ...
    pop bc
    djnz loop
    ld b,32 ;hl ...
    daveysludge daveysludge November 2013 Development
  • Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…

    ... taking the remainder in each loop. This turned to be a ...
    mcleod_ideafix mcleod_ideafix November 2013 Development
  • A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…

    ...
    jr bucle ; closing the loop

    ; until end of ...
    Zup Zup December 2013 Development
  • SpecBAS 0.800 Released!Hi folks, it's that time again for another release. I was going to add a few more features, but I have other projects on the go at the moment, and it…

    ... the stack - GO SUB, DO .. LOOP, WHILE, UNTIL etc
    TEXTURE ...
    Dunny Dunny December 2013 Sinclair Basic
  • Can any C experts help me - have hit an impasseHere is an excerpt from my attempt to program a Bridge game in C. Can you spot where I'm goiing wrong? I am trying to count the points in each ha…

    ... the end of the j loop 5 lines up from the ...
    bigjon bigjon January 2014 Chit chat
  • DIM DATA and the likeSo...I'm trying to work out arrays in BASIC a bit more and have knocked up the following quick test bed to fiddle about with before trying anything m…

    ... to use a FOR....NEXT loop to READ a value but ...
    Wookiee Wookiee January 2014 Sinclair Basic
  • Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…

    ... I wrote a small basic loop to print the result of ... to 255 in an endless loop. It still works fine even ...
    Basher Basher January 2014 Hardware
  • What's the deal with hash tables, anyway?As there's nothing in the [url=http://www.users.globalnet.co.uk/~jg27paw4/pourri/0-surc-contents.htm]Compendium[/url] about hash tables, and as I've …

    ... collisions. It also does a timing comparison between selecting all 12 ...
    Battle Bunny Battle Bunny January 2014 Sinclair Basic
  • Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…

    ... smallest is an unrolled loop for multiplying two 8 ... ret

    ; general multiplication loop

    loop_11:
    < ... ret

    ; general multiplication loop

    loop_11:
    ... faster in the add loop. If I accept uniform ...
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Development
  • z80 less than and greater thanI am writing a keyboard routine where the pressed key code number is held in A. I only want to action the number key presses 1 to 9 (codes 49-57) so …

    ... compares in the key checking loop. I need to do " ... ? Would it be jp p,loop ?

    The greater ... I do jp c,loop
    jp c,loop

    < ... complete code (if jp p,loop is right) would be
    jp c,loop
    key_checking ; each number ...
    Speccy_James Speccy_James February 2014 Development
  • Fuse for Mac OS X 1.1.1.1 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…

    ... (RZX files)
    [*] Fix sound loop when pausing emulator
    [*] Now ...
    Fred Fred February 2014 Emulators
  • GEDit syntax highlighting for Boriel's ZX BasicHi! I just tailored this syntax highlighting code and would like to share with he community. Suggestions are always welcome, though the file works w…

    ...
    ln
    load
    loop
    mod
    next
    pkersey pkersey February 2014 Development
  • New Game looking for artistsHey ya'll I've started on my second game, an Aztec themed shooter. I'm new-ish to the Z80 coding scene, but as you know you can only really learn th…

    ... 4-5 different stages you loop through for a bit of ...
    Atari_Jetman Atari_Jetman February 2014 Development
  • SpecBAS 0.802 Released!Hi folks - It's that time again when I release the latest round of features and bugfixes to SpecBAS :) New for this version are ZONEs which act ver…

    ... 't exit cleanly after a loop
    EXIT didn't clean ...
    Dunny Dunny February 2014 Sinclair Basic
  • Questions about Vortex Tracker II exported songsHi, I have been experimenting with Vortex Tracker II lately and have a couple of questions. By exporting the song to TAP format, a file is generated…

    ... /> CALL 27810
    EI
    LOOP:
    HALT
    CALL 27810 ... )
    RLA
    JR NC,LOOP
    RET
    [/CODE]
    Alessandro Grussu Alessandro Grussu March 2014 Development
  • Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …

    ... -16-channels-LWLA1016-Logic-Analyzer-Timing-State-Logic-Analyzer-16/632082674 ...
    The_Bert The_Bert March 2014 Chit chat
  • So our Spectrums are faster than modern computers at some things...According to John Carmack, anyway: [url]https://twitter.com/id_aa_carmack/status/193480622533120001[/url] who said: [quote="John Carmack"] I can se…

    ... artefacts, or are doing special timing tricks such as multicolour), and ...
    Winston Winston March 2014 Development
  • VT2 hobeta player?I am trying to build something with a hobeta with player exported from vortex tracker ii. I want to be able to run the file on a standard 128K. I am …

    ... /> call music
    ei
    loop: halt
    call music+5 ...
    jr loop

    music: insert "file ...
    micken micken April 2014 Development
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Latest Posts

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    John Elliott on April 21
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