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<1…15161718192021…34>
  • saving part of a BASIC programHere's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to …

    Here's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to be combined or merged into other programs. It's sort of a slow version of copy & paste. The two line ...
    Battle Bunny Battle Bunny September 2011 Sinclair Basic
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... using B for a DJNZ loop).

    It should work ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... next character
    jp printline ; Loop round

    [/code]
    sack sack October 2011 Development
  • New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…

    ... to the interpreter's main loop - about 50% speed-up in ...
    Dunny Dunny November 2011 Sinclair Miscellaneous
  • DecompressorsYes another topic on the subject! I'm currently using MegaLZ [URL="http://lvd.nm.ru/MegaLZ/"]http://lvd.nm.ru/MegaLZ/[/URL] to decompress blocks on-…

    ... and JR's.... perhaps some loop unrolling....

    So from ...
    csmith csmith November 2011 Development
  • terminator & lotr o.s.t. themeaah - don't tell me it's not the same! 8) (allright, allright, it's just a simle loop, not any full themed remix or whatever, but for comparation, …

    aah - don't tell me it's not the same! 8)

    (allright, allright, it's just a simle loop, not any full themed remix or whatever, but for comparation, I believe, it does the job...)

    [youtube]l6xxcnxYm3A[/youtube]
    de Vandemar Croup de Vandemar Croup December 2011 Chit chat
  • Games that never end...?I'm not talking about games that loop back to the start once you get to a certain point, but games that cannot be 'completed' [url=http://www.worldo…

    I'm not talking about games that loop back to the start once you get to a certain point, but games that cannot be 'completed'

    [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0001601]Elite[/url] would be one

    any others
    def chris def chris December 2011 Games
  • Invalid combination of operands and opcodesIt says the error in the title, why is this?? [CODE] ORG 0000 LD HL, 63000 ;LOAD HL WITH STACK LOCATION LD SP, HL ;SET STACK POINTER TO HL LD A, …

    ... VALUE
    BIOS_DELAY_LOOP ;BIG DELAY LOOP TO SHOW SPLASH SCREEN
    JP MENU_KEYSCAN ;MENU LOOP
    ;END OF MENU LOOP
    ;===============================================================================================

    Robin Robin December 2011 Sinclair Miscellaneous
  • ZX-7 instruction (BEEPER 8-channels editor)ZX7 was the most powerful ZX Spectrum 48K music editor end engine since 1988 to 2011 (when OCTODE appeared). [url]http://www.worldofspectrum.org/inf…

    ... ]

    ZX7 doesn't loop its songs. It can be ...
    Mister Beep Mister Beep December 2011 Development
  • Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…

    ... can be made in a loop to arbitrary variables which aren ... operations to them in a loop managed by a DATA statement ...
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • problem with RND (or maybe INT)I'm using this statement: LET m=(INT (RND*sn)+k1)*k2-k1 to give a pointer m to a 2-byte segment of a string l$. Items k1 & k2 are integer constants…

    ... this statement in a continuous loop:

    FOR p=k0 ...
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • A 30th Anniversary ProjectHappy new year (belatedly...) So with the 30th anniversary approaching, I've decided to do a hardware project to celebrate it. Something hands-on (o…

    ... (so isn't reliable for timing, at least without making things ...
    Winston Winston January 2012 Hardware
  • Undefine functionHere's a routine to selectively remove variables from the VARS area and reclaim the space. This can be done partially from BASIC already by assigning…

    ... variables, using a DATA...READ loop or taking the names from ...
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how easy it actually is. (Actually I've already published this one some time ago, but this time the source is ...
    Timmy Timmy January 2012 Development
  • Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…

    ...
    ld hl, 55000
    loop ld a,(hl)
    ld ...
    inc hl
    djnz loop
    ret[/I]

    daveysludge daveysludge January 2012 Development
  • space optimisation algorithm neededScenario: * An adventure game consists of a series of locations, each of which may or may not have some text and/or graphics associated with it. * A…

    ... L would cause an indefinite loop, then increment the number of ...
    Battle Bunny Battle Bunny January 2012 Development
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... you probably remember is a timing faithful ZX Spectrum clone implemented ... the ULA, and all the timing quirks of the Spectrum ULA ...
    Winston Winston January 2012 Hardware
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... be a difference in the timing of the presentation of the ...
    Zorn Zorn February 2012 Hardware
  • probably simple C questionI haven't done any C for a while, so I'm probably making a simple mistake, but I can't see what's going wrong here. [code] FILE *fin = fopen("ff01di…

    ... 't go into the second loop to populate the "dist" array ...
    Battle Bunny Battle Bunny February 2012 Development
  • AYBABTU - musician neededALL YOUR BASE ARE BELONGS TO US For my new project [url]http://www.edisk.eu/en/download/73423/aybabtu.sna_128.03KB.html[/url] i am looking for AY m…

    ... :
    locked on 25Hz
    timing info:
    green - buffer clear ...
    Fikee Fikee February 2012 Development
  • Precisely timed loops in assemblyI'm looking for a way to make my code stop until the raster has reached the lower screen border (right after having drawn the last pixel line). I und…

    ... screen, and then create a loop to wait until it has ...
    na_th_an na_th_an February 2012 Development
  • Help needed with a loop counterVariable W counts to 12 then calls a subroutine to move a character, it then resets to zero and starts again. For every 2 moves of that character I …

    Variable W counts to 12 then calls a subroutine to move a character, it then resets to zero and starts again.

    For every 2 moves of that character I want to call another routine, but dont want to faff about with other variable counters.
    < ...
    daveysludge daveysludge February 2012 Sinclair Basic
  • AZIMUT / Frecuency spectrum[code]start DI LD HL,#7F40 LD D,#58 loop LD B,#00 bucle1 LD A,H IN A,[#FE] XOR A,C AND A,L J…

    ...
    LD D,#58
    loop LD B,#00
    bucle1 ... ]
    RRA
    JR C,loop
    EI
    RET[/code ...
    Z80user Z80user February 2012 Development
  • Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…

    This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/showthread.php?p=608777"]here[/URL]).

    [IMG]http://www.image-share.com/upload/1337/164.png[/IMG]< ...
    Timmy Timmy March 2012 Development
  • 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…

    ... a simple mod 2 division loop to do that and (much ... doing a mod 2 division loop, so the digits will come ...
    Battle Bunny Battle Bunny March 2012 Sinclair Basic
  • ASCII shoot'em-up. Work-in-progress video #1.I've posted up my first WIP video of the ASCII shoot'em-up game: [URL="http://www.facebook.com/bobs.stuff"]http://www.facebook.com/bobs.stuff[/URL] …

    ... levels, and is more about timing and maze navigation - with a ...
    bobs bobs April 2012 Development
  • Keyboard problem...Hi Folks, I have hit a problem in MRT and I cannot see how to get around it. Please allow me to explain. I have a list of items from which one can…

    ... because I want a small loop that updates the time on ... the INKEY$ statement in the loop above the code works fine ...
    Paddy Coleman Paddy Coleman April 2012 Sinclair Basic
  • Overflow Detection while Scanning a Number from a StringI've got some strange behaviour from a subroutine that reads a number from a string and converts it to a 32-bit long. It's C's strtol if it helps to…

    ... 32x8 multiply in the main loop. The loop does result=result*base ...
    Alcoholics Anonymous Alcoholics Anonymous April 2012 Development
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Latest Posts

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    John Elliott on April 21
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