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<1…11121314151617…34>
  • Hacking a game MAJIKAZOHello, I am trying to put a recent game called MAJIKAZO on disk. However, the loader is written for tape only, so I have to find a way how to rewrit…

    ... ; load address
    ld de,17 ; load length
    ld a ...
    ld a,255 ; data bytes
    scf
    call 1366 ... ; load data bytes
    jp 34304 ; run game ...
    Speccyman Speccyman June 2013 Development
  • IZX: a new standard format and driver for ZX-Spectrum icons[B]IZX[/B] is a very compact and efficient standard format to create icons for the ZX-Spectrum. You can download it from here: [LIST] [*][URL="http:…

    ... at address 55200 with 41 bytes:

    [CODE] 5 LET ... b=b+b+POINT (s*17+7,168-g*4-n ...
    Einar Saukas Einar Saukas July 2013 Brand new software
  • Full 16*16-digit BASIC multiplicationI liked Andre Adrian's 32-bit long multiplication routine so much that I decided to a decimal version. After all, 2^63 is only 9223372036854775808, a…

    ... ld (ix+42),17 ; 1070 LET A=17
    jp LM10_Start ... /> ;6 alternate registers (2 bytes, 0-9999)
    Ba: ... /> ;6 number registers (2 bytes, 0-9999)
    BB ... WORKSP+22
    ;16 bytes copy area
    COPY: ...
    Battle Bunny Battle Bunny July 2013 Sinclair Basic
  • How to get 720KB on Opus Discovery floppy (using PC drive)I upgraded an Opus Discovery yesterday with a PC drive, but I'm looking for the way to get a floppy formatted as 720KB. If I understand other topics…

    ... handling the fetching of 512 bytes sectors (1-9) all by ... sending out of 256 bytes sectors (0-17), or whatever layout the ...
    roko roko August 2013 Hardware
  • Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …

    ... . But timing of reading/writing bytes is full programmable. Speed of ... transfer on ZX128 is 17.3 kB(17727 bytes) per frame = 865 ... .6 kB(886350 bytes) per second = 4x faster than ...
    velesoft velesoft August 2013 Hardware
  • Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…

    ... 3
    1 * call SCROLL2x1 ; 17 3
    1 * call SCROLL2x1 ... ; 17 3
    1 * ei ; ... ; 20 1
    ;= 10006T =785 bytes
    [/code]

    As ...
    Battle Bunny Battle Bunny August 2013 Development
  • Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…

    ... first level to a 15000 bytes long file and saved it ... etc. ...]
    100 OUT 32765,17: LOAD "level1" CODE

    Alessandro Grussu Alessandro Grussu September 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... ; get register byte
    cp 17 ; check upper range
    jp ...
    chev chev October 2013 Development
  • IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…

    ... /> Entry format (13 bytes long):

    Bytes 0...7 - Filename (ASCII ... justified, space
    filled
    Bytes 6...10 - Type (ASCII) left ... justified, space filledd
    Bytes 11...12 - Size in kilobytes ...
    The_Bert The_Bert October 2013 Sinclair Basic
  • 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…

    ... , 96 ; fill 96*8=768 bytes per iteration
    ld e ... /> ; a call to PushFill 32 bytes of data (i.e. using ... ; 10t
    ret ; 10t => (17)+20+6 + (11*4+4 ...
    introspec introspec October 2013 Development
  • 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…

    ... , 96 ; fill 96*8=768 bytes per iteration
    ld e ... /> ; a call to PushFill 32 bytes of data (i.e. using ... ; 10t
    ret ; 10t => (17)+20+6 + (11*4+4 ...
    David Jones David Jones October 2013 Development
  • SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…

    ... the screen in 768 bytes. (Although at present ... It's 362 bytes including 64 bytes for the BLOCK/2 ... hl)
    sub (ix-17)
    ld d,a ... cp (hl) ;compare first bytes
    pop de ;(will ...
    Battle Bunny Battle Bunny November 2013 Sinclair Basic
  • Beepola 1.07A new version of Beepoa, v1.07, is now available for download from:- [url]http://freestuff.grok.co.uk/beepola/[/url] (1.63MB zipped exe, no installe…

    ... :-

    v1.07.01 - 17/Nov/2013
    ----------------------
    1 ... songs containing drums by 32 bytes
    (thanks [url=http://1bit ...
    ccowley ccowley November 2013 Announcements
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... LD DE,17
    CALL $0556 ; LD-BYTES
    ... Length
    CALL $0556 ; LD-BYTES

    #endasm
    17
    CALL $0556 ; LD-BYTES
    ... LD DE,17
    CALL $0556 ; LD-BYTES
    ... br /> CALL $0556 ; LD-BYTES

    #endasm
    dbolli dbolli November 2013 Brand new software
  • P47 Thunderbolt Colour/Attribute hacking?I've seen someone (can't remember who now, sorry) hacking into monochrome games such as After The War and Outrun Europa and adding/changing the colou…

    ... sets the colours for the 17 rows of the playing area ... /> [code]
    org 23296 ;19 bytes; 48k only
    ld hl ...

    org $7ed2 ;3 bytes
    jp 23296
    [/code]
    Battle Bunny Battle Bunny December 2013 Games
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... , 256*N+N ; columns 17 and 18(*)
    push de ... (*)
    push ix ; columns 17 and 18
    push bc ... a ;8t (2b)
    ;+8 bytes +46 Tstates

    N ...
    DenisGrachev DenisGrachev January 2014 Brand new software
  • The Evolution of Some Nonsense[center] [B]TIMINGS FOR 100 BOUNCES[/B] [b]Ten Bouncy UDGs in BASIC[/b] [img]http://www.users.globalnet.co.uk/~jg27paw4/pourri/a000test.gif[/img] [u…

    ... +CHR$ 16+CHR$ 6+CHR$ 17+CHR$ 2
    PRINT a ... byte - so they're four bytes. This means that your colour ... +CHR$ 16+CHR$ 6+CHR$ 17+CHR$ 2
    PRINT a ...
    Dunny Dunny January 2014 Sinclair Basic
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... (*)
    LD DE,nn ; columns 17 and 18 (*)
    LD BC ... 20
    PUSH DE ; columns 17 and 18
    PUSH HL ... /> The code above has 81 bytes and takes 448 T-states ...
    Einar Saukas Einar Saukas January 2014 Brand new software
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... (*)
    LD DE,nn ; columns 17 and 18 (*)
    LD BC ... 20
    PUSH DE ; columns 17 and 18
    PUSH HL ... /> The code above has 81 bytes and takes 448 T-states ...
    Jerri Jerri January 2014 Brand new software
  • 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…

    ... 'space'[/code]
    The 6 bytes consist of:

    3 ... bytes for where to print it< ... amp; column]

    2 bytes to set the ink colour ... set the other control codes 17-21 for the text ...
    Do I just add 17,3 for the paper colour ...
    Speccy_James Speccy_James February 2014 Development
  • From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…

    ... just copies the first 160 bytes from v$() to the ... with the LET in line 17. This takes 25856T according ... : GO SUB 90
    17 LET a$=v$(TO 160 ... doing. You're copying 160 bytes, which you say is ... 2x2 characters, which makes 640 bytes by my arithmetic. Then, ...
    Battle Bunny Battle Bunny March 2014 Sinclair Basic
  • IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…

    ... the IF1bis
    build 65 / 17.02.2014

    ESC ... Sat Mar 15 11:07:17 2014
    230-
    230 ... Transfer complete.
    ftp: 2933165 bytes received in 49.68Seconds 59 ... /> 221-You have transferred 2933165 bytes in 1 files.
    221 ...
    Pierre Pierre March 2014 Hardware
  • IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…

    ... the IF1bis
    build 65 / 17.02.2014

    ESC ... Sat Mar 15 11:07:17 2014
    230-
    230 ... Transfer complete.
    ftp: 2933165 bytes received in 49.68Seconds 59 ... /> 221-You have transferred 2933165 bytes in 1 files.
    221 ...
    Dan Antohi Dan Antohi March 2014 Hardware
  • Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…

    ... [*]ld ix,address of 17-byte file header (structure ... /2/3 = program/narray/$array/bytes)
    ------ ($01-$0A) = ... ------ ($0F-$10) = number of bytes in program (ie. excluding variables ... ($0E) = array name
    for bytes:
    ------ ($0D-$0E) = start ...
    Battle Bunny Battle Bunny March 2014 Development
  • IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…

    ... the IF1bis
    build 65 / 17.02.2014

    ... .tap.
    zip (8136 bytes).
    226 Transfer complete.
    ftp: 8136 bytes received in 0.20Seconds 41 ... 221-You have transferred 8136 bytes in 1 files.
    221 ...
    Pierre Pierre March 2014 Hardware
  • New bicolour game coming very soon.And they say budget software houses can't afford to advertise :-D [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/elstompo_advertsmall_…

    ... (*)
    LD DE,nn ; columns 17 and 18 (*)
    LD BC ... 20
    PUSH DE ; columns 17 and 18
    PUSH HL ... /> The code above has 81 bytes and takes 448 T-states ...
    Einar Saukas Einar Saukas April 2014 Games
<1…11121314151617…34>

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