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<1…14151617181920…34>
  • JSW1 - Changes Between ReleasesHere is a list I'm working on of differences between JSW versions. I'm not currently 100% sure what all the changes do although by using one of the J…

    ... NOP's before a LD BC, 2862 to just one NOP ...
    spider spider 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 …

    There 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 incorporates a built in cheat mode. Feedback on this point is appreciated. To quote the readme:

    spider spider September 2013 Sinclair Miscellaneous
  • RCS HelpThis plea for HELP is related to the RCS screen handling routines thread. To further save space in the current crop of routines its looking like the …

    ... routine takes an address in BC and plonks the RCS equivalent ...
    jamorski jamorski September 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…

    ... of BC
    pop bc ;BC=$2d2b (discard)
    pop bc ;BC=$3365< ... /> push de
    push bc
    ld de,(23653) ; ...
    ld bc,10
    add hl,bc
    call ...
    Battle Bunny Battle Bunny October 2013 Sinclair Basic
  • LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…

    ... LDIR. Leaves
    ;; zero in BC. Does not use IX or ...
    ;; accumulator but not shadow BC, DE or HL.

    ;; to copy. BC is the byte counter; on ...
    stephenw32768 stephenw32768 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…

    ... br /> push af
    push bc
    push de
    ... br /> push af
    push bc
    push de
    ... br /> push af
    push bc
    push de
    ... br /> push af
    push bc
    push de
    ...
    Einar Saukas Einar Saukas October 2013 Development
  • Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…

    ... /> Now whether you use DE, BC, IX or IY, the instructions ...
    joefish joefish October 2013 Development
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... /> {
    #asm
    LD BC,37000


    ... ; preserve registers.
    push bc
    push hl
    ... 56

    LD BC,255
    LD DE,04000h ... /> pop hl
    pop bc
    pop af
    ...
    slenkar slenkar October 2013 Development
  • 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…

    ... into print string
    push bc
    call print ;call the ... print routine
    pop bc
    djnz loop
    ret ... /> ld de,rktdat
    ld bc,33
    call 8252
    daveysludge daveysludge November 2013 Development
  • Few games I'm after...Hi, as the title says. Maybe just one note - I've asterisked some titles that I'm happy to buy even if not in a bundle; also I'm not looking for any …

    ... />
    - Bomb Jack
    - Buffalo Bill's Rodeo Games *
    - Chicago ...
    tomascz tomascz November 2013 Wanted
  • that "listing variables during runtime" thingWell, I did eventually finish this, but with my meds playing up I don't have much time each day that I can spend at the computer, so it's taken rathe…

    ... contain r & k and BC=ScrDol0 prior to the call ...
    Battle Bunny Battle Bunny November 2013 Sinclair Basic
  • 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 …

    ... minus 32
    loop push bc
    ld b,32 ;8 ...
    djnz loopa
    pop bc
    djnz loop
    ld ...
    daveysludge daveysludge November 2013 Development
  • Repton 3Hi all, I'm after a copy of Repton 3 for the Spectrum. I know it was written, but never officially released. Either that, or if someone knows the a…

    ... (can't remember his name?Bill something) and can either supply ...
    geraldholdsworth geraldholdsworth November 2013 Games
  • IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…

    ... than using HL, DE and BC but at the
    moment ...
    MatGubbins MatGubbins December 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…

    ... />
    ; open file
    ld bc,$0501
    ld de,$0002 ... /> ; finsi
    ld bc,5
    add iy,bc ; iy points to ... /> paginar:
    di
    ld bc,32765
    ld (BANKM),a ...
    Zup Zup December 2013 Development
  • 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…

    ... reset
    ;
    ; uses : af, bc, de, hl

    ; try ... ,b
    ld b,0 ; bc = MSW(HL * E)

    ld e,b ; bc = LSW(HL * D
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Development
  • Ghosts n' Goblins loaderI'm trying to put Ghosts n' Goblins onto a +3 disk but struggling to understand the mc loader. Basic loader [code] ink 7 : clear 25000 : load "" cod…

    ... HL,65240
    65227: LD BC,236

    65230: ... HL
    65235: DEC BC
    65236: LD A,B ...
    65243: PUSH BC
    65244: PUSH BC
    65245: DEC ... INC SP
    65250: POP BC
    65251: ADD HL, ... IY, 23610
    65441: POP BC
    65442: RET
    ...
    Speccy_James Speccy_James February 2014 Development
  • Venturespeak Helplooking at the code from ZX Computing, October, November & December 1986. How do I make the code do more then 3 letters say 5. and could it be made …

    ... ,032
    60141 C5 PUSH BC
    60142 D7 RST #10 ...
    60143 C1 POP BC
    60144 05 DEC B ...
    ardentcrest ardentcrest February 2014 Development
  • Morcar's Selling or trading threadThinning out my collection so i can get more of what i want. If you want anything on here let me know and we can work out something. I am also up f…

    ... Pack (Cosmic Cruiser, B.C Bill, Pedro, Zzoom, Zip-Zap, Alchemist ...
    morcar morcar February 2014 Sales
  • Using the stack to blit bufferI was using a ldir to blit my back buffer to the screen RAM, and it was working pretty well if not rather slow. After reading about using the stack …

    ...
    pop af
    pop bc
    pop de
    pop ...
    pop af
    pop bc
    pop de
    pop ...
    Atari_Jetman Atari_Jetman February 2014 Development
  • Scrolling Bi-Colour Engine for 4-Player GamesJust putting this code up for people to have a look at. Far from finished. Should simply compile and run a bit of a demo. Only good for 128K and +…

    ... de,49087
    ld bc,interrupt_main_end-interrupt_main
    ldir ... /> call print_char_obj_hl_b_c
    pop bc

    ;Sides ... />
    push bc
    push bc
    ld hl, ... br /> print_char_obj_hl_b_c
    push bc
    push hl
    ...
    joefish joefish March 2014 Development
  • dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…

    ... mc+5,0:
    LET bc=USR mc: IF PEEK bytes ... +5,PEEK (bytes+12): LET bc=USR mc
    10 LET ...
    Battle Bunny Battle Bunny March 2014 Sinclair Basic
  • Once Upon A Time In Speccy Land....Yea, once upon a time in f@ckin Speccy Land huh.... Pissed off, fed up..basically don't give 2 ****s! Mongy Lards, Big Boobs, Big Women...F@CK IT!!! …

    ... and send them(Probe) the bill!
    Its just a f ...
    rubberkeys rubberkeys March 2014 Chit chat
  • Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…

    ...
    loop1:
    ld bc,32 ;BC is counter for block copy ...
    LuMan LuMan April 2014 Development
  • SBC or ADDIs this dangerous/bad practice thing to do..... I want to subtract 64 from a number, but to save a few bytes can I just add (65536-64) 65472 to the…

    ... ,32768
    LD BC,65472
    ADD HL,BC
    LD (test ... ,32768
    LD BC,64
    SBC HL,BC
    CCF ; sometimes ... to SBC,
    just feed BC with the correct value and ...
    MatGubbins MatGubbins April 2014 Development
  • New version Emulator ZEsarUX-1.0Hi I have uploaded a new version of my Spectrum/ZX80/ZX81 emulator. This is a major stable version, with real timing for all the models and with hi-…

    ... bit operations for HL, DE, BC
    Added interlace mode
    chernandezba chernandezba May 2014 Emulators
  • Dragon Ninja (Ocean - Imagine) music by Jonathan Dunn?As I am quite sure that the music was composed by this famous Spectrum musician, but it is not credited yet (and his game does not appear in the cred…

    ... were other people involved, as Bill Harbison), could anyone prove, maybe ...
    Ivanzx Ivanzx May 2014 Infoseek database
  • Problem with DivIDEHi There is a problem on ZX-Spectrum +2 (Grey Model) + DivIDE 2k14 here is video with problem [URL="http://www.youtube.com/watch?v=nIQboFo7Epc"]h…

    ... ,#5818
    i_02
    ld bc,#001f
    in a,(c ... i_03
    ld bc,#0018
    add hl,bc
    ld a ...
    Jerri Jerri May 2014 Hardware
  • Fuse bug? Strange T state countingI was testing delay routine presented [URL="http://www.worldofspectrum.org/forums/showthread.php?p=214851"]here[/URL]. I'm reproducing its listing: …

    ... GPL
    ; wait bc T (including call; bc>=141)
    ; ... 141
    add hl,bc
    ld bc,-23
    .loop ... add hl,bc
    jr c,.loop
    LD BC,141
    CALL DELAY
    TK90XFan TK90XFan May 2014 Emulators
  • Currah ?Speech channelIt seems to me that it would be nice to be able to send words to the ?Speech with PRINT #5;"Speak English to me, Jimmy" or some such. There really i…

    ... /> push af ; save
    push bc
    push de ; the
    pop de
    pop bc
    pop af
    ei ... it now

    ld bc, 20
    call pause_1
    chev chev June 2014 Development
<1…14151617181920…34>

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