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<1…14151617181920…34>
  • Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…

    ... pair with starting coords.
    ld (plx),hl ; set player coords ... ,15 it should read ld hl,21+256*15. I'll make ...
    jonathan jonathan March 2007 Development
  • Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…

    ... 1M 4T
    ld a, h ; get h into a 1M 4T ... screen segment 2M 7T
    ld h, a ; store the correction ...
    HexDump HexDump April 2007 Development
  • Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…

    ... 1M 4T
    ld a, h ; get h into a 1M 4T ... screen segment 2M 7T
    ld h, a ; store the correction ...
    Metalbrain Metalbrain April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... screen segment 2M 7T
    ld h, a ; store the correction 1M ... segment we are in
    ld h, a ; store the correction
    Kiwi Kiwi April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... ;8
    LD H,A
    EXX
    LD DE,SourceAttributeData
    LOOP:
    EXX
    LD A,(DE)
    INC DE ... br /> LD H,A
    LD BC,#0300
    LD DE,#5800
    LD IX ... ,SourceAttributeData
    LOOP:
    LD L ...
    omega omega April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... ,TABLE>>8
    LD H,A

    POP BC ... /> LD C,L
    LD C,(HL)
    LD B,L
    LD B ... ,(HL)
    LD (#5800),BC ... ,(HL)
    LD B,L
    LD B,(HL)
    LD (#5802),BC ...
    omega omega April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... ,TABLE>>8
    LD H,A

    POP BC ... /> LD C,L
    LD C,(HL)
    LD B,L
    LD B ... ,(HL)
    LD (#5800),BC ... ,(HL)
    LD B,L
    LD B,(HL)
    LD (#5802),BC ...
    Dr BEEP Dr BEEP April 2007 Development
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... ,TABLE>>8
    LD H,A

    POP BC ... /> LD L,C
    LD C,(HL)
    LD L,B
    LD B ... ,(HL)
    LD (#5800),BC ... ,(HL)
    LD L,B
    LD B,(HL)
    LD (#5802),BC ...
    omega omega April 2007 Development
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... after each INC H, and third spanning ... />
    inc h
    ld a,h
    and $07< ... /> ld a,h
    sub $08
    ld h,a
    ld a, ... l
    add a,$20
    ld ... /> ld a,h
    add a,$08
    ld h,a
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ...
    loadgraphic
    ld hl,16384 ;screen address
    ld a,h ;load high address ... 8
    ld h,a ;return into h (high byte of ... screen address)

    ld ...
    moveonecharacter
    ld c,8 ;reset c, number ...
    Rickard Rickard May 2007 Development
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ... />
    loadgraphic
    ld hl,16384 ;screen address
    ld b,8 ;counter, number ... />
    setstartvariables
    ld d,31 ;d=number of ... byte again
    ld a,h ;load high address into ... 8
    ld h,a ;return into h (high byte of ...
    Dr BEEP Dr BEEP May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... :
    xor a ; 4
    ld de, overhead ; 10
    sbc ... hl, de ; 15

    ld de, 25 ; 10
    .lp1 ... />
    ld h, HIGH table ; 7
    ld l, (hl) ; 7
    ld h, HIGH ...
    t_23: nop
    t_19: ld a, r
    ret
    icabod icabod May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... br /> xor a ; 4
    ld de, overhead ; 10
    sbc ... />
    ld h, HIGH table ; 7
    ld l, (hl) ; 7
    ld h, HIGH ... t_23: nop ; 4
    t_19: ld a, r ; 9
    ret ... t_21: nop ; 4
    t_17: ld a, 0 ; 7
    ret ...
    icabod icabod May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... br /> ld h, HIGH table ; 7
    ld l, (hl) ; 7
    ld h, HIGH ... addition, removing the two "ld h," instructions and cutting 14 ... /> xor a ; 4
    ld de, overhead ; 10
    ... br />
    [CODE]
    ld de, -overhead ; 10
    ...
    Metalbrain Metalbrain May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... the addition, removing the two "ld h," instructions and cutting 14 states ... be replaced by:[CODE]
    ld de, -overhead ; 10
    add ... hl, de ; 11
    ld de, -21 ; 10
    .lp1 ...
    icabod icabod May 2007 Development
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ... /> org #8000

    start ld a,l
    sub 90 ... ,no-out
    inc h
    dec h
    jr nz,no ... ,a ; pointer for remains
    ld h,128 ; end of this routine ...
    ld l,(hl) ; fetch remain start ...
    Dr BEEP Dr BEEP May 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... ////////////////////////////////////////////////////////////////////
    .start
    ld hl,_sbuf
    [/code]
    ld h,(hl)
    ld l,a ;; hl ... hl so a "ld hl,_scroll_buffer" will do ... accessed in asm as "ld hl,(_scroll_buffer)". If, ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... this

    [code]
    ld b,Y-COOR ; I set ...

    ld l,b
    ld h,tableycoor
    ld d,(hl) ; 64 ... ..87*8
    inc h
    ld a,(hl) ; 0*8,32 ... *8 *3
    inc h
    ld l,c
    add a ... , ..... 30*8, 31*8
    ld e,a

    de ...
    Dr BEEP Dr BEEP July 2007 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ...

    [code]
    ld e,n+1 ; number of ... /> ld hl,#4000
    ld d,l
    loop0 ld b,h
    loop1 dec e
    ret z
    ld ... nz,loop3
    inc h
    ld a,h
    and 7
    jr z,loop0
    ld h,b
    jr loop1
    Dr BEEP Dr BEEP July 2007 Development
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... STEPDOWN INC H\ LD A,H\ AND 7\ JR NZ,$+12\ LD A,L ... ,A\ JR C,$+6\ LD A,H\ SUB 8\ LD H,A
    [/code]
    BloodBaz BloodBaz July 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... "ld bc,(9*256)" in do_scroll() and "ld hl,(23*256) / ld bc,(9*256)" in ... blit() I changed to "ld bc,9*256" and "ld ... hl,23*256 / ld bc,9*256". I ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Compressors are available for Speccys ?Hi folks, although I was an wasn't strictly a speccy coder in the glory days (amstrad & amiga for the most part), I have secides to arse about with …

    ... ZERO

    LD HL,50000 ;SOURCE (COMPRESSED DATA ... )
    LD DE,#4000 ;DESTINATION
    ... /> LD B,A
    LD A,C
    LD C ... ,(HL)
    INC HL
    PUSH HL
    LD H ... ,D
    LD L,E
    ...
    piters piters July 2007 Development
  • Machine CodeHi all, I want to get a machine code/assembler/dissasembler program from the WOS archives. But what in your opinion would be the best to get? I don`t…

    ... ]

    [code]

    LD IXH,10

    in ... /> 20 DEFB 221
    30 LD H,10

    [/code]
    Dr BEEP Dr BEEP July 2007 Sinclair Miscellaneous
  • Machine CodeHi all, I want to get a machine code/assembler/dissasembler program from the WOS archives. But what in your opinion would be the best to get? I don`t…

    ... error.
    DEFB 221
    LD H,=0
    ENDM

    omega omega July 2007 Sinclair Miscellaneous
  • Help hacking Split PersonalitiesI`ve been hacking away at Split Personalities for the purpose of putting new screens and graphics (items). The current screen is at 41187 and is 160…

    ... jr nz,m4
    ld bc,$51f
    jr ... push hl
    ld l,c
    ld h,b
    add ... hl,de
    ld c,a
    ld ...
    FrankT FrankT July 2007 Games
  • Splitting Images tzx maybe not perfectI've been hacking this game and its loader. Also the save routine is intact in this game. It saves a block with a pilot length of 801 pulses. Test…

    ... $03
    ld c, a
    ld h, $00
    ld b, $b0
    ld a, h
    xor l
    ld h, a
    call ...
    ld h, a
    ld l, a
    ld ($5ae1), hl
    ld ($5afd ... /> l_a30d: ld a, h
    xor l
    l_a30f: ld h, a
    ld a ...
    FrankT FrankT August 2007 MIA/STP/SDP
  • Bubble Bobble EditI thought I might have a go at editing Bubble Bobble myself after reading this... [url]http://www.worldofspectrum.org/forums/showthread.php?t=15452[…

    ... ld (82d7),a ;overwrite with new level (self-modify)
    ld h ... ,0
    ld de,858c
    ... ;grab our colours
    ld hl,#860c ;location of big ... ;set bright attribute
    ld (830a),a ;store it+paper ...
    Mr. Anonymous Mr. Anonymous September 2007 Development
  • Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…

    ... />
    [code]
    .test
    ld h,96 ; start pixel at centre ...

    .flood2
    ld a,h
    call SPGetScrnAddr ; b = pixel ... ; save current pixel mask
    ld b,$80 ; new incoming mask ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Minigame Compo 2007Hi there, also this year, there'll be a minigame competition, open to all 8-bit computers and consoles. It consists on writing games whose size (…

    ... to destination


    ld hl, data
    exx
    LD (DE), A
    ; INC ... />

    dolz ld h, b ;GET OFFSET
    ld l, a



    ld c, b
    inc b ...
    Fikee Fikee January 2008 Development
  • Minigame Compo 2007Hi there, also this year, there'll be a minigame competition, open to all 8-bit computers and consoles. It consists on writing games whose size (…

    ... /> out (254), a
    ld (de), a
    inc de ...
    dolz ld h, b ;GET OFFSET
    ld l, a
    [code]

    ld hl, data
    exx
    ld (de),a ; first time ... br /> dolz ld h, b ;GET OFFSET
    ld l, a
    Dr BEEP Dr BEEP January 2008 Development
<1…14151617181920…34>

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