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<1…14151617181920…34>
  • New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…

    ... loads (which means emulating the load routine's instruction-by-instruction ... the loader depending on which byte you just decoded. I've ... at the end of the load (haha) which is dependant upon ...
    ghbearman ghbearman May 2007 Development
  • New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…

    ... loads (which means emulating the load routine's instruction-by-instruction ... the loader depending on which byte you just decoded. I've ... at the end of the load (haha) which is dependant upon ... one ;) ). Kraplock's uses every byte in the full 48K RAM ...
    Woody Woody May 2007 Development
  • Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…

    ... and stop bit for each byte and arbitrary pause between them ... pulse. Similary the Bleepload, Dynamic Load, etc. are stored in the ...
    Tom-Cat Tom-Cat May 2007 Emulators
  • Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…

    ... pulse. Similary the Bleepload, Dynamic Load, etc. are stored in the ... changed the speed after each byte...

    Patrik
    Patrik Rak Patrik Rak May 2007 Emulators
  • Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…

    ... done with GDB... where a byte of data has one additional ... will never be able to load the new format(s). The ...
    Tom-Cat Tom-Cat May 2007 Emulators
  • 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…

    ... part rotates first byte
    ld a,(hl) ;load the first screen ... byte into A
    rr ... (hl),a ;write earlier rotated byte to screen
    inc hl ... to next byte to the right
    ld a,(hl) ;load into ...
    Dr BEEP Dr BEEP 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…

    ... not necessary at all to load the screen address into A ... (HL)". It's only 1 byte (rather than 3) and it ...
    icabod icabod 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…

    ... from original 64 byte machine code to 49 byte. Regarding speed it ... br /> inc de ;next graphic byte
    djnz loadloop ;decrease b ... to top of byte again
    ld a,h ;load high address ... times, for all coloums in byte

    moveonecharacter
    ...
    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…

    ... from original 64 byte machine code to 49 byte. Regarding speed it ... br /> inc de ;next graphic byte
    djnz loadloop ;decrease b ... to top of byte again
    ld a,h ;load high address ... times, for all coloums in byte

    moveonecharacter
    ...
    Dr BEEP Dr BEEP May 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... moving.

    Since the byte copy takes a serious chunk ... each cell into an 8-byte buffer before copying the result ... that time. These sprites are LOAD sprites only (they obliterate background ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Cannon BubbleHello! I would really like to transffer this game ( [url]http://cezgs.computeremuzone.com/eng/card.php?id=14[/url] ) to my REAL +3 disk drive. Becau…

    ... the following BASIC program to load it all in:

    10 CLEAR 24537
    20 LOAD "" SCREEN$ : LOAD "" CODE 24538
    30 ... +a : out 32765,16+a : LOAD "" CODE 49152 : NEXT i
    40 ...
    StuBruise StuBruise June 2007 Games
  • Cannon BubbleHello! I would really like to transffer this game ( [url]http://cezgs.computeremuzone.com/eng/card.php?id=14[/url] ) to my REAL +3 disk drive. Becau…

    ... the following BASIC program to load it all in:

    10 CLEAR 24537
    20 LOAD "" SCREEN$ : LOAD "" CODE 24538
    30 ... +a : out 32765,16+a : LOAD "" CODE 49152 : NEXT i
    40 ...
    DEATH DEATH June 2007 Games
  • 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…

    ... the program again (don't load up a fresh copy!) with ... code for each recognized command byte. For the 0x16 case ( ... the string following the command byte sequence just interpretted. The surrounding ... s display layout has each byte in a character square separated ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... [code]
    extern uchar *scroll_buffer(49152);
    [/code]

    byte variable called "scroll_buffer" whose value will be stored at 49152 ... ie 49152. The *value* of "scroll_buffer" is the 2-byte word ... the 2-byte value 30000 to address 49152 where the ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... ]
    .custom
    ld hl,49152
    ld c,0
    byte table at address 0xd000 containing ... im2_Init() call creates the 257-byte interrupt vector table at address ...
    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…

    ...
    plot ld BC, (coord) ;load the coords into BC
    byte per address
    add a ... ;hl now holds the 8 byte aligned scrn address
    ... each address representing a 8 byte aligned Y address. The ...
    Arjun Arjun July 2007 Development
  • 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…

    ... is the code for the load and save routines. Its very ...
    ld a, $c7 ; flag byte
    ld ix, $4000 ; start ...
    jp save

    ; Load code
    org $a168
    FrankT FrankT August 2007 MIA/STP/SDP
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... /> 130 PRINT AT 15,0;"Byte quantity:";cby
    140 ... used it to load headerlessly a program or byte block to ... 55 SCF ;CARRY SET means LOAD, CARRY RESET means VERIFY
    Load) ;Execute ROM's LOAD BYTES
    201 ...
    Marcelo Marcelo August 2007 Sinclair Basic
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ...
    [code] 1 LOAD "" SCREEN$
    2 LOAD "" CODE : RANDOMIZE USR 0 ... call, if the five-byte numeric representation is POKEd correctly ... Speccy fiddles with 5-byte numbers is depicted in ... between 0 and 65535 (two-byte numbers), the representation is:< ...
    Marcelo Marcelo August 2007 Sinclair Basic
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... to see (unless you LOAD it headerlessly as CODE above ... it a-byte-at-a-time).

    To load a block ... data, but change the block load address: [B]LD IX, ... (17,xx,yy), and the load header/block flag: [B]LD ... plenty of free RAM to load your block.

    ...
    Marcelo Marcelo August 2007 Sinclair Basic
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... trying to see (unless you LOAD it headerlessly as CODE above ... a-byte-at-a-time).[/QUOTE]

    Thanks. I will load ... way I'm able to load part of it is with ...
    zxbruno zxbruno August 2007 Sinclair Basic
  • Meteor Storm desn't work (chapter 2)This is a continuation of a thread wrote some weeks ago. Try to load the tzx file: 1.- score is corrupted 2.- after playing, if you get a new scor…

    ... Mother of Charlotte TZX wont load in Spin, and CRASHES Spectaculator ...
    Jon Needle Jon Needle October 2007 Games
  • 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…

    ... inc l ; move right one byte
    ld a,l ; ... ld a,b ; within byte
    add a,a< ... ld (hl),a ; fill byte on screen
    scf ; ... position the virtual tape to load "figure4.tap". It won' ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Testing the Ram on a Toastrack 128KHi All My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the background scr…

    ... . Have done this for every byte in every page bar 5 ... ones with fruitier music all load ok but they are still ...
    Womble Womble October 2007 Hardware
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... ROM, one could make a load of commonly used routines and ... ULA doesn't put a byte on the bus after the ... anywhere. The CTC puts a byte on the data bus so ...
    LaesQ LaesQ October 2007 Hardware
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ...
    ld a,(de) ;copy byte. . .
    ld (hl),a ;. ... /> sub a ;?? prepare blank byte to print
    ld ( ... ),a ;??print a blank byte on line1
    nextbyte ... ex (sp),hl ;?? load posn of byte to be copied, save ...
    pop hl ;load byte to be copied to
    bigjon bigjon February 2008 Development
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... [/quote]This equals $5800, the byte above the display file and ... the first byte of the attribute file. Why ... />
    Should the next cycle load the stack pointer with the ...
    bigjon bigjon February 2008 Development
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... operation will start at byte 4 (14 bytes less ... /> This equals $5800, the byte above the display file and ... the first byte of the attribute file. ... pop first reads the byte there and then increments ... Should the next cycle load the stack pointer with the ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 Development
<1…14151617181920…34>

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HitBox

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load 29K 41.7K
49152 484 767
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