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<1…15161718192021…34>
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... b ; reset AT_FLAG
    rst 8 ; error "B Integer out of ... ; mask to change right half of the screen byte
    SCR_LEFT:
    byte is always blank
    ld b, 8 ; execute loop 8 times ...
    Einar Saukas Einar Saukas August 2011 Development
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ...

    .data?
    keyboard_state BYTE 256 dup (?)

    keyboard_hasfocus ... BYTE ? ; TRUE if main window has ...
    Woody Woody August 2011 Emulators
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... b ; reset AT_FLAG
    rst 8 ; error "B Integer out of ... ; mask to change right half of the screen byte
    SCR_LEFT:
    byte is always blank
    ld b, 8 ; execute loop 8 times ...
    Einar Saukas Einar Saukas August 2011 Development
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... b ; reset AT_FLAG
    rst 8 ; error "B Integer out of ... ; mask to change right half of the screen byte
    SCR_LEFT:
    byte is always blank
    ld b, 8 ; execute loop 8 times ...
    Einar Saukas Einar Saukas August 2011 Development
  • Sinclair Programs uploaded.I've just uploaded a ZIP containing all the 'Sinclair Programs' programs and the instructions for each one. (Well all the ones from 'The Type Fantast…

    ... Osborne - Apr'84
    Free Byte - FJ Tew - Mar'84
    Right/Left Pixel Scroll (aka. Smooth Screen Scrolling ...
    Neil L Neil L August 2011 MIA/STP/SDP
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    [QUOTE]
    Would I be right in assuming that your HALT ...
    PeterP PeterP August 2011 Emulators
  • Unlisted game - The Battle of MaidaI've just moved back the the UK and unearthed a game called "The Battle of Maida". I really loved this game back in the 80s and I believe a friend of…

    ... Mono @ 22050 hz
    to 8-bit mono @ 44100Hz:

    right, as I can "see" at ... "development" copy? Line 870 (from byte offset 0x1542 onwards) reads like ... some numbers, that the 5-byte binary version following the decimal ...
    lfaria lfaria September 2011 MIA/STP/SDP
  • Artist RequiredAs some of you may be aware, at the homebrew coding weekend back in July I volunteered to write a Spectrum game to be shown at this year's Replay exh…

    ... be able to move in 8 directions, but you wouldn't ... at the bottom left and right corners. Perhaps customers could queue ... dressed as storm troopers at Byte Back, so perhaps they might ...
    jonathan jonathan September 2011 Development
  • New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…

    ... it still doesn't feel right.

    [IMG]http://tardis ...
    Einar Saukas Einar Saukas September 2011 Development
  • Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…

    ... hl ; point to the key_xxx_pattern byte
    ld (hl),a ; ... save the pattern byte
    dec hl ; go ... back to the key_xxx_port byte
    ld a,(de) ; ... br /> msg_right: defm CC_AT,10,8,"Right ?",255
    msg_fire: defm CC_AT ...
    polomint polomint September 2011 Development
  • Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…

    ... based graphics system. You're right though, i'm using the ... ,hl ; now HL=TILESETADDR+code*8[/CODE]

    As a ... ; Using LDI, 16 ticks per byte * 22 = 352
    ldi
    Zoltar Zoltar September 2011 Development
  • Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?

    ... Macro that generates a 256-byte mirror table.[/QUOTE]
    I ... moving each bit to the right place:[code]
    REPT 256 ... )|((x>>1)& 8)|((x& ...
    obo obo October 2011 Development
  • playing sound samples from Boriel's zxbasic-compilerfirst of all, sorry if it sounds confusing if i'm posting this thread here instead instead of at Discussions:SinclarBasic it's because this is more …

    ... source and length in the right place, the problem is that ... At Adr05 if no new byte needs to be fetched, the ... . But when a new byte does need to be fetched ... time to fetch the next byte, you have a sample ... = 46 kHz. With 8 samples in a byte you are going through ...
    Alcoholics Anonymous Alcoholics Anonymous October 2011 Development
  • Pixel engines for explosions...Hi... Iv a strange request... I was toying around with an old YS program, which can be found here: [url]http://www.users.globalnet.co.uk/~jg27paw4/ty…

    ...
    ox2: DEFB 137 ;bottom right x co-ordinate
    oy1 ... br /> oy2: DEFB 143 ;bottom right y co-ordinate

    L61678: LD A,8
    L61680: DEC A
    byte..
    ; LD D,243 ; Points ...
    kgmcneil kgmcneil October 2011 Development
  • [NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…

    ... WoS (the first one, 47951 byte long zip file). After loading ... overlay button at the top right of the screen doesn't ... Down gives 8, Up gives 5, Left gives 6 and Right gives ...
    ccowley ccowley October 2011 Emulators
  • [NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…

    ... WoS (the first one, 47951 byte long zip file). After loading ... overlay button at the top right of the screen doesn't ... Down gives 8, Up gives 5, Left gives 6 and Right gives ...
    fms fms October 2011 Emulators
  • New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…

    ... ; all routines set the keyretval byte as shown in definekeys.asm ... hl ; point to the key_xxx_pattern byte
    ld (hl),a ; ... ; go back to the key_xxx_port byte
    ld a,(de) ; ... br /> msg_right: defm CC_AT,10,8,"Right ?",255
    msg_fire: defm ...
    polomint polomint October 2011 Development
  • Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…

    ... mask bits for high byte' Why does he need ... bit per pixel, 8 pixels in a byte.

    byte per character square and ... area is straightforward left to right, top to bottom.
    7
    8 ; enter: hl = valid screen ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…

    ... see pointers passed in for 8 bytes of graphic data, another ... for 8 bytes of graphic data of ... selected. That's right, since loading a byte into pixel memory corresponds ... to setting 8 pixels, you ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • Pac-Man EmulatorMy Pac-Man Emulator for the Spectrum +2A/+3 is now available for download from: [url]http://simonowen.com/spectrum/pacemuzx/[/url] You'll need to su…

    ... drawing. It's drawing at byte boundaries instead of the final ... be extended to use all 8 pixels. In some cases it ... 't think the game looks right when it's ratio is ...
    ewgf ewgf November 2011 Brand new software
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... -- and ignoring the attributes -- one byte represents eight pixels with each ... though the spectrum, unlike other 8 bit computers, has no ... it easy to write 8 pixel x 8 pixel characters to the ... whilst shifting the sprite data right the correct amount before said ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • ZXOOM, does it work?Another game now on the run, but I got some trouble. I've tried to make it run with Spectaculator as well with ZX Spin but it clashes once loaded and…

    ... familiarity ("boundary setting"), and 8 bytes of the image. The ... should be displayed on the right mask;
    - Familiarity ... /> - Withdrawal of familiarity with the right mask.

    4b. ... stored in the attribute byte in the virtual screen ...
    guesser guesser November 2011 Brand new software
  • Auto generated spritesLooking around for some graphics I came across [url]http://blog.disktree.net/?p=19[/url] , one of several such pages. Need the odd 8x8 UDG or two (…

    ... one key press per byte. Pain in the arse ... is increased, stop at 8 (thus 8 bytes created)
    ... ;take the right hand side of the byte
    push ... af
    or c ;byte now symmetrical
    ld ( ... /> inc hl ;ready for next byte
    ret
    ;
    R-Tape R-Tape December 2011 Development
  • Alkatraz protection systemI recently became interested in the Alkatraz protection system, a very widely used tape protection (a infoseek search returns more than one hundred r…

    ... BASIC blocks had an extra byte that probably shouldn't be ... the 5

    Extra byte on both BASIC blocks on ... of 6915)
    Right channel = converts all 8 blocks correctly but it ... [/URL] Infiltrator (US Gold) - right channel only
    [URL]http ...
    richl richl December 2011 MIA/STP/SDP
  • BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…

    ... br /> [QUOTE]L4 LD B,8 ;paper black ink white???[/QUOTE ... ]
    No, 8 characters.
    [QUOTE]LD C ... memory[/QUOTE]
    Write attribute byte.
    [QUOTE]INC HL ; ... .
    [QUOTE]LD B,16; right offset[/QUOTE]
    16 characters ...
    ccowley ccowley December 2011 Development
  • BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…

    ... /> 22 lines.

    No, 8 characters.

    No, 32 ... Paper.

    Write attribute byte.

    Man, you're ... />
    Reckon you might be right there.

    Getting bored ... value.

    Yeah, right back at you.

    ooze48k ooze48k December 2011 Development
  • New Spectrum (Spaceship) Mascot?Original spark here...[url]http://www.worldofspectrum.org/forums/showthread.php?p=588993#post588993[/url] I'm trying to write this without sounding …

    ... a ship that for an 8 way scroller that fits in ... frazzled trying to get it right[/QUOTE]

    I like ... />
    btw nice graphics in Byte Me, I'm gonna have ...
    The Lone Magpie The Lone Magpie December 2011 New game ideas
  • Arcade Game Designer 2.0 releasedI know dozens of you downloaded the previous version of AGD. Well, you can put it away now because I've made some major improvements to that version…

    [QUOTE=NRA;590712]Hello Jonathan)

    I've played a little and think that 'charset' is ok, but I personally find no use for 'palette' tab yet. No nagging, just IMO.
    Ok, so now I can sacrifice an unused letter as a 8x8 UDG instead of 16x16 ...
    jonathan jonathan December 2011 Development
  • Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …

    ... right-most bit). Position 8 is bit 7 in the next byte ... 1 bit to the right, for position 2 two ... shifts right, up to 7 shifts right for position ... you just use the right one for the position ... quicker than performing the right amount of shifting each ...
    bobs bobs January 2012 Development
  • Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …

    ... a little further to the right, in 1, 2 or 4 ... the sprite, you pick the byte position in memory to draw ... more memory, for 4 or 8 copies of your sprite. Also ... . The sprites that move left/right are pre-shifted 2 pixels ... graphic moves by a whole byte).
    joefish joefish January 2012 Development
<1…15161718192021…34>

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