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Search Again :: Adv Search 1000 results in 0.029s
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  • Converting UDG to 2x2I've got a udg that I want to display in different sizes. Obviously I just print it for normal size, I can use the udg in bin format to display it ea…

    ... los nibbles.
    ' Para cada byte, se aislan los nibbles, se ...
    na_th_an na_th_an October 2012 Sinclair Basic
  • my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…

    ... e, (hl); inc hl; color right
    ld bc, # 20: sbc ... access to attributes 2byte/3 byte
    push hl
    ld ... of how to reduce the byte 20 to 21.1st code ... hl: ldir
    add a, 8: and # 3f: ld (de), a ... replace the 2-byte of add a, 8 to 1 byte add a ...
    g0blinish g0blinish October 2012 Development
  • IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…

    ... is just use a double byte ld to get the two ... /> cp 241 ; compare to far right
    jp z,shprst ; yes ... ; reset x
    ld a,8
    add a,h ; add ...
    guesser guesser November 2012 Development
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... : 0 for the standard attribute byte for each 8x8 pixel block ... Timex HiColour mode (one attribute byte for each scan of 8x1 ... with Cobra too, and the scroll is as soft as always ... [b]TO-DO[/b] list right now:
    - Fix a contention ...
    mcleod_ideafix mcleod_ideafix November 2012 Hardware
  • windows 8 !!!!!!!!I've just tried windows 8 on a new laptop, and I hate it already ! You're not supposed to close windows anymore, just keep opening new ones and windo…

    ... been forced to recommend "Windows 8 for Dummies - Senior edition" which ... "dumbified" even more than "Windows 8 for Dummies". But since all ... it. Also, those who have 8 Pro already have downgrade rights ... cursor to help you scroll tiles left and right if you took ...
    zxbruno zxbruno November 2012 Chit chat
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... files have bit K of byte N corresponding to address ... )
    int mapstart = 256*savemsb/8;

    // Save the ... /> + // Note: bits are filled from right (bit 0) to left (bit ... ) ; i++)
    - map[i/8] |= (seen[i] != 0)
    SkoolKid SkoolKid December 2012 Emulators
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... simply re-interpret the 8 bit attribute bytes read ... in a second attribute byte immediately after the first ... Half Cell mode, one byte is interpreted to specifying the ... other byte the ink and paper colours for the right 4 ... 1, 2, 4 and 8 pixels and this is ...
    Fruitcake Fruitcake January 2013 Sinclair Miscellaneous
  • Microcontrollers and the SpectrumBeing unusually busy lately, I didn?t get a chance to comment at the time on a remark in an older thread, but I shall take the liberty of doing it no…

    ... /> I think I got everything right on the electronics side and ... seem to get the timings right.[/QUOTE]

    Timing is ... , acting as a tiny 40-byte RAM, to store the state ... /O ports: maximum 4, while 8 would be required.
    Dan Antohi Dan Antohi January 2013 Hardware
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... encoding work.[/QUOTE]

    Right! The RCS format also stores ... all 8 bytes from each character sequentially ... never stored in the same byte), the control bits would introduce ...
    Einar Saukas Einar Saukas January 2013 Development
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... one ends up with 8 bits. Is 8 bits enough to discriminate ... them being in exactly the right place to cancel each other ... every bottom bit of each byte is lost, there's a ... as well just do a byte-for-byte compare.
    joefish joefish February 2013 Development
  • Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…

    ... tab and drag down the scroll-bar continuously and visually check ... /> ld e,a
    cp 8
    jr nz,NEXT128
    Battle Bunny Battle Bunny February 2013 Development
  • Keyboard TrickI know how to use the multi key in BASIC with IN you can get the keys [QUOTE]IN 254+256*(255-2^K)[/QUOTE] K is the keyboard's half row, comes from …

    ... results into a 40 byte array where each byte represents the key ... *256+254
    LD D, 8 ; Loop 8 half-rows

    ; +20 0 9 8 7 6
    ; +25 P ... ,229,1,254,254,22,8,30,5,237,120,15 ... PEEK (a+25) THEN PRINT "RIGHT (P) ";
    70 IF PEEK ...
    BloodBaz BloodBaz February 2013 Sinclair Basic
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... a ROM image. The high 8 KiB would only be accessible ... , in which case, getting this right might actually matter.)

    8 (9th September 1999), which ... 0x0064. The last byte of this three-byte instruction is 0x5b, which ...
    zub zub February 2013 Hardware
  • Unravelling the Spectrum Floating Point Number formatHi Guys, In my head I pretty much understand how the Spectrum's 5 byte FP number format works. The first byte is the signed exponent and the follow…

    ... ) and e as an unsigned 8-bit integer. 128 is the ... .

    More or less right, though. :-)

    I don ... ≤ i ≤ 65535), with the first byte as 0, and the second ...
    zub zub March 2013 Sinclair Miscellaneous
  • Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…

    ... at 4-byte intervals. (This does mean that your 8-bit value ... />
    where n is the byte you want to write to ... ! (Making it stop at the right place is an exercise for ...
    gasman gasman March 2013 Development
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... of the 74LS138 1-of-8 decoders)[/QUOTE]

    Fetch first byte of instruction
    Page ... when fetching the next byte after the address which ... the first byte of an instruction. The byte at this ... at $0F2A-$0FE4 is a right pain! I can hack ...
    zub zub April 2013 Hardware
  • ReRun - Speccy OutRun done better[IMG]http://img.photobucket.com/albums/v661/Swainy_boy/outrundelux_zpsb772e8cd.gif[/IMG] Any takers? Smaller sprites, faster game.

    ... center, frame 9 is full right.
    There is no 3D ... sides of the road are 8 frames. The with of the ... 384 because the road can scroll 8 by 8 pixels in x.
    Toniman Toniman April 2013 New game ideas
  • How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...

    ... bit port address, not just 8-bits. You can do ... assumed to be the high byte of the port address]< ... ]

    The low byte is always 254 (FE). i ... bottom one.
    The high byte is 255 (FF) less ... the keyboard then down the right-hand half.

    ...
    joefish joefish April 2013 Development
  • Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…

    ... think the way the upper byte is used matters much. It ... you could probably squeeze out 8 player controlled sprites at 50hz ... ). But I think you're right, any more than that (daisy ... with an idea that needs 8 joystick ports :o
    guesser guesser April 2013 Hardware
  • "Chronos": how fast should it really be?I was reading [URL="http://timfollin.pwp.blueyonder.co.uk/Archive.htm"]Tim Follin's webpage[/URL] the other day and came across a curious remark abou…

    ... -(120+34)/(120+47))~7.8%, which is very close to ... the 7% sounds just about right.

    I am a ... that would address slightly uneven scroll, flickering, etc. Such a modded ...
    introspec introspec May 2013 Development
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... your constraints, 256 byte window sounds about right. To encode the current ... byte(s), you look back ... can try using, say, 6-8 bits for the relative position ... even a simplistic version of byte-based LZ77 is likely to ...
    introspec introspec May 2013 Development
  • Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…

    ... br /> If hero run right to edge of window ... it is the collectable scroll that is causing the ... byte mirror table. If you walk right first and collect the (hidden) scroll ... the bounds of the scroll on the RHS so ... before it crosses the right hand edge. You probably ...
    Bandit Bandit May 2013 Infoseek database
  • Horizontal Scrolling/Per Character gamesHello. Can anyone give me the titles of some Speccy games (preferably good ones, but I don't mind hearing about bad ones too) that scroll the playin…

    ... methods - one is to scroll some data in-memory ... works by having a scroll routine with a different list ... loops around the lot 8 times to do each row ... of scenery. It could scroll at any speed and refresh ... hidden screen with just one byte per character. Then you ...
    joefish joefish June 2013 Games
  • Horizontal Scrolling/Per Character gamesHello. Can anyone give me the titles of some Speccy games (preferably good ones, but I don't mind hearing about bad ones too) that scroll the playin…

    ... works by having a scroll routine with a different ... loops around the lot 8 times to do each row ... commands either skips a byte or rotates it in- ... of scenery. It could scroll at any speed and refresh ... had any problem with the scroll and noticed any jerkyness. ...
    Ivanzx Ivanzx June 2013 Games
  • Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…

    ... access pays an additional 1-byte DD/FD penalty.
    ... me "make the code work right first, then worry about ... case. It must work right first, then I can ... it's probably still not right), but if the compiler/ ... for ls to manipulate the "8.3" format returned from ...
    u6c87 u6c87 June 2013 Development
  • Kempston (joystick) keyboard??Dear all, I am playing with an idea to have a Kempston keyboard. The wiring would be the same as Kempston Joystick to meet its standart, so that all…

    ... have an interface board with 8 joystick sockets on it. ... would ignore the high byte and just use the ... Then you could plug in 8 joysticks, or you could ... that operates Up/Down/Left/Right/Fire on one port, ... game.

    With 8 connectors there would be enough ...
    joefish joefish June 2013 Hardware
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