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<1…15161718192021…34>
  • Correct flag response to BIT n,(HL) etc.When running the test program suggested by Arjun (thanks again), all intructions are passing the flag tests except the BIT n,(HL), BIT n,(IX+dis) and…

    ... , have you implemented the internal register mentioned in Sean Young's ...
    alien8r33d alien8r33d April 2010 Emulators
  • games you wish were a bit easier (or harder?)easier: Rockstar Ate My Hamster -- it just seems impossible to light up all 4 discs in the space of a year. 2 years would seem like more of a challen…

    ... somethng happened and I couldnt register properly)

    add on ...
    def chris def chris May 2010 Games
  • Noise channels on AY-3-8912?I'm trying to reproduce a tune that's a jazzed-up version of classical music - i.e. there are drum beats all over the place, to try and mask the low …

    ... noise frequency than a drum. Register 6 controls the duration of ...
    ajmoss ajmoss May 2010 Hardware
  • Emulator to create log files?Could someone please recommend a Spectrum 128K emulator that can dump the following data to an external text file, while emulating at normal speed? …

    ... . The contents of the IX register, at the entry point of ...
    ajmoss ajmoss June 2010 Emulators
  • How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…

    ... ,Y coordinates passed by the register BC and the signs passed ...
    arfgh arfgh June 2010 Sinclair Basic
  • How to make a comp video cable for +2 greySorry to bog, maybe the clue is just laiden on another thread but.... I have just obtained a 128 +2 grey, fully working BUT the aerial signal is bad…

    ... bad (quite feeble and with "snow"), so I
    begin to ...
    Cignale Cignale June 2010 Hardware
  • A tidy loader for minigamesThe minigame competition doesn't permit the use of separate loaders like [code]10 LOAD "": RAND USR 32768[/code] The loader must be included in the b…

    The minigame competition doesn't permit the use of separate loaders like
    [code]10 LOAD "": RAND USR 32768[/code]
    The loader must be included in the byte count.

    In an attempt to save as many bytes as possible, people have written ...
    ajmoss ajmoss June 2010 Development
  • +2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…

    ... ]The ULA bug which causes snow when I is set to ...
    ajmoss ajmoss June 2010 Hardware
  • Google gone fancy.Has anyone else noticed that the background to Google's home page now contains a fancy if a little gawdy background? What's all that about then? Is …

    ... effort to get you to register with Google as doing so ...
    Scottie_uk Scottie_uk June 2010 Chit chat
  • A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…

    ... routine that, after the usual register pushes, will jump to a ...
    ajmoss ajmoss June 2010 Development
  • Escape from Kharkhan 'new' gameHi all. For all fans of good games I present the English version of "Escape to Kharkhan". The Russian version was available for quite some time, but…

    ... the game displays the annoying "snow effect" ...

    Have fun ...
    Tom-Cat Tom-Cat June 2010 Games
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…

    ... .

    Using LDIR to scroll the full screen in situ ...
    ajmoss ajmoss June 2010 Development
  • Results of Di:HALT (music/graphic/demo)Official Online Place Score Place Score [ ZX Spectrum AY/YM TurboAY Music ] 1 6.30 2 5.66 adversary - Cj Splinter […

    ... 6.36 1 5.77 Scroll? 512b - Shiru/Alex Semenov
    Yerzmyey Yerzmyey July 2010 Sinclair Miscellaneous
  • DS R4 card now bannedJust read this on the register [QUOTE] The R4 card, a Nintendo DS add-on that allows users to transfer Rom code to the handheld, has been banned in…

    Just read this on the register

    [QUOTE]

    ...
    ADJB ADJB July 2010 Chit chat
  • Assembler Shortcuts Reference?Can someone please refer me to a page of assembler shortcuts; ie. concise ways of doing things in a few bytes which might not be immediately obvious?…

    ... A to reset the A register and AND A to reset ...
    Battle Bunny Battle Bunny July 2010 Development
  • Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…

    ... game doesn't need to scroll or anything :???:

    Here ...
    jesus 666 jesus 666 July 2010 Games
  • Poking Super Hang OnYou guys are really good at poking. What I'd like to know is this- is there a guide online that helps explain the basics of poking games to the phili…

    ... around with the infinite time register didn't do much, so ...
    Spector Spector August 2010 Sinclair Basic
  • Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…

    ... ]The contents of the Accumulator (register A) are rotated right 1 ...
    Paddy Coleman Paddy Coleman August 2010 Sinclair Basic
  • SZX Beta 128 (aka TRDOS) block questionHello, I have a question or two regarding the Beta 128 (aka TRDOS) block of SZX. Hopefully someone (Jon, Philip) will help me. What is supposed to …

    ... value written to the system register?

    I would ... the content of the status register on restore.

    ... value written to the system register), but the registers are ... of the status register to the command register on restore, which ...
    Patrik Rak Patrik Rak August 2010 Emulators
  • Jump - How does it work? (get out of menu)Ok, so I saw [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0013401&loadpics=3"]this game[/URL] and wanted to see if it was something worth m…

    ... do at the menu is scroll from one option to the ...
    ZnorXman ZnorXman September 2010 Games
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ... is not described as ula snow - the description of that is ... is what i thought ula snow was whereas that is described ...
    Roger Jowett Roger Jowett September 2010 Hardware
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ...
    00001 add add register n to a
    ... 00010 sub subtract register n from a
    ... load load value n into register defined by m
    ... description says register n it means the register at location ... if n was 1111, the register is F

    Robin Robin September 2010 Chit chat
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... now dot crawl and ula snow - though these are not the ...
    Roger Jowett Roger Jowett September 2010 Emulators
  • Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…

    ... :

    Read data/write register port 65533
    Write data ... port 49149

    Register 14:

    0 AUX ... />
    NOTE: The above RS232 register description from page 322 of ...
    ASM ASM October 2010 Hardware
  • Loading screens hidden messages[url]http://equ.in/ox/spectrum/eggs/screens.php#arkanoid2[/url] scroll over the pics!

    [url]http://equ.in/ox/spectrum/eggs/screens.php#arkanoid2[/url]

    scroll over the pics!
    MuZiKiLL MuZiKiLL October 2010 Sinclair Miscellaneous
  • Weird Spectaculator problemI thought I'd post this here first rather than emailing Jon directly in case there's a simple known answer to this issue. I've recently transferred …

    ... name and serial number to register, which the programme recognises.
    register again.

    The 30 ...
    thehod thehod October 2010 Emulators
  • Best tools, oscilloscope for ZX Spectrum repairHi, Since I'm a newbie in this area, I'd like to ask about the most appropriate tools for ZX Spectrum repair. For example I'd like to purchase an a…

    ... /> Here's what I found - scroll to bottom of that page ...
    ZXMrk ZXMrk October 2010 Hardware
  • 48k Rubber Keys + Bits and BobsNow my pristine 128k has gone, I'm selling all the other bits and bobs left over. As this is a dedicated Speccy site, you lot get first dibs, anyth…

    ... half the keys don't register with the "LOAD" button being ...
    drevans drevans November 2010 Sales
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... need about 100 bytes for register data and executer code, it ...
    Arda Arda November 2010 Sinclair Miscellaneous
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  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
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