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<1…15161718192021…34>
  • AY programming and notes frequencyHello everybody, I'm Targhan from the french CPC group Arkos, perhaps you've heard of us. I'm currently working on a music tool and I'd like to k…

    ... for the 12 bits frequency register), I get the period 3390 ...
    Targhan Targhan November 2009 Development
  • Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…

    ... bit by using the alternative register bank instead (something in my ...
    RoseCotton RoseCotton November 2009 Development
  • TracFone Mobile Phone for $8Maybe this thread is one for out US ex pats. As I visit the US a lot I have brought myself an American pay as you go mobile phone. It was an imulse…

    ... terminated and you must re-register your phone with a new ...
    Scottie_uk Scottie_uk December 2009 Chit chat
  • Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…

    ... , is probably worth setting a register for for maximised speed.
    Gedlion Gedlion February 2010 Development
  • I am spamming my Online Football Game. New season starting soon.Xpert Eleven, a free online football management game. Not very complicated, easy to pick up, but very difficult to master. Free to join and play. New…

    ... .
    * It's free to register and play.

    Sign ...
    thx1138 thx1138 February 2010 Chit chat
  • Miles Gordon Technology (MGT) Companies House documents online - plenty of info!Heya, I've photographed the microfiches of MGT's company documents from Companies House (provided courtesy of Chris Smith) and have put them all up …

    ... .3M)

    Location of register of members changed - Jun '89 ...
    NickH NickH February 2010 Sinclair Miscellaneous
  • JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …

    ... execution timings
    - MEMPTR internal register emulation
    - Contended-memory emulation ...
    jpablo jpablo March 2010 Emulators
  • Need help with small asm piece of codeI could use some help. I have a number in A register. It can be 1,2,4 or 8 (always only one bit is set) I need to make number transformation: 1 ->…

    ... have a number in A register. It can be 1,2 ...
    Ralf Ralf March 2010 Development
  • New Game and HelloHi All, Long, long time lurker and contributor (hardware index, PiMan files etc..) but having been quiet for a few years I thought I might register. …

    ... years I thought I might register.

    Not only that ...
    Paul-J Paul-J April 2010 Development
  • Hi, Spectrum, games and accessories on ebayHi ive been reading with interest the forums and thought i would register and show you my items. If anyone is interested let me know, or if your int…

    ... forums and thought i would register and show you my items ...
    Mason Mason April 2010 Sales
  • 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
  • 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
  • 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
  • pasmo and rept macrosHi, I'm delving back into speccy coding again (and trying to remember Z80 along the way) and I'm trying to figure out how to use a variable in a rep…

    ... /> rept 8
    ld a,(ix+times_around_compilation_loop)
    ld de,a ...
    sack sack July 2010 Development
  • 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
  • Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …

    ... :
    [code] di
    ld ix, source
    ld hl, dest ... />
    start:
    ld sp, ix ; 10 T
    pop bc ... Subtotal = 54

    add ix, de ; 15
    add hl ...
    ajmoss ajmoss August 2010 Development
  • 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
  • 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
  • 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
  • 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
  • Nibble SwapHi, I want to swap around the nibbles in a byte pointed to by the IX reg, this works: [CODE] LD A,(IX+5) AND %11110000 RRA …

    ... byte pointed to by the IX reg, this works:

    [CODE]
    LD A,(IX+5)
    AND %11110000
    ld A,(IX+5)
    and %00001111
    spud spud October 2010 Development
  • 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
  • Spectrum 48k - Rubber Keys + PSU + Books[B][COLOR="Red"]SOLD[/COLOR][/B] Starting a new thread specifically for this mini-bundle. Unfortunately the previous sale fell through as the postal …

    ... half the keys don't register with the "LOAD" button being ...
    drevans drevans November 2010 Sales
<1…15161718192021…34>

Latest Posts

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