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Search Again :: Adv Search 1000 results in 0.059s
<1…19202122232425…34>
  • Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…

    ... t-states

    ;; bit 6
    srl d ; MSB to ... />
    ;; 3. emit stop bit
    ld a,0xfe ; load ... with stop bit | 7 t-states
    inc hl ; 6 t-states ... /> ;; what about stop bit duration?
    ;; sending start bit takes 31 t ...
    tstih tstih May 2011 Development
  • Question about divide +Hi A friend has sent my a faultly divide + to see if I can repair it. If I use this divide+ with a spectrum 48K (That works perfectly with my stand…

    ... through edge connector. As data protection (for possibility connect ... />
    Unstable vector on data bus is not bug of external ... hardware. This is unstable data bus in ZX Spectrum. Fix ... 2) fix vector value on data bus. Always return value #FF for ...
    velesoft velesoft May 2011 Hardware
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... reset time, the address and data bus goto a high-impedance state ...
    Stefano Stefano June 2011 Emulators
  • Port 254 emulation problem. Help, please ...Sorry, but my english is not pepfect. I have a problem and need in professional help. I have developed hard-soft emulator of ZX Spectrum 48. The link…

    ... to all ports with low bit reset
    {
    result = value ... to 1; //always set
    bit 6 set to the appropriate ear_bit ...
    Arjun Arjun June 2011 Emulators
  • general beginner queriesHi, I bought myself recently a +3 and a devide extension. I was not in touch before with the speccy, but I am really surprised and delighted about th…

    ... that it fix the "floating bus"-issue which can crash some ... + autofire)
    - fix stability of data bus with IM2 vector
    - enable ...
    velesoft velesoft July 2011 Hardware
  • general beginner queriesHi, I bought myself recently a +3 and a devide extension. I was not in touch before with the speccy, but I am really surprised and delighted about th…

    ... supply works OK. ZX-bus: a bit worse here, but some problems ...
    Yerzmyey Yerzmyey July 2011 Hardware
  • NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…

    ... full 8bit value
    - connect data bus between S-KEMPSTON and ZX ... BUS via smd resistors 100 Ohm< ...
    velesoft velesoft August 2011 Hardware
  • NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…

    ... for coupling the data bus of a peripheral to the data bus of the ... computer? Isn't supposed that the data bus drivers ... for a device that accepts data from the computer, those ... for a device that outputs data to the computer... are they ...
    mcleod_ideafix mcleod_ideafix August 2011 Hardware
  • NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…

    ... for coupling the data bus of a peripheral to the data bus of the ... computer? Isn't supposed that the data bus drivers ... ]

    Resistors on data bus can be used as protection ... can use same ports and data bus collision can be eliminated ...
    velesoft velesoft August 2011 Hardware
  • NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…

    ... full 8bit)

    - connect data bus between S-KEMPSTON and ZX ... BUS via smd resistors 100 Ohm - ...
    lotharek lotharek August 2011 Hardware
  • NEW KEMPSTON interface for ZXHi. Lotharek has released a new KEMPSTON interface for people who doesn't need AY on-board and want to have some really small device. [url]http:/…

    ... full 8bit)

    - connect data bus between S-KEMPSTON and ZX ... BUS via smd resistors 100 Ohm - ...
    velesoft velesoft August 2011 Hardware
  • Emulation of ZX Spectrum 128+2 (grey)Please read this thread: [url]http://www.worldofspectrum.org/forums/showthread.php?t=35523[/url] result: exist 3 (or more) versions of grey ZX Spect…

    ... 0x7ffd returns the floating bus value, so with some ... IN 7FFD is fast and data bus contain #FF (pull-up ... - if ula read videoram data and CPU use IN 7FFD ... CPU continue in reading but data bus contain #FF (pull-up).< ... port and read floating bus (if ula show border ...
    velesoft velesoft August 2011 Emulators
  • Empire! Help neededCan anyone convert the listing in the Tipshop to Multiface pokes? Im having a hard time with this game, over 15 years playing it, now I could do wit…

    ... incorrectly, presumably because of a data bus discrepancy between the 48k & ...
    Battle Bunny Battle Bunny September 2011 Games
  • 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?

    ... ld e,128
    bit 0,d
    call ... ld e,2
    bit 6,d
    call nz,setBit ... /> dec e
    bit 7,d
    call ...
    Kilby Kilby October 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?

    ... I]circular[/I] (the same bit that goes out, comes in ... as the extra bit that brings the new bit in and ... also takes the old bit that goes out.
    ... so the sign bit (7) is extended to bit 6, and also keeps ... a 0 in the rightmost bit (0), and the arithmetic ...
    Metalbrain Metalbrain October 2011 Development
  • Help with custom loader neededAs people here became active recently about MakeTzx and tzx format in general, I have thought that I would post it here. I have some .wav recordings…

    ... will come from the data pulses, some from the ... for the leader and data. To find the start ... start of the data. The regular data pattern should follow ... the leader ends and the data starts, again create histograms ... for the data, one for bit 0 and one for bit 1. ...
    Patrik Rak Patrik Rak October 2011 Emulators
  • which zx-spectrum games uses 1bit sound samples?hi! I'm looking for zx-spectrum games using 1bit sound samples. Compairing with msx, which has far less games available than zx-spectrum, there are f…

    ... byte containing four 2-bit samples (bit 7/6 high/low of first ... /> nop 4

    loop1 bit 6,c 8 45 cycles
    dec hl 6
    nop 4

    loop2 bit 4,c ... /> dec hl 6
    nop 4

    loop3 bit 2,c ...
    PrinceGaz PrinceGaz October 2011 Games
  • Classics ported or cloned on good ol' SpeccyHi, Spectrumists! I'm a fan of classic arcade games and I would like to know from you what do you think about ports or clones of such games on the S…

    ... +3 allram mode - collide on data bus)
    . If you in rom ... ram pages with selectable writeprotect) - data from 16384-32767 can be ...
    velesoft velesoft November 2011 Games
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... RAM putting stuff on the data bus when it shouldn't) and ... there being signals on the data bus. Normally at these times /CAS ... and these coincide with data on the data bus lines and low going ... are odd signals on the data bus lines (square waves going between ...
    Zorn Zorn November 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... and these coincide with data on the data bus lines and low going ...
    mcleod_ideafix mcleod_ideafix November 2011 Hardware
  • Arkanoid Hack - Your Sinclair Smash TipsRemember that Arkanoid hack in YS Smash Tips that didn't work? It does now... [CODE] 10 REM ARKANOID HACK 20 CLEAR 65535: LET C=1: LET D=23295 …

    ... ,128,33,87,224,6,6
    130 DATA 197,221,78,0 ... ,221,35,6,0
    140 DATA 197,229,17 ... 250,1,0
    220 DATA 6,237,176,33,126,128 ... 230,31
    350 DATA 40,8,6,0,31,56,18 ... 230
    370 DATA 31,40,48,6,10,31,5,48 ...
    380 DATA 252,120 ...
    jp jp December 2011 Development
  • joining lines of BASICDue to overwhelming demand - well, one demand - well, more of a suggestion, really - here's a routine to join together lines of BASIC. The vertical c…

    ... FLAGX for extra info:
    * Bit 6 is set to indicate "really ... has been pressed), as the bit 5 edit flag used by ...
    Battle Bunny Battle Bunny February 2012 Sinclair Basic
  • SpecEmu 3.0Has anyone else noticed that Woody's released a version 3.0 of SpecEmu? Nope? Just me then... :D

    ... -neutral state. Could setting the EAR bit and switching apps be enough ...
    obo obo February 2012 Emulators
  • Which kempston joystick schematic is the best?I'm looking for the best Kempston Joystick interface schematic. It has to be as cheap as possible. But it must be as compatible as possible. I've c…

    ... better use resistors on data bus (elimination of data collision with other devices ... .

    Some games need data D7-D5 on port #1F ... -D5=part of floating data bus, D4-D0=joystick data)

    Also ...
    velesoft velesoft February 2012 Hardware
  • Picking apart spectrum screensDear all, Being a fan of remakes, I'm constantly trying to pick apart spectrum game screens to see how they're made up - how many characters one pla…

    ... inc hl
    NEXTSET:set 6,(hl)
    inc hl
    jr nz,NEXTBC
    bit 6,(ix+1)
    jr nz ... /> SETRES: set 6,(ix+1)
    res 6,(ix+4)
    RESSET: res 6,(ix+1)
    set 6,(ix+4)
    Battle Bunny Battle Bunny February 2012 Sinclair Miscellaneous
  • MB02 picsI got an original MB02 from someone to fix, and of course I made some pics to share (click for magnification): [URL="http://benophetinternet.nl/hobb…

    ... has the only control about data bus

    4. check in ... this mode all data, adress and control bus lines with an ...
    ingo ingo February 2012 Hardware
  • MB02 picsI got an original MB02 from someone to fix, and of course I made some pics to share (click for magnification): [URL="http://benophetinternet.nl/hobb…

    ... ?

    looking at the data bus you should see high and ...
    ingo ingo February 2012 Hardware
  • Occasional noise over RGB on +2AHi all I have a +2A that is misbehaving at the moment. I'm using the RGB to SCART lead (which incedentally is great on my +3) The problem is, the …

    If it's not a TV issue then looking at the way the picture is corrupted I'd be looking for possibly shorts on the data bus to the contended ram chips. (between IC1 and IC3/IC4)
    guesser guesser February 2012 Hardware
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