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Search Again :: Adv Search 1000 results in 0.088s
<1234567…34>
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... use a Kempston joystick's fire button to start a ... make arbitrary data appear on IN 31 from the screen RAM.< ... disconnected, and I read IN 31 while the ULA is still ... a short interrupt routine in IM2 to make sure of ... is connected, and I read IN 31, can I be sure ...
    ajmoss ajmoss April 2010 Hardware
  • Chuckie Egg and joypads on the SpectrumAn old favourite of mine is "Chuckie Egg", but it has no joystick option. I've got a dual port DK Troniks interface, the first port takes IN 31(Kemps…

    ... interface, the first port takes IN 31(Kempston) and the second uses ... number keys as directions and fire. Since Chuckie Egg has a ... 9. What is the point in that? Does anyone know how ...
    Spector Spector March 2002 Games
  • OUT to file, IN from fileOUT - sentences won't do much on emulators since they mostly communicate with external devices. If there was an emulator that would write the (last) …

    ... and read the (last) IN-ed value, then someone could ... was OUT-ed and in another WINDOW-program you ... 31.IN and the emulator would read the value with LET A=IN 31 ... .

    In this way your ... hardware.

    In my case I could test ...
    Dr BEEP Dr BEEP August 2002 Emulators
  • Fire Ruby - More HelpI cant pass the spikes in the fire ruby by lawrence creighton, can someone please help? [ This Message was edited by: welsh_brawler on 2003-08-08 21…

    I cant pass the spikes in the fire ruby by lawrence creighton, can someone please help?

    [ This Message was edited by: welsh_brawler on 2003-08-08 21:22 ]
    welsh_brawler welsh_brawler August 2003 Games
  • Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …

    ... been playing with the idea in the games I'm currently ... been selected you can hold FIRE down to start the game ... /> After testing the results of IN 31 when a Kempston joystick isn ...
    bobs bobs January 2008 Development
  • Help i'm on fire.so i voluntered for a course at work cos a girl i like was doing it, and she asked me to go with her. It was learning about fire safety in the work p…

    ... her. It was learning about fire safety in the work place, etc ... annual talks to staff about fire regs and health and ... like one of those guys in a high vis jacket ... people that the biggest killer in a fire is ignorance. i'm ... told them to fight fire with fire.
    mile mile May 2008 Chit chat
  • SEGA GENESIS joypad from Ebay[IMG]http://velesoft.speccy.cz/zx/joypad/IMGP9641.JPG[/IMG] On Ebay is possible buy very cheap chinesse joypad compatible with Sega Genesis / Sega M…

    ... sega genesis joypads with 8 fire buttons)

    ... kempston joystick with two fire buttons (usable buttons B ... D3 = right
    D4 = fire 1 (button B)
    D5 ... = fire 2 (button C)
    D6 ... readable from joypad:
    IN 31 = 0,0,button C ...
    velesoft velesoft June 2014 Hardware
  • +2A/Kempston interface incompatibility?Hello forum,<br><br>So, I used to be active here about eighteen months ago.&nbsp; I liked messing about with turboloaders.&nbsp; Then I disappeared b…

    ... -Interface

    Nada.  PRINT IN 31 just returns zero.  (Well, it ... to moving right and pressing fire, which as I understand it ...
    stephenw32768 stephenw32768 May 2015 Hardware
  • Noob's guide to joysticksWhy on earth would I be asking this *now*, I hear you all scream? The answer... curiosity. Back in the day all I ever had was a +2 and Sinclair's …

    ... worked - with the IN 31 function. As I never ... /> LET x=x+(IN 31=*value1*)-(IN 31=*value2*) where *value1* ... values for left, right and fire.

    ... Kempston would be with IN 31 or have I ... does putting "timedata joystick" in quotes and getting one hit ...
    The Mighty Dopethrone The Mighty Dopethrone November 2016 Hardware
  • Kempston Interface To Work On 128K +2a ( HELP )Hi need some Advise I'am trying to play games on a 128K +2a Using a (Kempston Interface +3) but it will not work (WHY) , do you need to setup or so…

    Plug your Kempston interface into +3, switch the computer on, and type:
    10 print at 0,0;in 31;" ":go to 10
    and Run it.
    If you move stick or press fire, the values on screen should change. If it does so the interface works well.
    LCD LCD February 2003 Sinclair Miscellaneous
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    ... the joystick (Kempston for instance) in BASIC routines?
    < ... ) Pokes to get cool stripes in Borders.

    IN 31" and it'll give ... pushed, with or without the fire button.

    ... compiler, (and sometimes in BASIC) you can get ...
    chaosmongers chaosmongers April 2005 Development
  • New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…

    ... , right, down, up and fire, respectively) and Joystick 2 is ... can be read with IN 61438 and IN 63486, respectively.
    ... and fire, respectively).
    * Kempston Joystick can be read in port 31: IN 31 ... printed out is contained in ROM starting at address ...
    na_th_an na_th_an April 2005 Development
  • IN for KempstonHi all A few years ago I wrote a Spectrum program that used graphics on screen to indicate what position a Joystick was in. I need the read IN instru…

    ... to know

    IN 31 Kempston
    IN 63486 Sinclair Joy 2 ... br />

    Left 5 IN 63486 BIT 4 (16) Down ... 6 IN 61438 BIT 4 (16)
    Right 8 IN 61438 BIT 2 (4) Fire 5 IN 61438 BIT 0 ... (1)
    Up 7 IN 61438 ...
    swift240 swift240 June 2007 Hardware
  • Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …

    ... right button
    D6- joy FIRE 3 / middle button
    D7 ... middle button
    D6- joy FIRE 2 / right button
    D7 ... :
    - push LEFT button - IN 31 return JOY(A-MOUSE) or ... /> at bit 4(fire=start game) on port 31)
    - push ...
    velesoft velesoft April 2008 Hardware
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... disconnected, and I read IN 31 while the ULA is still ... is connected, and I read IN 31, can I be sure ... . Also more than one fire button can be connect on ... possible:
    - read port 31 after HALT instruction (or at ... D4 are both in 0
    If IN 31 return on bits ...
    velesoft velesoft April 2010 Hardware
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... with interrupts

    IN 31 ; read joystick port
    ... AND 31 ; mask bits 7-5
    CP 16 ; fire button ... will normally give
    (IN 31) AND 31 = 31

    which ... game-starting condition:
    (IN 31) AND 31 = 16

    ajmoss ajmoss April 2010 Hardware
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... with interrupts

    IN 31 ; read joystick port
    ... AND 31 ; mask bits 7-5
    CP 16 ; fire button ... will normally give
    (IN 31) AND 31 = 31

    which ... game-starting condition:
    (IN 31) AND 31 = 16

    velesoft velesoft April 2010 Hardware
  • Joystick interfaceHi everyone. I am back and i could not be happyer. Done my AS and got A in maths + futher maths Anyway, how do i use a joystick interface. As in h…

    ... generates keypresses.

    Joystick in port 1 generates 6 for ... up, and 0 for fire.
    Joystick in port 2 generates 1 ... for up, and 5 for fire.

    Kempston Joystick isn ... to read from port 31 (LET a = IN 31), and check the value ...
    na_th_an na_th_an September 2010 Development
  • Joystick interfaceHi everyone. I am back and i could not be happyer. Done my AS and got A in maths + futher maths Anyway, how do i use a joystick interface. As in h…

    ... /> 20 LET fire=0: LET kj=IN 31: REM note: reset fire event every ... LET kj=kj-16: LET fire=1: REM Check if firing ... LET kj=kj-16: LET fire=1: REM Check if ... kj=16 OR fire THEN BORDER 2: REM fire by itself or ... br /> 90 IF fire THEN BORDER 2: REM fire by itself or ...
    Jonathan Harston Jonathan Harston September 2010 Development
  • 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:/…

    ... unstable, absent pull-up resistor in joystick connector

    ... br />
    - kempston port 31 decoder use uncomplette adressation (IORQ ... /> D3 = up
    D4 = fire

    + will work on ... floating bus value. PRINT IN 31 not return clear values of ...
    velesoft velesoft August 2011 Hardware
  • Problem with DIY Kempston Joystick InterfaceHello, Decided to try out Yarek's Kempston joystick interface: [img]http://8bit.yarek.pl/hardware/zx.joystick/kjschem.gif[/img] Having a few issues.…

    ... and acts as like the fire button is held down ... needed for 74HCTxxx chips. In this design there should be ... logic level and two extra fire inputs for the few ... levels.

    Keep in mind that this design does ... /> 20 PRINT AT 5,5; IN 31;" ";
    30 GO TO ...
    1024MAK 1024MAK April 2013 Hardware
  • 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…

    ... you've just programmed in an IN 31 in machine code, the high ... the one you have plugged in.[/QUOTE]
    I meant ... if two were plugged in then they would both respond ... to wait for any fire button to be pressed ... build a prototype interface in a couple of days ...
    guesser guesser April 2013 Hardware
  • 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…

    ... it. You would use IN 31 to read them, but ... could detect anyone pressing FIRE with just one read.
    Then you could plug in 8 joysticks, or you could ... operates Up/Down/Left/Right/Fire on one port, and ... At least, being based on IN 31, it would work on a ...
    joefish joefish June 2013 Hardware
  • 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…

    ... it. You would use IN 31 to read them, but ... could detect anyone pressing FIRE with just one read.
    Then you could plug in 8 joysticks, or you could ... operates Up/Down/Left/Right/Fire on one port, and ... At least, being based on IN 31, it would work on a ...
    Hood Hood June 2013 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... few questions:

    In the second sketch, I'd ... for Up/Down/Left/Right/Fire bits. So why is ... byte? I've always seen IN 31 return 0, not 32, ... (lazy style, one IN 31 and one IN 55), one chip could ...
    But anyway, I picked IN 55 as an alternative so ...
    joefish joefish January 2014 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... for Up/Down/Left/Right/Fire bits. So why is ... byte? I've always seen IN 31 return 0, not 32, ... , then you can have three fire buttons :wink:

    ... they were so lazy in not doing full decoding...[/ ... (lazy style, one IN 31 and one IN 55), one chip could ...
    1024MAK 1024MAK January 2014 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... line with an IN 31, and another with an IN 55. So ...
    As for extra fire buttons, that's getting a ... all trigger a second fire button one bit higher ... alternative to a second fire button in your code. At the ... with adding a second fire button? What do people ...
    joefish joefish January 2014 Hardware
  • 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…

    ... online that allow for 2 fire buttons the standard seems to ... the 4 direction buttons + the fire button mapped to the lower ... just do normal kempston style IN 31 commands.

    If ... attached

    The first IN 31 executed would receive the data ...
    Basher Basher April 2014 Hardware
  • Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …

    ... :

    10 LET A=IN 31
    20 PRINT AT 5 ... /> Joystick right prints 1
    Fire button pressed prints 16
    1024MAK 1024MAK August 2014 Hardware
  • Arcade Stick SuggestionsHello, everyone. As some of you know, I am working on a "Let's Play" series for ZX Spectrum games (I've already recorded the video footage for the pi…

    ... own joystick interface to use IN-31 and IN-55. Some guys have ... built interfaces that can read extra 'FIRE ... line switchable between FIRE-2 and +5V, just in case the joystick ... .g. with IN-31, and assume it's a secondary fire button. As ...
    joefish joefish September 2014 Hardware
<1234567…34>

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