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<1…14151617181920…34>
  • Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …

    ... guess. The LTP is slow in any circumstance.
    The ... this can be acheived in very much the same ... a line out and no ear.
    However this is ... reading data from your chosen port. I can only foresee ... extra overheads.

    In short a file transfer client ...
    cyborg cyborg November 2001 Games
  • Original rubber key 48k'sThis question is to some point academic; But i seem to remeber the original 48k Rubber Keys Speccy came in versions 1,2 & 3! (way back when, occasi…

    ... to blow up
    in response to sudden voltage fluctuations ... input port also reads in a value from the EAR socket ... result is that the EAR bit now floats until ... is nearer the expansion port and appears as a ... through the rear expansion port when you turn the ...
    Mike Jeanes Mike Jeanes July 2001 Sinclair Miscellaneous
  • WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…

    Bit 6 of IN-port FE is the ear input bit. The ... value read from this port is ... as read by an IN from port FE. The difference between ... of high output level on port 254:

    ... the keyboard and a joystick port (e.g. Kempston), ...
    Dr BEEP Dr BEEP November 2001 Sales
  • Now here's an idea...I don't know if anyone's thought of this before, if they have then I ain't heard of it. How about putting all the electronics required for a kickass …

    ... that or stick a GBA in there with a TV adapter ... the access port on the casing normally reserved for ear). RGB output ...
    AndyHerbert AndyHerbert July 2002 Emulators
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... - if reset EPROM is in place, else ports 7FFD and ... which portion of RAM00 is in place.
    It ... colour mode (4x320x200x256 quarters in each chip with a ... ear/mic being for tape. Also stereo TV output.
    MIDI port ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • basil the great mouse detectivehello i have a small problem with this game.when i have completed level 1,spectaculator 6.0 tries to find level 2.it find it,but it does not load it…

    ... />
    Given that the EAR bit on port $FE can be either ... *should* we be emulating it? In a TZX, you can only ... stream the bits in and flip when you reach ... TZX block should have the EAR bit set to low when ...
    Dunny Dunny March 2004 MIA/STP/SDP
  • basil the great mouse detectivehello i have a small problem with this game.when i have completed level 1,spectaculator 6.0 tries to find level 2.it find it,but it does not load it…

    ... this is implemented as ear=1 and ear=0 respectively or the ... an option whether 'low' on EAR is 0 or 1 :o ... ]
    Given that the EAR bit on port $FE can be either ... not implement this 'pause' feature in the right way.
    Mikie Mikie March 2004 MIA/STP/SDP
  • CHROME: a new ZX model! :)Probably You know already about 'last days news', but well... ;) Such informations are so important that I'll put it here: here is a news about n…

    ... via jumper or i/o port

    >For what ... have any ear/mic ports)?
    --------
    Yes, tape in/out works ... ? (for instance: is it possible in games to
    >press ...
    Yerz Yerz April 2004 Sinclair Miscellaneous
  • COVOX works?My Sprinter "simulates" a COVOX soundcard at port 4Fh, but I don't know how to use it! Can anyone explain to me the process of programming it? (To be…

    ... sounds by sending values to port where COVOX is sitting...< ... 1 to bit 4 at port 254
    wait a ... 0 to bit 4 at port 254
    wait a ... covox:
    write 128 to port where is covox
    wait ... linear scale but human ear recognize sound in logaritmic way (or ...
    Fikee Fikee May 2004 Development
  • Spectrum programmingI have a Spectrum+ at home. I tried to write some programs in BASIC (IIRC i wrote a breakout clone in which you had to hit those spider-like characte…

    ... know how things are arranged in spectrum. F.e. where ... is obvious (each bit in the byte representing a pixel ... used?[/quote]

    Via port FE, I cannot recall the ... bit 3 and 4 (for ear and mic) as bits 0 ... bits at a certain frequency in order to produce a ...
    cyborg cyborg January 2005 Development
  • IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…

    ... /> You are treating all port reads with bit 0 as ... if they're reading from port FE?
    [/quote]
    ... only make this check for port FE.

    Well ... from port +7FFE
    IN A,(+FE) i.e. BREAK and EAR< ... based on EAR everytime there is an IN from FE ...
    Unique Unique March 2005 Emulators
  • IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…

    ... /reset based on EAR everytime there is an IN from FE no ... /> [/quote]

    No bits in the high byte of the ... provides the result for all port reads with bit 0 of ... bit 6 of all ULA port reads. With no tape input ...
    Woody Woody March 2005 Emulators
  • TZX formatQuick question: What is the current pulse level at the start of a TZX file? Difficult question: Why does the format say that the final pulse shoul…

    ... 1 memory contentions occurring in the ROM code between ... applies to tape timings in general: we usually desume ... machine code routines, but in fact these values float ... writing to the MIC port but we don't ... impulse response of the EAR circuitry which can be ...
    Luca Luca March 2005 Development
  • Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…

    ... . The components were disposed in a different way, nothing ... with the original PCBs used in Sinclair Spectrum + computers. ... Between the EAR/MIC connectors and the expansion port there's ... the only difference consisting in having the messages in Spanish.
    ...
    na_th_an na_th_an June 2005 Sinclair Miscellaneous
  • Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…

    There's some more info (in spanish) in the news:

    [url ... /> Addresses ending in #FE form a mask applied to ULA port #FE ... , so if you write a 0 in those ... to the port. The ULA may also mix both EAR and MIC ...
    Metalbrain Metalbrain June 2005 Sinclair Miscellaneous
  • Emulation Feedback** Extended RTM sessions could over-tax the CPU.

    ... from IN $FE, that variable is used to build the EAR ... the state of the line in on your soundcard every ... the signal coming in to the EAR bit of port $FE.
    ... far each from other even in Spin.
    [/quote]
    ... it wrong. You're in no position to tell me ...
    Dunny Dunny October 2005 Emulators
  • Speccy + issues?There was a topic somewhere regarding the different issues of the Spectrum keyboard and how it had some subtle effects on programs. Just wondering …

    ... in version of ULA chip and some voltage levels by detecting EAR ... input - it is on same 8-bit port as ... it expects some values on port 254, and it came not ...
    piters piters November 2005 Hardware
  • How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…

    ... by far the most time in a loader is spent waiting ... to appear on the EAR bit of port $FE. In the main, loaders ... . When the status of the EAR bit changes, the size of ...
    Dunny Dunny May 2006 Emulators
  • What would you pay for a brand new Spectrum?I wanted to know if there was a market for new hardware, like the DTV-64.

    In my sig you see what ... @ 3.5/21MHz 4MB RAM in an AT form factor[/I ... [/B] (with option to shove in an IDE disk, for example ... , etc)
    [*]An EAR and a Line-In connector for connecting my ... /Sinclair[/B] definable dual joystick port
    [*][B]Rubber keys[/B ...
    Marcelo Marcelo August 2006 Hardware
  • Plug in the TV Joystick Games Thingys (Spectrum one??)I brought a from a car boot one of those plug in the TV joystick games thingys for a pound. This one happened to be full with 20 or so Commodore 64…

    ... hacked to add a cartridge port; portable console nutter Ben Heckendorn ... game can have a cartridge port connected so you can play ... your own 2600 games. In fact, the designer has put ... add joystick ports, keyboard input, ear/mic sockets etc.
    StuBruise StuBruise August 2006 Sinclair Miscellaneous
  • EightyOne 0.43Hmmm, 'twas round about July I fell asleep and only came round t'other day - honest gov! Anyway, I thought I'd better whip out a quick release and p…

    ... of 'EAR' hardware and the bear it's been to port software ... /> You asked me about that in SPIN a few months ago ...
    Dunny Dunny December 2006 Emulators
  • Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …

    ... from memory here) to read in port 254 bits (as one controls ... the border colour) , as in the same way (maybe) the ... do an IN on port 254, bit 6 is the EAR input and ...
    gasman gasman April 2007 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... does output sound through the Ear socket, it has to as ... sound output via the RGB port, so folk with monitors have ... to connect to the EAR to get any sound at ... take milliseconds, found a site in google cache that talks about ...
    Womble Womble July 2007 Hardware
  • PC TFT and Spectrum TVCan anybody recommend one of these? So I want it for dual purposes, plug a normal VGA PC into it and also have an aerial in for the spectrum? Portab…

    ... it into a standard VGA port on a TFT?

    IN/OUT EAR/MIC no problem.
    carlinski carlinski September 2007 Hardware
  • Soldering Iron Fun - 48k Composite Video ModYay, I bought a temperature controlled soldering iron and associated gubbins yesterday and have had a practise go at Womble's documented [URL="http:/…

    ... i totally submerge the board in isopropyl alcohol and rub with ... a brush in order to remove this shitty ... way to make the expansion port's contacts shiny and new ... that involves soldering iron and ear cleaning tips, works great!!
    gtsamour gtsamour May 2008 Hardware
  • 48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…

    ... border colors, etc.)
    -Fix port 255 issue
    -Fix sound ... on previous models)
    -Add ear input to the back of ... since the sound is included in the +2A monitor socket.
    in 1982 and still haven't ...
    thingley thingley June 2008 Games
  • Fuller Sound box faulty for the Zx SpectrumBit of a long shot, but anybody got schematics for the fuller sound box, mine works apart from the ear socket, can't load games thr' the supplied ear…

    ... instructions on WoS (page 7 in particular) it seems to have ... /> It also has a built-in amplifier, but I'm not ... the Spectrum's EAR/MIC or actually monitors port 254 activity on ...
    Jimmy Jimmy April 2009 Hardware
  • RGB-Output (interface) for rubber 48k / Spectrum+I wonder if there is interest for a small RGB-interface for the rubber 48 k / Spectrum+. I developed a schematic using a very small number of parts.…

    ... SCART too (can the ear/mic socket be used ... would need a throughput port or a joystick interface ... a Kempston compatible dual-port joystick interface, which was ... I had the three-port interface that did both ... Kempston/Cursor port, that I got in exchange for ...
    joefish joefish April 2009 Hardware
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... . When you OUT on port 254, I know the ... are for MIC and EAR, and EAR also controls the speaker ... Hardware[/URL]
    But in emulators, alternating either bit ... there was a difference in volume, was this ever ... exploited in music? And which should ...
    joefish joefish April 2009 Development
  • Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …

    ... net/Games.aspx#L12]Smiler in Arrowe Land[/url] has ... to fix the glaring mistakes in levels 2 & 3 ... bits from the I/O port, always changing it to ... I ever write another title in this system, I'll ... sound routines in assembler. I tend to only toggle the ear bit ...
    Digital Prawn Digital Prawn February 2010 Games
<1…14151617181920…34>

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