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Search Again :: Adv Search 1000 results in 0.095s
<1234567…34>
  • 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…

    ... does this:

    Sets bit 6 of the result to 0 ... the address is 0 then bit 6 is set based on ... the opening copyright text until bit 6 of result is 0.
    bit of the final byte ... something about OUT FE affected bit 6, is this what I'm ...
    Unique Unique March 2005 Emulators
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    ... Key input while checking IN xxxxx value's. Without ... difference in bit 6.
    [code]
    IN: Reads keys (bit 0 to bit ... is some key response in the running Ted's ... let ii= IN 63468
    7010 IF IN 65022=ii-2 ... ]
    7000 LET ii=IN 65022: LET ii=ii-32 ...
    ub880d ub880d November 2012 Sinclair Basic
  • Spectrum Playbasic EMULATORHi, Im new to the site and im writting a spectrum emulator in Playbasic :-o Its halfway complete. But i need help with emulating sound!? Anyone care…

    ... mo i dont know which bit to check for a 1 ... , but... iirc, it's bit 7 for ear and bit 6 for mic.
    Dunny Dunny November 2012 Emulators
  • [NEW]: Spectaculator 6.0Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…

    ...

    What's new in version 6.0
    -------------------------

    4-channel 8-bit digital stereo sound). There are ... border is now correctly rendered in 24-bit
    windowed modes. ... a free copy of version 6.0. You should
    Jon Needle Jon Needle December 2003 Emulators
  • Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…

    ... of how variables are stored in memory.

    ... an old scanned speccy book in the WoS archive.
    in 128K mode).
    < ... this program to run correctly in 128K mode.

    BIT 6,A
    JR Z, ...
    Digital Prawn Digital Prawn March 2008 Development
  • Broken keyboard due to broken ULARecalling csmith's thread about dead ULAs, a thread appeared in the Zonadepruebas (Spanish) forum regarding... a dead ULA, but only a partially dead …

    ... dead ULAs, a thread appeared in the Zonadepruebas (Spanish) forum ... with reading bit 6 from port 254, which is the EAR bit.
    < ... Apparently, the only failure is in the 5 least significant bits ... the five keyboard pins "in the air". In the photo we can ...
    Winston Winston October 2010 Hardware
  • Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …

    ... bit terse :))

    I got a Issue 6 48K machine in ... corruption, it always affected bit 4 of the byte, ... IMG]

    In this case certain pieces of ... up masking the failure in bit 4 by generating values ... that were 0 in that location in the faulty areas ...
    balford balford September 2014 Hardware
  • Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…

    ... format is described well in the techinfo.doc that ... file support is noted in a doc file. This ... found during the emulation:
    bit 0: =1 means code, ... 1 means byte reading
    bit 2: =1 means word ... 1 means stack reading
    bit 6: =1 means stack writing< ...
    clausjahn clausjahn July 2015 Emulators
  • Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…

    ... />
    1) EAR input is a bit input (bit 6 reading the fffe ... sound to EAR input? Would it still scream in agony?
    EAR and try to read it ... br />
    4) Is EAR port always reading? I.e ... How sensitive to change is EAR? Does it take time ...
    tstih tstih April 2017 Development
  • 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 ... 2 is value of bit 6 read by IN 254 after the appropriate ... reset will give a reset bit 6 from IN 254.
    On an ... .doc) is that PRINT IN 254 gives bit 6 reset on an Issue ...
    Dr BEEP Dr BEEP November 2001 Sales
  • 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 …

    ... 5, and RAM 4,6 or 7 in the other two slots ... which portion of RAM00 is in place.
    It needs ... modes are enabled.
    If bit 6 is ser 256 colour mode ... Maximum possbilities.
    Dedicated ear and ear/mic, ear having AY output and ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • Loading programs directly via SoundblasterLet's just hope this does not sound too silly (I'm a newcomer)... Is is possible to connect a real Spectrum's MIC port to the audio out port of a Sou…

    ... is the audio in port, and EAR is the audio out ... your tape recorder to the EAR socket on the spectrum, ...

    The ROM reads bit 6 of port #FE when loading ... to find wired to the EAR port. All documentation I ... black to load from (in the EAR port) and got a ...
    Dunny Dunny October 2003 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…

    ... not do this only if bit 0 is 0?
    ... treating all port reads with bit 0 as zero as ... 7FFE
    IN A,(+FE) i.e. BREAK and EAR

    EAR as well as the Break.

    So result bit 6 ... is set/reset based on EAR everytime there is an IN ...
    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…

    ... result bit 6 is set/reset based on EAR everytime there is an IN ... /> [/quote]

    No bits in the high byte of the ... for all port reads with bit 0 of the low byte ... that should be copied to bit 6 of all ULA port reads ...
    Woody Woody March 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 ... Issue 3 - due to different bit 6. Programmers should just perform something ...
    piters piters November 2005 Hardware
  • 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…

    ... . Everyone knows the importance of 'EAR' hardware and the bear it ... of ZX81 and ZX82's bit 6 to each sound card input ... /> 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 ... you do an IN on port 254, bit 6 is the EAR input and ...
    gasman gasman April 2007 Hardware
  • Help: OUT (port), A[deleted]

    ... /> LD B, 255 ; 6,255 ; Prepare to loop 255 ... Send 0 to speaker port in bit 4
    DJNZ, out1 ...
    LD B, 255 ; 6,255 ; Prepare to loop 255 ... Send 16 to speaker port in bit 4
    DJNZ, out2 ... the border/speaker/ear control. IN xxFE uses the ...
    Jonathan Harston Jonathan Harston December 2008 Development
  • Help to run Abu Simbel in a +2A SpectrumI bought this game some weeks ago, but the version is the old one. When I loaded it in the emulator, I had to switch the keyboard issue to 48Kissue.…

    ... /> ; for each matching set, swap in a call to our replacement ... of operand
    res 6,(hl) ; clear bit 6 (EAR) of this operand to ... #26, #00

    keyscan_code in a,(c)
    and 31 ...
    Bob Stains Bob Stains January 2009 Games
  • Turbo LoadersI absolutely love the different loading schemes that were used on the Spectrum over the years. There are a couple of questions that I have been meani…

    ... had any hacks at all in the magazines, and not sure ... bit 6 of ear socket then decodes afterwards - never saw anything like that in ...
    nuggetreggae nuggetreggae January 2010 Sinclair Miscellaneous
  • Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…

    ... 23
    in a, ($fe) ; 7f62 db fe
    bit 6, a ; 7f64 ... />
    The Ear bit is bit 4 in 0xfe. The mic bit is bit 3. Not ... sure why you're sampling bit 6 in the ...
    Arjun Arjun November 2010 Sinclair Miscellaneous
  • Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…

    ... 492579]The Ear bit is bit 4 in 0xfe. The mic bit is bit 3. ... Not sure why you're sampling bit 6 in ... port FE; bit 6 of IN-port FE is the EAR input bit, as ... /> L_7F5E: IN A, ($FE) ; 7F5E DB FE
    BIT 6, A ; ...
    Battle Bunny Battle Bunny November 2010 Sinclair Miscellaneous
  • Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…

    ... -port FE; bit 6 of IN-port FE is the EAR input bit, as I ...
    Arjun Arjun November 2010 Sinclair Miscellaneous
  • Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …

    ... br />
    [QUOTE=Arjun;613826]In particular:
    "If output is ... ...
    [CODE]Bit 6 of IN-Port 0xfe is the EAR input bit. The value ... , [COLOR="Red"]and have no EAR input[/COLOR].

    ... tape player, change bit 6 of port #FE in this case, not OUT ...
    Z80user Z80user March 2012 Emulators
  • pc keyboard for speccyis it possible to use a ps/2 keyboard for a speccy. I have a +2A, spectrum+ and toastrack, which all have broken keys. So an external keyboard woul…

    ... '.[/QUOTE]

    But the EAR port is also read at ... , you will have to implement bit 6 in the GAL too, or you ...
    mcleod_ideafix mcleod_ideafix April 2012 Hardware
  • pc keyboard for speccyis it possible to use a ps/2 keyboard for a speccy. I have a +2A, spectrum+ and toastrack, which all have broken keys. So an external keyboard woul…

    [QUOTE=mcleod_ideafix;615949]But the EAR port is also read at ... , you will have to implement bit 6 in the GAL too, or you ...
    bverstee bverstee April 2012 Hardware
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... above:
    It turns out IN F,(C) doesn't do ... follows:

    S flag - bit 7 of port - checked by ... Z / NZ
    5 flag - bit 5 of port - can not ... be checked
    3 flag - bit 3 of port - can not ... /> So the loader relies on bit 6 being EAR, and bits 0-5 ...
    GoingDigital GoingDigital August 2013 Development
<1234567…34>

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