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+2 Grey - low 128k sound volumeI'm trying to revive my old grey +2.... First problem was a faulty RF signal, so I bought a SCART cable from Retro Computer Shack on e-bay (it's the…
... that plugs into the sound output on the +2 to take ... -3-8912 chip is very low when compared with the 48k ... music in Renegade is very low when compared to the punching ... -
Designing a Modern 'Professional' low cost ZX Spectrum ??Hi, I'm looking at designing a low cost hight performance (20MHz) ZX Spectrum... in the mould of the original, but using modern-day components. The…
... 'm looking at designing a low cost hight performance (20MHz) ZX ... is as follows :
Low Cost (less than ?50)
Video Scart output for PAL/NTSC Video & ... -
Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…
... add a simple low pass filter to the output of the amplifier ... />
From looking at the output of the ULA luminance pin ... ? Looking at how dodgy the output of the 14Mhz oscillator is ... -
Writing to MIC portSo I had a new crazy idea: How about a stereo beeper engine? Since we can set bit 3 on port $fe to output to MIC, writing such an engine should be ra…
... 3 on port $fe to output to MIC, writing such an engine ... simply need to connect both MIC and EAR to an amplifier ... -
4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... indexed instructions to create pseudo output ports.
To open ... n the the high and low bytes of the 'address' of ... then be a true input/output instruction swapping the byte in ... the spectrum bus. So the output only and the slow speed ... -
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 …
... /> D4 - Parallel port strobe (active low)
F9 - extended ... />
Ports FA,FB, select low and high memory ports on ... and ear/mic, ear having AY output and stereo, ear/mic being for ... specs I have information on low voltage and small scale chips ... -
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…
... out" port to the Spectrum MIC connector, and it worked.
MIC is the audio in port ... via the MIC port; when you save, the sound is output via ... . So I set it quite low and then built my way ... -
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…
... />
Port #254, used as output (using OUT) can be used ... the beeper (bit 4), the MIC connection (bit 3) and can ... one indicates that the print output is to be send to ... -
Samples on ZXWhat is the easiest way to make a sound sample (e.g. sampled speech)on Spectrum using pc samples? Suppose a have a PC .wav file and I want to transf…
... ? Isn't that a bit low ? I thought that the Spectrum ... 2 bit - the ear and mic bits drive at different voltages ... AY has an exponential curve output for its 16 levels for ... -
Audio input on a +2would it be possible to connect an external tape recorder to the socket at the back,or would something bad happen?
... .
The output of the internal deck SHOLD ... is an OUTPUT and connects to the tape decks' mic socket. ... start off with a low volume and slowly increase it ... a resistor unless the output level of the SAVE ... want, ione of a low value shouldn't upset anything ... -
Audio input on a +2would it be possible to connect an external tape recorder to the socket at the back,or would something bad happen?
... C when making high or low pass filters). Although it may ... a blocking capacitor on the MIC line of a normal ... for the speaker, EAR and MIC ports. There is a ... just the filter - on the MIC port, it lacks the resistor ... to a tape recorder's output, or +6 volts DC ... -
Spectrum modsHi all, Looking at my Spectrum stuff and the mod`s I have done. How many of you out there have done Spectrum modifications? And what are they? 1. …
... is an OUTPUT and connects to the tape decks' mic socket. ... the Spectrum to the MIC socket on the tape ... , start off with a low volume and slowly increase it ... need a resistor unless the output level of the SAVE ... want, one of a low value shouldn't upset anything ... -
Fastest Baud Rate On A Loader ?Following on (sort of!) from the thread about the best loading.... Which game(s) had the fastest (highest baud rate) ? I seem to remember a couple …
... AC couples the EAR and MIC sockets to the ULA.
output signal would be stuck permanently ... reference" level available at the output, any signal swing is [b ... because staying put anywhere requires low frequency or DC information, which ... -
Fastest Baud Rate On A Loader ?Following on (sort of!) from the thread about the best loading.... Which game(s) had the fastest (highest baud rate) ? I seem to remember a couple …
... one pin for ear and mic. There are a different set ... via the Spectrum's EAR/MIC ports instead of the pulse ... whether they are high to low or low to high, just so ... further than experimentally generating some output, so I don't know ... -
How to load tzx files into REAL spectrumI have 2 zx spectrum computers, and have been trying to load tzx files into them. I have used several programs to convert them to wav files and them …
... drop the generated WAV file (output from PlayTZX) in and have ... have the BASS set to low and the TREBLE set relatively ... Audacity). The Spectrum's EAR/MIC lead only tends to pick ... one channel from a Stereo output.
Most standard CD ... -
Loading into the Spectrum's mic socketI was wondering if someone could explain something to me that I've never understood. When loading programs the standard way by connecting a tape play…
... both the EAR and MIC sockets are connected to the ... socket, no load from the MIC socket.
... will be designed to output to some sort of ... So playing signals into the MIC socket will have two effects ... shift between high an low signals which it couldn' ... -
Specdrum SyncroI'm having trouble syncing my (revision 4b)48k specdrum. The sync pulses sent out of the MIC socket are low, barely +50db, and isn't powerful enough…
... program to tape, the output is also low. I am now assuming ... for C35 for the EAR/MIC circuit, my board has a ... -
issue 2 sound /loading problemsHello im a newbie to the forum ..have owned spectrums for years..I have a issue 2 board in a dk tronics keyboard that i purchased off of ebay..works …
... transistor to the speaker output / ear / mic circuit, which issue ... 2 is missing. That could explain the low output ... due to limits in output volume. Sometimes it works ... active speaker with headphone output, and connect ZX Spectrum ... -
Which reset method on ZX 48K?What reset method is correct on issue 3b ZX 48K: One wire to R68 and one to C27 (Manual from ZX Spectrum +) or One wire to Pin 26 from CPU and one …
... , you could buy a small low power amp kit (e.g ... wired in to the EAR output, and you'd need a ... it definitely go to EAR, MIC seems more likely to me ... -
Loading from audio source via laptopI am having trouble loading my Spectrum tapes with my tape player - it is connected to my laptop, and I have tried the microphone and headphone socke…
... line in jack. Because the output of your tape recorder/player ... bit too high for a mic input of a PC. ... 5mm stereo plug for the MIC input on one side ... from tape for the sensitiv mic input of the PC. ... that the microphon has very low level while a tape out ... -
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…
... necessarily zero). The Spectrum mic port cannot represent zero, only ... looking for phase changes (the mic port changing state).
... ] ; Band.
fld dword [low] ; Low.
mov ecx,32767 ... br /> mov [edi+2],ax ; Output
add esi, ... -
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…
... , but keyboard, ear, mic and speaker were not ( ... */
PIN 9 = KB4 ; /* */
/* *************** OUTPUT PINS *********************/
PIN 13 = SPK ... triggered by a WR low to high edge, ... -
Spectrum 48+ sound problemHi all, I gotta problem with my little box of tricks? It's the hard key Speccy 48+ but the sound is really faint, is there any way to fix this?
... sound is present, but very low or distorted then I'd ... />
Is the sound output at the MIC socket OK?
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... the output signal has a frequency of 50000000/65536 = 763Hz . Low enough ... to be clearly heard by the human ear. The output ... is routed through the MIC/TAPE signal.
output generator, with horizontal and ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... or it may damage the output amplifier on the soundcard. Just ... does seem to be fairly low.
A stereo-stereo ... between the line in and Mic to record saving tones from ...Using downloaded WOS filesI am the new owner of a 48K Spectrum, which loads games from tape without any problems. I am not having great success with games downloaded from the…
... not all laptops have a low output, simply most of them.
output of a personal CD player ... - and that works directly from mic out on a 48 to ... and safety regulations demand low levels of audio output - maybe the stuff ...Loading from/saving to Zoom H2NI have recently acquired a Zoom H2N Handy Recorder for various audio-based purposes, and I am interested in loading my Speccy games from the H2N (Wav…
... for 48K and 128K machines (MIC port on Speccy connected to ... . So the MIC port of the Spectrum is its output and the ... and line In to the MIC port of the Spectrum.[/B ... be connected to a low impedance EAR output of a typical tape ...+3 loading problems.I can't load from tape on my plus three. I'm using a stereo to two mono cable, and when I plug the correct cable in to my computer or tape recorder …
... is sound out/tape out (mic on 48k), the other channel ... are feeding the tape recorder output into the +3 sound out ... , OR the volume is too low.
Does the border ...48k noise problem..Hi guys, I need some hardware advice with my old 48k. The machine is VERY noisy - I've fixed the video noise by performing the 'composite' mod, but …
... of the MIC socket on the Spectrum.
The output can ... be at a fairly low level - it was ...1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…
... to beeper sound from the MIC port only, so that' ... to hear it through the MIC on bigger and better ... that's where the filtered output would be most accurate. ... we're sampling with a mic and you have to ... single pole response starting quite low and then a second ...
