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Overclock the Z80 cpu to smooth out gameplay?Was thinking today of a Genesis/Megadrive mod I did a while back. It involved lifting the CLK leg on the motorola 68000 cpu (which in the MD, if I r…
No, for the spectrum this is not possible. CPU clock and video timing ... the CPU with a different clock source than that of the ... of using a different CPU clock would be unpredictable. The RAM ... -
using the raspberry pi for the zx spectrumI just saw where they are now using a Pi to emulate a floppy disk drive for the Amiga. So it got me wondering if this could be done for the ZX Spectr…
[QUOTE=guesser;737483]No, the two have to communicate ... /> I suspect the answer is no: any communications on the edge ... happen at the Spectrum's clock speed. To take a simple ... -
Things not to do in a powercutplay hide and seek
[QUOTE=guesser;743908]No you misunderstood. Turning the power ... act strangely (and my radio clock was working OK). I shut ... -
Cats or dogs?Let's settle this once and for all... what's best, cats or dogs? Vote now!
no category for gold / tropical fish ... me up at stupid o'clock... owned by idiot neighbours, who ... agreement they signed (i.e. no pets) -
128k+ CompositeAm I to understand this correctly but all thats needed for composite video on this model is to run a wire from pin 1 of the RGB port to the phono out…
... ]
Anything that needs a clock will fail. I don't ... instead of pin 3
No vertical sync pin
No guarantees, just what the schematic ... the Spectrum is totally different; no menu is displayed and it ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... Zilog Z80A processor I had no problems. With the Z80 CMOS ... tried to look at the clock signal. (I don't have ... show any difference in the clock signal at the CLK pin ... the different CPU types. The clock signal at the ULA was ... -
Need Help Finding a BookPerhaps a slim chance, but im wondering if anyone else remembers a particular book. This book i think was in hardback. I borrowed it from my local li…
... site if he didn't clock them already.[/QUOTE]
no-one seems to have responsibility ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... by reflections (the 48K's clock signal is a sawtooth, and ... Z80 to falsely see another clock transition). The 47pF capacitor is ... />
The Spectranet itself makes no use of the CLK signal ... Spectranet is getting a bad clock signal, you will at least ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... Mr Slater's Parrot?[/QUOTE]No, but second cousin to [URL ... candlestick (from Cluedo), an alarm clock (timepieces were altered in Death ... a book that is.[/QUOTE]No, it's the 1989 debut ... "Poy-rot".
Hercule Poirot: No no no! Poirot. It is pronounced "Pwa ... -
Which Windows Emulator will support SPECTRA?I want to start crossdeveloping games for SPECTRA, but it is a pain in the ass to save the TAP on USB Stick or SD Card and test them on my eMac SP Em…
... bytes are read on different clock cycles but from a software ... precise emulation down to the clock level I have created a ... /> [QUOTE=fms;749311]I have no problem adding SPECTRA emulation to ... -
New Game:Killer BeesI have ported one of my favourite games for the Phillips G7000 to the ZX Spectrum. Killer Bees, I spent hours playing this as a kid. The original g…
... trick on the intro screen (no idea if the emulated version ... is that the processor clock and the pixel clock did not have ... plus or minus (because the clock ratio was some odd multiple ... -
Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... from these codes, but the clock is ticking and Jan Bobrowski ... Rak;758004]Indeed, there is no floating bus behavior in the ... slightly different, with different behaviours (no-one really knew at the ... -
Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... from these codes, but the clock is ticking and Jan Bobrowski ... :)[/QUOTE]
I by no means meant to show disrespect ... slightly different, with different behaviours (no-one really knew at the ... -
The Retro CavernFurther to [url="http://www.worldofspectrum.org/forums/showpost.php?p=732788&postcount=9"]Grimmsqueaker's post in the "Buyers beware" thread[/url], I…
... , can't turn back the clock! :)
You're right ... , but also sold now), but no TIB :( - I had both an ... -
Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... for RZX replay. It's no problem for PC emulators, but ... , they didn't bother to clock the INT duration properly, like ... and then charge it again... No surprise it can be imprecise ... -
Tinkering with Nemesis?I thought Nemesis (Gradius) was a poor conversion especially when put next to R-Type. One main problem was the small area and the large size of the s…
... slightly quicker clock speed and hardware sprites there is no reason why ... -
Well, that's me thenJust when everything seemed to be picking up I've been knocked back down to a worse place than I was before :(
... quicker than the realisation that no matter how bad things are ... him to find his alarm clock and wake up! -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... 115.200 bauds requires almost no wait states - perhaps two nop ... instructions per bit. So no processor time is thrown away ... to running at a lower clock speed on modern CPUs. You ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... to operate as normal with no contention.
The tricky bit ... ULA normally supply the CPU clock, and so can pause the ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
Basher - I've no idea about that, but as ... that the ULA supplied the clock and paused it that way ... -
C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…
... only changes CPU and memory clock:
[CODE]BYTEmark* Native ... OC and 20 fps from no OC).
(BTW, I ... -
What's everyone drinking?Since it's the weekend, i assume a lot of Wossers will be enjoying a drink or two. I'm enjoying a nice bottle of Miller. What's everyone drinking t…
Water...
Beer later on no doubt, it's not too far from beer o' clock now :D -
+2 Grey Composite question.Hello all, Long time reader first time poster and all that...... Probably a daft question which has been asked hundreds of times, even though I ca…
Almost no 8 bit or ... for PAL but causes no problems at all on ... PAL but again causes no problems on old televisions.< ... Spectrum derives the colour clock from the same crystal ... source as the dot clock, the number of colour ... all then I see no reason why it would ... -
RS232 on Spectrum 128KDoes anyone actually use the RS232 port on the Spectrum 128K? Is there anything useful that can be done with it? I know about the keypad with the Sp…
There is no RS232 on 128k, there are ... [b]output[/b]. There is no MIDI input (unless you do ... sure that RS232 tolerates some clock drifting, but higher speeds means ... -
ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... circuits on the toastrack's clock signal, with an LM358.
No usable signal at the output ... -
Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…
... bottom and top border where no display is generated), whether the ... of memory for every eight clock cycles, containing two bytes of ... another subject, and there's no need for multiplexing decisions made ... been reached, but there's no 'ADD H, 2' instruction, and ... -
Cheetah SWEET TALKERJust got a bundle of hardware including one of these. I gather its a speech synthesizer in the mould of the currah microspeech. How do i test if it…
... available software. If there is no HALT/WAIT then the software ... tone by fiddling with the clock line):
2K ROM (0x0000 ... the allophone finishes, there is no other way of reading any ... -
Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... came up with a practical clock recovery circuit a while back ... hardware still usable when TVs no longer have any analogue inputs ... -
Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... hardware still usable when TVs no longer have any analogue inputs ... /> I tried to copy your clock regeneration approach for the clashbasher ...
it uses the inverted clock from the edge connector so ... to get 14MHZ back to clock the Parallax propeller which ... -
Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... it turned out to be no more expensive than using ... for your application anyway - my clock regeneration was basically something to ... external components or the FPGA clock management blocks (why? the ... multiple-of-3.5MHz reference clock from whatever crystal is ...
