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Folks with real speccies - test this!A lad from another forum has written a music demo for the Speccy, but he can only test it on ZXSpin, so needs some helpful chaps to record this to ta…
... be tomorrow ...
Hmmm ... no, probably not tonight. I'm ... the table at 2 o'clock in the morning so that ... ... it's a puzzler and no mistake.
In the ... -
Spectranet updateHi all It's been a busy summer, and in any case I've wanted a little bit of a break from doing Speccy stuff to avoid it getting old (pun intended). …
... in phase with the CPU clock which reaches all the way ... the inverse of the CPU clock (there is a transistor inverter ... because during the prototyping stages, no problems showed up. In hindsight ... -
annoying vibrationsabout a month ago I noticed this weird vibration/very low frequency noise which went on about an hour in my house, couldn't figure out the source but…
... radiators, make sure there is no trapped air.
Then ... specific times, all round the clock. wakes me up sometimes... dunno ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... reason :)
No I can't think of ... /> [EDIT: er, apart from the clock, that's actually a vaguely ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... for some reason :)
No I can't think of ... /> [EDIT: er, apart from the clock, that's actually a vaguely ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... original ROM is paged/enabled, no harm is done.
- If ... memory access to 0000-3FFF no matter if it's a ... colission condition happens for two clock cycles, or 571ns. -
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
[QUOTE=Fraser;683480]No particular frequency will help to ... . The problem of 3.5Mhz clock reference is that is centered ... problem of the 3.5Mhz clock. -
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... problem of the 3.5Mhz clock.[/QUOTE]
This is ... sounds you intend to process. No need to try to get ... -
Spectrum 48k clonesI saw this website today and numerous 48k Spectrum clones. [url]http://zxspectrum48.i-demo.pl/clones.html[/url] A couple of them are really beautifu…
... the OS, a slightly faster clock, no video signal in the edge ... -
Oscilloscope recommendationsOscilloscope, precious, shiny things, me wants it! Me wantsss it! Er, so basically... I want to get a decent enough o'scope which would let me trace…
... ). And also trace things like clock signals (to ram chips and ... ][/QUOTE]
I have no idea where things will lead ... -
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…
... ) and keep it. One clock period (7MHz clock) after the falling edge ... be contended, as there's no separated data bus for VRAM ... />
That's the advantage. No floating wires, except those for ... -
Just a curiosity of mixing synth with samplesThis is really a proof of concept, I made for the idea of playing simultaneously two ZX Spectrum computers, where one is playing chiptune music and t…
... (different models with slightly different clock speeds) wouldn't drift out ... time waiting for the next clock tick, so it would probably ... trackers once and there was no drifting (that's what I ... -
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…
... ]s[/B] it. One clock period (7MHz clock) after the falling edge ... be contended, as there's no separated data bus for VRAM ... display/attribute pair. There is no need for this as the ... or attribute byte as if no contention occured, although the timing ... -
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…
... present in the ULA+, so no problem with A14-15.
clock and fetching video bytes, which ... -
Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... it in and go, and no modifications to the machine are ... regenerate the 3.5MHz clock - so that no one has to solder ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... garden maze thingy against the clock. I [I]only[/I] just ... in order to beat the clock to the end ;-)[/QUOTE]
no problem as long as you ... , they're dead and can no longer take off your arm ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... output is available, there's no way to skew the timing ... , the calculate value of Z80 clock is 3,57541 MHz (nominal ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... finished this properly? I have no idea what I was supposed ... 28 seconds left on the clock?
Tbh the only ... -
Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…
... ' is also used as the clock signal for the chip that ... up with a lot of "No disc in drive !"
Circumspect - A Spectrum Emulator for learningThis is a project that I have been playing around with for a while. It must be said, I tend to have problems getting things finished where hobbies a…
... bytes.
I have no expertise on emulator writing, so ... among them. I suspect that clock frequency are different too, owing ...Circumspect - A Spectrum Emulator for learningThis is a project that I have been playing around with for a while. It must be said, I tend to have problems getting things finished where hobbies a…
... among them. I suspect that clock frequency are different too, owing ... , but if not, I see no reason to care about this ...What do this modification ?Hi All, I get from ebay black 2a, I open to clean case and show ... this [IMG]http://forest.no-ip.org/wos/2a.jpg[/IMG] what do this modification ? …
... Z80 with a 8.8MHz clock, so the computer is running ... to supply its result in no more than 1500 / 8.8 ... and write cycle should last no longer than 169ns and 338ns ...DK Tronics 3 Channel Interface + 128K Spectrum1. Does the DK'tronics 3 Channel AY interface work with the 128k toastrack / +2 grey? 2. As the DK'tronics interface uses a different OUT command/po…
... timing crystals and clock signals - a major hurdle. No doubt one of ...DK Tronics 3 Channel Interface + 128K Spectrum1. Does the DK'tronics 3 Channel AY interface work with the 128k toastrack / +2 grey? 2. As the DK'tronics interface uses a different OUT command/po…
... timing crystals and clock signals - a major hurdle. No doubt one of ... scene.
Somehow there is no 'demand' for it.
Faulty 48K Issue 3 motherboardHi I have a faulty Issue 3 motherboard and would appreciate it if somebody can steer me in the right direction of where to begin with the fault find…
... with switch-on. There are no other lines, etc, just a ... the scope.
- Check clock signal in ULA and also ...First polyphonic beeper tuneWhat was the first game on the 48k Speccy to have a polyphonic tune? By this I mean a proper 2 (or more) channel tune, not the "lots of really fast …
... be the same number of clock ticks no matter what jump instruction ...First polyphonic beeper tuneWhat was the first game on the 48k Speccy to have a polyphonic tune? By this I mean a proper 2 (or more) channel tune, not the "lots of really fast …
... be the same number of clock ticks no matter what jump instruction ...Why no 'Avalon' loading screen?I was always disappointed that 'Avalon' & 'Dragontorc' were missing loading screens. I wonder if Steve Turner, when he sees this, could tell us why? …
... ) He forgot to put the clock forward for BST and missed ... screens? We ain't got no loading screens. We don't ... need no loading screens! I don't ...Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
... .200 baud technology wastes almost no extra processor time (since it ... - remote file system, real time clock, etc. to enable speccy to ...
