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50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…
... , but still needs a coarse clock for accuracy over long periods ... suppose syncing a computer's clock with an NTP server might ... accuracy of the system time clock got to do with the ... sample rate (so the frame timing [b]may[/b] require dropped ... -
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…
... I added support for Pentagon timing instead, so I can finally ... the floating bus behavior and timing. An explanation how the ULA ... find on the 48K and 128K (but not on the +3 ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... low)
The actual timing of RD shouldn't be ... by the free-running 25MHz clock instead of off the Z80 ... 's clock. For the "problem bytes" (pretty ... /> Using the 25MHz free running clock, it shows this when the ... -
Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…
... , and compare that to a timing diagram of when the Spectrum ... (the falling edge of the clock at T2 to the falling ... edge of the clock at T3 - the full memory ... with the Speccy RAS/CAS timing can confirm or deny this ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... of soldering somewhere on the 128K heatsink.
Breathing a ... . Maybe its some kind of timing problem with the DivIDE+ that ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... to do with timing of the Z80 on the 128K board particularly ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... work without problems with any 128k machine and Divide (since Divide ... work without problems on any 128k machine but don't count ... to them, let alone perform timing exact proceedures with 100% accuracy ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... of incompatibility with this specific 128k board issue that was somehow ... identified with the one Spectrum 128K is basically down to ... Z80 has found the right timing to match the circuit board ... !!
The Spectrum 128K service manual may give some ... -
Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
You mean [b]other[/b] than the memory paging, timing changes and almost everything else that makes the 128K different from the 48K other than the AY chip? -
Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
[QUOTE=Philip Kendall;259811]You mean [b]other[/b] than the memory paging, timing changes and almost everything else that makes the 128K different from the 48K other than the AY chip?[/QUOTE]
LOL!
Chris -
2 Spectrums (synched) playing AY tunes?After listening to a few Turbo Sound FM MP3s, I wondered... For those of us who can't build this card, couldn't we synch 2 128Ks and play these tunes…
... the cause of far more timing upset than the crystal clock. -
Hacks to improve existing gamesDoes everyone remember those hacked versions of Commando and Action Force II that had AY soundtracks hacked into them? How about hacking some other …
... contending with a speeded-up clock.[/QUOTE]
How about ... of the music in the 128k version so it doesn't ... -
ANN: Spectaculator 7Spectaculator 7 is now available! More information is available in the [URL="http://www.spectaculator.com/news?ref=wos"]news section[/URL] on the web…
... redirect serial data from the 128K and later models to the ... the com port and the 128K's serial port, but unfortunately ... still far away because of timing issues, but there shouldn't ... -
Spectrum to Amiga emulationIs there an emulator I can install on my Amiga that will play tzx and tap files from the WOS archive? I cannot find one but wonder if anyone here can…
... a LOAD "" or entering the 128K Tape Loader? It should auto ... .[/quote]
What CPU and clock speed? -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... -looking character square) on a 128k machine by putting a red ... quick go.
My timing is out quite out of ... />
Snapshot runs on a 128K system:-
[url]http://www ... -
myspeccy.org - online gaming which auto-saves scoresIt's a blimmin' miracle - I'm most impressed.
... - "ZZ Spectrum" is needed for 128K/+2/+3 entries and it ... , QAOP is arguably more accurate (timing wise) for some 48K games ... ZZ Spectrum just for the 128K games. -
Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... />
Not from RAM, no. 128k models ran faster than 48k ... , as they need such precise timing and border control, but what ... -
Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... strictly from ULA and CPU clock speed, so no speed variations ... so - copying 48k (or even 128k) of PC RAM into a ... ]
Not from RAM, no. 128k models ran faster than 48k ... -
Your views on Technician TedAnother game the were I first bought for the Spectrum. I liked this game alot. It has very good graphics and sound, much better then JSW. It is a ve…
... you had to have perfect timing in some of the tasks ... />
Have you played the 128K sequel, Technican Ted the Megamix ... -
Design Design / Crystal ComputingNice post on [URL="http://groups.google.com/group/comp.sys.sinclair/browse_thread/thread/56e6ebdedc6930ac#"]comp.sys.sinclair[/URL] about [URL="http:…
... the listing. Considering that the clock cycles for all instructions are ... possible to generate the total clock cycle for the listing as ... listing (timing a function perhaps?). Would save looking up clock cycles in ... -
Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…
... experiments showed me that Enable-timing must be
changed for ... .org[/url]
Regarding 128K compatibility a nice idea is ... -
Dead DivIDE?I just switched on my 48K for the first time in ages (which still works fine thankfully) but when I tried it with my DivIDE+, it repeatedly crashed. …
... wouldn't work on the 128k machine with the divide+) on ... something to do with tiny timing differences between the different brands ... -
Ultimate backlash?Looking at all the polls posted on here recently, it would seem that Ultimate's games are not so fondly thought of as I thought they would be. I jus…
... (or Sweevo's Whirled, the 128K version or follow up, which ... needs practice, skill and expert timing to get through all the ... -
NEC CPU - problem?I wonder if I should substitute a NEC CPU in a grey +2. Does anyone else had problems with NEC CPUs inside ZX Spectrum. Some time ago I had a Spectr…
... that wouldn't let my 128K heatsink spectrum boot, that got ... something to do with tiny timing differences between brands and types ... -
TIMEX Sinclair 2068 => ZX Spectrum/Timex2048?Hello. I have opportunity to buy Timex Sinclair 2068. According to www sites dedicated to Timex machines, TS 2068 can handle only 7% (!) of Spe…
... but you'll still have timing and other hardware issues
128K of RAM in the EX ... -
Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …
... running on both 48K, and 128K / +2 in 48K mode. It ... crashes outright in 128K mode, but I'm not ... , should compensate for the 60hz clock. Not sure how solid the ... -
Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…
... controls all the timing, and ramping up the clock may give you ... -
Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…
... ? (I'm assuming the CPU clock is derived from the crystal ... , ie: 3.52 MHz CPU clock vs 3.50 MHz CPU ... clock)[/quote]
Correct. As ... worth noting here that the 128K/+3 machines run at 3 ... -
Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…
... method only works on a 128K, I presume? I guess I ... 's just a matter of timing your screen writes to not ... -
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... Spectaculator. I have noticed subtle timing differences in two of the ... pauses once activated. However, the timing is off and it's ... to synchronise it with the 128K's screen refresh.
