... =5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE ...

... reshaping the ugly shaped clock signal available from the rear ... could give me a ininterrupted clock signal, filling the gaps where ... />
From this restored clock signal, it's easier to syntesize ... a master clock of 28MHz and the clock signal from the rear ...

... R45 that goes between the clock signal of cpu and gate array ... removed from this revision.. the clock also goes to the 74HCU04 ... but no sign of the clock . could this chip be killing ... the clock or is that pesky gate ...

... only the 3.5MHz clock signal at the edge connector. ... periods of contention, the clock signal we have at the edge ... nicely regenerate the Spectrum's clock signal despite contention. However, if ... the next Spectrum clock cycle, the regenerated signal is already ...

... ZX Spectrum clock signal.
With the original design the clock signal is inverted ... which processes the clock signal, very likely to improve that clock signal.
But ... />
This gives a perfect clock signal by default:

[IMG ...

... 3B.
When i check signal with oscilloscope on X1 or ... be the cause of no clock signal?

regards
Maciek

... ) i seem to have no clock,no display,no sound at ... to the cpu pin 6 (clock) and that pin 13 of ...

... chip (power, data I/O, clock signal, etc...)

Please, send ...

Does anybody know the running clock frequency of a Z80A in a ZX81?

I've measured the clock signal on pin 6 and got 6.47MHz, and I'm sure it's not just a harmonic. Now that's just silly - isn't it?

... the scope showing the WAIT signal activity. The Spectrum was running ... />
Meanwhile, the CLK signal shows this (with the same ... br /> A clean and steady clock signal, with no traces of high ... (Z80 capable of 20MHz clock), isolate the CLK signal from the PCB ...

... /> In the analog schematics the clock signal circuit is shown.
I ... TEA2000, but there was no signal (I used the frequencymeter on ...

... in thinking that the CPU clock signal provided by the ULA is ... the 14MHz ULA clock signal divided by four? My logic ... would have expected if the clock is more or less a ...

... although 5V, 12V and the clock signal were present.
So I ...

... )

-Analog Oscilloscope (noise, clock signal checking, glitches, etc)
-Eprom ...

... it and attatching it's clock signal (10MHz) to where the 68000 ...

... of the z80 shows a clock signal. But it's round and ... was expecting. I think the clock is also missing the "contended ...

... a possible absence of a clock signal on the edge connector and ...

... given by a square wave clock signal.

As for outputting ...

... a problem using the 14Mhz clock signal for this and just handle ...

... signals - such as is the clock signal reaching the Z80? (Without a ...

... /> However, there is an 8MHz clock signal to drive the SAA soundchip ... Sam is reset, the 8MHz clock temporarlly stops and this can ...

... that it temporarily suspends the clock signal for Z80? Both approaches look ...

... that.

check the clock signal is making it to the ... Z80 computer, and use the clock signal supplied by the ULA, you ... ULA will stop the CPU clock when contention occurs). That will ...

... />
[QUOTE]
check the clock signal is making it to the ... Z80 computer, and use the clock signal supplied by the ULA, you ... ULA will stop the CPU clock when contention occurs). That will ... video circuitry depends on CPU clock having a constant frequency.

... their heart take a digital signal (the colour depth depending on ... colour) sequentially, along with a clock signal and a couple of sync ... colour output and generates the clock/sync pulses would probably be ...

... ]Does anybody know the running clock frequency of a Z80A in ... />
I've measured the clock signal on pin 6 and got ...

... is dead. That's the signal getting to pin 6, around ... , that's the clock signal pin. No video signal should be there as ... pin the ULA outs the clock signal of 3.25 MHz?

... , that's the clock signal pin. No video signal should be there as ...

... , that's the clock signal pin. No video signal should be there as ... pin the ULA outs the clock signal of 3.25 MHz?[/QUOTE ... used conventionally to indicate a clock).

-- Richard

... means driven by the same clock signal, anything else won't do ...