... IC5, a register updated by clock signal.

In this picture ... , a register updated by CLK signal generated by pin15 on pal ...

... IC5, a register updated by clock signal.

In this picture ... , a register updated by CLK signal generated by pin15 on pal ...

... –$9FFF or $C000–$DFFF). The signal that feeds the /CE of ... ' is also used as the clock signal for the chip that uses ...

Now the right answer: this mod uses an unused NOT gate in IC15 to buffer CLK before passing it to the Z80. In other words: it stabilizes and square-shapes the clock signal.

... . The problem is that the clock signal on the expansion port is ...

... the scope.

- Check clock signal in ULA and also in ... TR6, TR3.
- Check romcs signal.
- Check address bus and ...

... pass 74LVC14 and connect CLK signal direct to CPLD and it ... on a 48K, but the clock signal quality on a toastrack or ... me he has an improved clock inverter that doesn't need ...

... given the weakness of the clock signal (and also its unusual ... phase with the CPU clock (the clock signal at the edge connector ... thus will need a good clock signal). The Schmitt-trigger buffer ... buffer this signal).

Maybe the best clock buffer would ...

I tested the new clock inverter circuit today, ... might not caused by the clock signal at all.
The ... then (with the new clock inverter, so I must ... the problems with the clock signal can only cause the ... But even with a bad clock signal, I would suspect it ...

... might not caused by the clock signal at all.
The real ...

... the problem is the M1 signal from z80, and as the ... />
anyway with a wrong clock signal you can always see the ...

... did some research on the clock signal difference and posted this in ...

... 128K toastrack: the signal was weaker than the clock signal on the 48K ...

... : the one with the worst clock signal of all of them - it ... edge connector from the ULA clock output, this was fixed with ...

... : the one with the worst clock signal of all of them - it ... edge connector from the ULA clock output, this was fixed with ... +2A or +3 never had clock problems :)

Bye

... what is interesting:
"This clock signal is inverted by a transistor ... switch to provide a clean clock edge for the Z80."
clock edge' was in the eyes ...

... what is interesting:
"This clock signal is inverted by a transistor ... switch to provide a clean clock edge for the Z80."
clock edge' was in the eyes ...

... why I am investigating the clock signal[/U]
I'm ... problems with the ZX Spectrum clock signal.[/QUOTE]
The question is ... do you need the Spectrum clock signal? Wouldn't be a more ... a softcore to regenerate the clock signal from the original because he ...

... contention, the sd card clock follow the cpu clock, so everything is ... do you need the Spectrum clock signal? Wouldn't be a more ... Besides, the Spectrum 48K/128K clock is not periodic: it has ... a softcore to regenerate the clock signal from the original because he ...

... contention, the sd card clock follow the cpu clock, so everything is ... that already pulls up the clock signal from the ULA.
So ... too high currents on the clock signal from the ULA.
With ... is pulled tops from the clock signal from the ULA.
With ...

... your hardware generates a clean clock signal. Ben is having a though ... wants to use the CPU clock signal and we all are learning ... here that this signal is a very ugly shaped ... , the mod to restore the clock signal is very easy to do ...

... so a free running clock will probably not work ... be synced to the Z80 clock
- it probably ... halted when the Z80 clock is halted, to avoid ... pullup on the ZX clock signal higher with only a ... decent inverted clock signal out of any ULA clock signal, but only ...

... too high currents on the clock signal from the ULA.
With ... is pulled tops from the clock signal from the ULA.
With ... , this shows that the CPU clock output driver is just a ...

... 't need any resistor, their clock signal is the cleanest of all ... on the clock with the toastrack to create a better signal that ...

... 't need any resistor, their clock signal is the cleanest of all ...

... to do anything to the clock signal.

In any case ... be created to 'fix' the clock signal on any ZX Spectrum externally ...

... fix needed to enhance the clock signal on the toastrack, causes problems ... now:
1. Enhance the clock circuit once again - this will ...

... fix needed to enhance the clock signal on the toastrack, causes problems ... now:
1. Enhance the clock circuit once again - this will ...

... [/URL], with respect to the clock signal phase on the edge connector ...

... [/URL], with respect to the clock signal phase on the edge connector ... because it doesn't need clock signal from ZX spectrum.
See ...