... mean that DIVMMC memory paging may be synchronised with CPU clock. If ... yes, then CPLD read unstable clock.

... a wrong clock signal you can always see the divmmc boot screen ...

... some problems though:
- The clock boost circuit is not perfect ... that - I can get the DivMMC working on a 48K and ... [/QUOTE]
I tested original DivMMC by Mario Prato on my ...

... did some research on the clock signal difference and posted this ... add a 74HC04 to the DivMMC (read the topic for more ...

... DivMMC EnJOY! interface: it has some problems with the ZX Spectrum clock ... a softcore to regenerate the clock signal from the original because ... the CPU clock, but I don't get why a DivMMC / joystick ... interface would need a clock to be ...

... hardware spi port of divmmc (and zxmmc of course) ... the sd card clock follow the cpu clock, so everything ... softcore to regenerate the clock signal from the original ... CPU clock, but I don't get why a DivMMC / ... joystick interface would need a clock to ...

... the hardware spi port of divmmc (and zxmmc of course) ... the sd card clock follow the cpu clock, so everything is ... when synchronising to the Z80 clock, you avoid missing bits ... as pullup from the ZX clock to 5V.
... already pulls up the clock signal from the ULA ...

... the hardware spi port of divmmc (and zxmmc of course) is ... /send a byte every 16 clock cycles so you can obtain ... , gives us 0.25us for clock period, or 4MHz.

So, a free running 4MHz clock should work for your SPI ...

... ]So, a free running 4MHz clock should work for your SPI ... same phase as cpu clock. I built DivMMC with by pass 74lvc14 ... ZX Harelequin Rev D which clock at edge connector is the ... same phase as cpu clock. When I try it with ...

... derive the new, faster CPU clock still taking into consideration memory ... screen modes (and beyond...) ZXMMC/DIVMMC, Multiface... PS/2 keyboard...

... again to make sure the DivMMC works stable on +2A and ... alone doesn't solve the clock problems[/U][/B]
I ... to the 74LVC1G14.
The DivMMC then failed on a toastrack ... /> But when that succeeds, the DivMMC with 1K5 fix does it ...

Tested the DivMMC EnJOY! with 1K5 clock pullup succesfully on three +3' ...

... fix needed to enhance the clock signal on the toastrack, causes ... fix that will enable the DivMMC EnJOY! to work on all ... now:
1. Enhance the clock circuit once again - this will ...

... fix needed to enhance the clock signal on the toastrack, causes ... fix that will enable the DivMMC EnJOY! to work on all ... now:
1. Enhance the clock circuit once again - this will ...

... with parallel communication.
The DivMMC works quite differently.

Mario Prato (designer of the DivMMC) once said:
[quote ... send a byte every 16 clock cycles so you can ... : the sd card clock follow the cpu clock, so everything is ...

... us :lol:, because Ben's DivMMC EnJOY! is not working (yet ... to the very-very weak clock signal (1.46V)
[IMG ...

... I'm waiting for my DivMMC to arrive....


I checked the clock chain (IC 14,15,16 ...

... pull-up resistor on the clock signal, needed for most toastracks ... Imre Jakli from Hungary about clock signals on 48K models: he ... measured the clock signals with different ULA's ... into new designs of the DivMMC EnJOY!.


Switch ...

... pull-up on the clock to have the DivMMC EnJOY! work properly ... : I should really get a clock-buffer circuit ready to solve ...

... [/IMG]
That makes the DivMMC EnJOY! crazy.

... offset was significantly lower and DivMMC EnJOY! started to work ... make nicer screenshots of the clock signal, so I share ... had problems with DivMMC EnJOY! and we suspected the clock signal problem ...

... =107[/URL]
SPECTRA and DivMMC EnJOY! worked together. Two of ... other two failed has bad clock signal with significant DC offset ... -800mV) or the clock signal was too weak and DivMMC EnJOY! didn ... would like to use SPECTRA+DivMMC EnJOY! together?

... to make an acceptable clock signal for the DivMMC EnJOY! and the ... made me possible to use DivMMC EnJOY! and Spectranet connected through ... at all if I connected DivMMC EnJOY! through the SPECTRA ... ISSUE2 and an ISSUE4B Spectrum (DivMMC EnJOY! + SPECTRA) and it ...

... the "low" part of the clock signal.

As ... experimented a little with a clock signal amplifier circuit. These tests ... on something I connected the DivMMC EnJOY! to the Spectrum+ ... the repair/replacement of the DivMMC EnJOY! to continue testing. ...

... was posting questions about my DIVMMC enjoy not working on one ... want to use which the divmmc works with is a 48 ... , or the quality of the clock signal :D

[QUOTE=schombi;801775]Aah, now that?s interesting. Is this something that can be fixed? I?m just surprised not to see this problem with a DivIDE.[/QUOTE]

DivIDE doesn't use CLOCK signal.

search Ben's DivMMC about how to fix it.

...
The fact that the clock signal available on the edge ... Poppi needed to add a clock amplifier to his original ... noticing ( surprise.. surprise..) that the DIVMMC didn?t work with certain ... purpose but the enlightenment of DIVMMC users regarding a possible ...

... Spectrum and the divmmc board to buffer the clock signal, but that ... with v 0.8.5 DivMMC, then:

Detecting Devices ...

... divMMC / divIDE / BetaDisk-Interface etc.
-If possible add an RealTime-Clock ...

... />
Upper trace is the clock from Spectrum. Not exactly an ... resistor to buffer input (the CLOCK signal), and it sure made ... what a surprise! The Zaxon Divmmc board now works just fine ... /> Many Spectrums probably have better clock signal and not need the ...

... interoperability with other interfaces like DivMMC ENJOY! It's quite large ... with weak or DC offseted clock signal. This error occurred only ...