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The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... and standards of logical levels. CMOS Z80 has a TTL logic levels ... then, I have also used cmos logic gates as replacements for ... -
Which type of Z80 cpu to use with ZX 48?Which type of Z80 cpu can I use with ZX 48? Only the 4 MHz cpu's or some with more MHz? Did not know if a 6 MHz cpu runs in a ZX 48 with 4 MHz. Mic…
... " if you're using a CMOS Z80 - this is basically due to ... the lower impedance of the CMOS Z80 outputs, sometimes you get some ... -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
[QUOTE=velesoft;691696]Yes, Zilog Z80 NMOS CPU have often problem with M1 line. But as I know Zilog Z80 CMOS CPU don't have bad M1[/QUOTE]
Is there any way to distinguish among NMOS and CMOS Z80? -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... to distinguish among NMOS and CMOS Z80?[/QUOTE]
Yes. If ... 0 to port BC, but CMOS CPU send value 255 to ... NMOS CPU, white border sign CMOS CPU. -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... to distinguish among NMOS and CMOS Z80?[/QUOTE]
It's ... number, but whether that means CMOS depends on manufacturer. Datasheets will ... what period NMOS & CMOS products were both in production ... some date, there were no CMOS parts. Beyond another date, ... -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... have heard from Winston, the CMOS variant should be the best ... ". The output impedance of a CMOS Z80 is quite a bit lower ... ULA sees some of the Z80 writes instead of the lower ... -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... ;691573]What's the best Z80 for Spectrums?
I ... , Thomson) and technologies (CMOS, NMOS), so what Z80 would you recommend for ... (brand not important, but Zilog CMOS Z80's are still made, so ... +, I myself would try a CMOS CPU. If when tested, there ... -
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... (brand not important, but Zilog CMOS Z80's are still made, so ... -
Homebrew Microcomputer design...getting ICs and stuffFor anyone interest in homebrew microcomputer design or just making add-ons and electronics gizmo's..this might be of interest. Sourcing affordable …
... and RS. Use the modern CMOS Z80 (stocked by Farnell and RS ... -
Fast Z80Todays Spectrums are fast as hell and few software utilises this. Z80 in ReVerSE runs at 42 MHz, in Speccy2010 at 28 MHz, in Pentagon 2.666 and in N…
... /> Are we talking about overcloked CMOS Z80 chips, faster-than-20MHz versions ... /> Two options:
1. Fast Z80 on the mainboard. Plusses: easy ... option.
2. Fast Z80 in NeoGS card, invisible to ... instructions may be added to Z80 instruction set, 2 MB ... -
Fast Z80Todays Spectrums are fast as hell and few software utilises this. Z80 in ReVerSE runs at 42 MHz, in Speccy2010 at 28 MHz, in Pentagon 2.666 and in N…
... Are we talking about overcloked CMOS Z80 chips, faster-than-20MHz ... versions of Z80 (which I don't ... may allow a 7MHz Z80 cycle bus (not sure ... (there are WAITs for Z80), other setups are using ... . ZX Evo uses real Z80. So, no timing issues ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... it as I had a CMOS Z80 to hand).
Firstly ... , no problem with older NMOS Z80's, and adding a scope ... -
what ifJust wondered If there was a new ZX Spectrum to come out what would you like to see in it and what spec would you want with in reason.
Combine a CMOS Z80, a low power CPLD (to ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... : 48K ZX Spectrum with a CMOS Z80. I cannot detect this case ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... : 48K ZX Spectrum with a CMOS Z80. I cannot detect this case ... ]
I can change the Z80 for a NMOS version, but ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... it is possibly causing the CMOS Z80 to falsely see another clock ... an Issue 4B 48K with CMOS Z80s and these both ... machines in question? The Z80 in my Issue 4B is ... its CPU and put a CMOS one in (for science!) ... me a board (plus the CMOS Z80 in question) that is ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... I was experimenting with the CMOS Z80 and the Spectranet. I could ... "interference" was much higher with CMOS CPU than with the Z80A ... -
PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... =Macc;751251]Tried another Zilog Z80 (the only other one I ... be solved with a modern CMOS Z80 (Z84C0xx family) or NEC D780c ... -
Cooler padI have this cooler pad that prevents an old laptop from getting overheated like hell. It is powered by plugging it to the usb port. I don't have a sp…
... the CPU with a modern CMOS Z80
A standard Spectrum ... -
PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... .
[URL="http://www.z80.info/zip/ZilogProductSpecsDatabook129-143.pdf ... "]http://www.z80.info/zip/ZilogProductSpecsDatabook129-143.pdf ... it could explain why the CMOS z80 works and the NMOS doesn ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... scratchpad.wikia.com/wiki/Z80"]the wiki page[/URL], ... of some sources of Z80 that are temperature dependent, ... anything changed with the CMOS versions of the chip. ... I suspect by the time CMOS variants came out, so ... C),255 when using a CMOS Z80. It's probably worth ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... (C),255 when using a CMOS Z80.[/QUOTE]
Cool, I ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... [I]a[/I] model of Z80 accurately, even if it's ... a lot of users, a CMOS Z80 option would be yet another ... certainly plan to modify the Z80 patches for GDB and ask ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... of users, a CMOS Z80 option would be yet ... difference between NMOS and CMOS Z80s. It concerns ... see [url]http://www.z80.info/zip/ZilogProductSpecsDatabook129-143. ... but it was fixed on CMOS processors.
CMOS Z80 on a 48K spectrum, ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... only way to reliably detect CMOS Z80 on a 48K spectrum, I ... whether the underlying processor is CMOS or not, and if so ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... whether the underlying processor is CMOS or not, and if so ... to know whether the current Z80 is CMOS, because it needs to ... easier to get hold of CMOS Z80 in this day and age ... to see wider use of CMOS Z80s, hence, in my opinion ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... to know whether the current Z80 is CMOS, because it needs to ... easier to get hold of CMOS Z80 in this day and age ... to see wider use of CMOS Z80s, hence, in my ... be cleared, but for CMOS Z80s it will be set ... set for both NMOS and CMOS Z80s.
Lastly, ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... only way to reliably detect CMOS Z80 on a 48K spectrum, I ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
For what it's worth, I've not noticed any issues with my Spectranet and Harlequin with CMOS Z80.
I do have the series resistor fix in place on the Spectranet though.
B
