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<1234567…34>
  • Spectranet questionsI have received the wonderful Spectranet interface from RWAP today. I have started to experiment with it and I have found an interesting thing... So…

    ... + 48K machine with a Zilog Z84C0006PEG NMOS/CMOS Z80 CPU because the desoldered ...
    jimre jimre January 2014 Hardware
  • 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…

    ... any way to distinguish among NMOS and CMOS Z80?[/QUOTE]
    ... Zilog:

    Z0840004PSC = NMOS Z80A
    Z84[B]C[/B]0006PEC = CMOS ... In the case of a Zilog (NMOS) Z80, normal power consumption ... sure in what period NMOS & CMOS products were both in ...
    RetroTechie RetroTechie April 2013 Hardware
  • 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…

    ... then NMOS CPU write value 0 to port BC, but CMOS CPU ... your ZX use NMOS CPU, white border sign CMOS CPU.[/QUOTE]
    NMOS from Zilog) and Z84C00AB6 (CMOS form ST). Things went ...
    TK90XFan TK90XFan April 2013 Hardware
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... the z80 was reimplemented (from NMOS->CMOS, across different sources, z80 ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Emulators
  • What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]

    ... to leave pins floating on NMOS/CMOS because unpredictable things will happen ...
    Winston Winston March 2007 Hardware
  • ZX ULAX emulatorYet another "enhanced" Spectrum emulator for those interested. Some of you might have seen the videos on this channel: https://www.youtube.com/…

    ... of the Raxoft's tests + NMOS/CMOS
    (the previous beta 6 ...
    Lethargeek Lethargeek December 2019 Emulators
  • 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…

    ... between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 would ...
    Zup Zup March 2013 Hardware
  • Clone Project feedbackFinally i now have some time to start again with my clone project. I have decided to drop the 48k project and go directly on a 128k clone. This migh…

    ... Z80C ? CMOS ?
    As far as I know, the NMOS version exists ... only as B version (6MHz), whereas the CMOS version ... kind (it is described in Zilog catalog, but I found it ... where to buy). All these CMOS versions are named Z84C00xx, where ...
    secarica secarica August 2004 Sinclair Miscellaneous
  • Z80 QuestionCan the instruction EX DE,HL be prefixed with DD to give EX DE,IX? Derek

    ...
    They remain undocumented until Zilog documents them. Before then they ... went from NMOS to CMOS in the late '70s. A CMOS design ... have been slightly different from Zilog's when it comes ... acknowledge as being different from Zilog's in the # cycles ...
    Alcoholics Anonymous Alcoholics Anonymous August 2005 Development
  • in quest for a z80 :DI am trying to find a Z80A in some retail shops here in Greece. I have only located the following CPUs branded as either Z80 without anything else o…

    ... on ebay. I bought three NMOS Mostek Z80s recently (probably quite ... . I also have a true Zilog CMOS Z80.

    All the ...
    Winston Winston December 2006 Hardware
  • Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…

    Yes, I'm certain the Zilog-manufactured modern "classic" 40 pin ... ) and are made using CMOS rather than NMOS (and so will draw ...
    Winston Winston October 2007 Sales
  • Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…

    ... is Z84C0008PEG (Z84C00 means a CMOS Z80 CPU, 08 means ... Semiconductors/Microprocessors+/+Microcontrollers+&+peripherals/ZILOG/Z84C0008PEG/displayProduct.jsp?sku= ... , you often see old NMOS Z80s going for less than ... I have a brand new CMOS one in the ALIAC-2 ...
    Winston Winston October 2007 Sales
  • Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…

    ... 's are still manufactured by Zilog.

    In the UK ... is the code for CMOS Z80 (the old NMOS ones were discontinued ...
    Quazar Quazar February 2008 Hardware
  • Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…

    ... .ebay.co.uk/ZILOG-Z80-PIO-4MHz-Z80A-CMOS-RETRO-COMPUTER-TESTED ... 're CMOS. His description text talks PIO and says they're NMOS ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 Hardware
  • 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…

    ... switch circuit, and for Nmos versions, clock signal can ...
    Not according to Zilog...according to Zilog, all versions of the ... Indeed, I've "hand clocked" NMOS Z80s (clock cycles lasting seconds ... obviously far inferior to the CMOS versions - I had one ...
    Winston Winston February 2009 Hardware
  • 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…

    ... 338102]Not according to Zilog...according to Zilog, all versions of ... Zilog supplied databook that has specs for both Nmos and Cmos ... .

    For Nmos Z80, these are both specified ... Zilog's docs.

    [QUOTE] Indeed, I've "hand clocked" NMOS ...
    RetroTechie RetroTechie February 2009 Hardware
  • 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…

    ... a Zilog supplied databook that has specs for both Nmos and Cmos parts ... did you observe in an NMOS Z80 when it was clocked ...
    Winston Winston February 2009 Hardware
  • Recommended book (in WOS archive) for learning Z80 instructions?I have a very vague knowledge of a few Z80 instructions, but would like a comprehensive reference book. Can anyone recommend a decent book in the WO…

    ... mouth as it were - Zilog publish an excellent reference for ... />
    Get it from the Zilog website here:

    [ ... Zilog.

    * (Although only made in CMOS today, rather than NMOS ... , but this doesn't matter - the CMOS Z80 works ...
    Winston Winston April 2009 Development
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... power.

    [B]Zilog Z0840004PSC. Z80A CPU[/B]. This ... (NMOS I pressume), and the last one is a 20MHz CMOS ... version. Both from Zilog.

    [B]Zilog Z0840008PSC. Z80 ... .

    [B]Zilog Z0840020PEC. CMOS Z80 CPU, 20MHz[/B]
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    It would be best if you can get hold of a Zilog Z80, there are some timing issues with the NEC cpus. Also dont get CMOS cpu as there are some difference in those too, compared to the NMOS ones.
    Johan1973 Johan1973 June 2012 Hardware
  • Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…

    ... new. [I]All[/I] Zilog Z80s that I have used ... read some time that Zilog Z80's have less ... Multiface 1. Chances are NMOS and CMOS Z80's behave different ... since you can still buy Zilog CMOS Z80's brand new, and ... this thread is usually NMOS - Zilog or other brand).
    RetroTechie RetroTechie October 2012 Hardware
  • 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]

    Yes, Zilog Z80 NMOS CPU have often problem with ... . But as I know Zilog Z80 CMOS CPU don't have bad ...
    velesoft velesoft April 2013 Hardware
  • 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?
    TK90XFan TK90XFan April 2013 Hardware
  • 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…

    ... between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 would ... (brand not important, but Zilog CMOS Z80's are still made, ... +, I myself would try a CMOS CPU. If when tested, there ... the /M1 problem. Only some Zilog NMOS CPU's had a problem ...
    1024MAK 1024MAK April 2013 Hardware
  • A FAQ from a Z80 datasheet may reveal some up-to-now unknown behavioursA fellow member of the zonadepruebas.com forum has just mailed this PDF to me. [url]http://www.atc.us.es/~rodriguj/zilog_z80_faq.zip[/url] It's an e…

    ... . It's different for NMOS and CMOS.
    NMOS: No, it violates the ... they were Genuine Zilog or a second source NMOS - I do have ... seem to have differences to Zilog ones - for instance, anything written ... work differently to on the Zilog or NEC NMOS Z80s)
    Winston Winston October 2013 Hardware
  • 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…

    ... check whether it's a CMOS or NMOS Z80, and have suitable ... to pick about the earliest Zilog chip they can get their ... small, even between the NMOS Z80 and CMOS Z80B, but I guess ... layout change between even NMOS and CMOS Z80As, or NMOS Z80 and Z80As?
    zub zub April 2014 Emulators
  • 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…

    ... /> [/quote]

    According to Zilog, 20% of their original Z80s ... you need to go from NMOS to CMOS before there would have ... interview with one of the Zilog designers mentioned how Faggin had ... surprised that Intel never sued Zilog for the z80. Well, ...
    Alcoholics Anonymous Alcoholics Anonymous April 2014 Emulators
  • 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…

    [QUOTE]According to Zilog, 20% of their original Z80s ... the fact that there are NMOS and CMOS Z80As should probably have ... interview with one of the Zilog designers mentioned how Faggin had ... surprised that Intel never sued Zilog for the z80. Well, the ...
    zub zub April 2014 Emulators
  • MISSING M1 LINE ON +48????I was posting questions about my DIVMMC enjoy not working on one of my +48`s and have now got round to testing if its cpu related.Trouble is the one …

    An NMOS Z80A CPU can be swapped ... +3). Further, a brand new CMOS Z80 CPU works in most ... -world.com/CPUs/Z80/MANUF-Zilog.html"]click here[/URL] :p ...
    1024MAK 1024MAK July 2014 Hardware
<1234567…34>

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