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<1234567…17>
  • 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…

    ... machine with a Zilog Z84C0006PEG NMOS/CMOS Z80 CPU because the desoldered ...
    jimre jimre January 2014 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
  • 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]
    It ... /> Z0840004PSC = NMOS Z80A
    Z84[B]C[/B]0006PEC = CMOS Z80B
    NMOS parts feel warm, CMOS parts feel cool (as ... not sure in what period NMOS & CMOS products were both in ...
    RetroTechie RetroTechie April 2013 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 direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... has an NMOS CPU (my ALIAC-2 board uses CMOS which has ...
    Winston Winston November 2007 Hardware
  • Dell CMOS batteryHi folks Quick question for the techie types on here. My mum and dad have a Dell Dimension C521 and it needs a new CMOS battery by the looks of thi…

    ... and it needs a new CMOS battery by the looks of ...
    Maroc's Astral Projection Maroc's Astral Projection July 2011 Chit chat
  • 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…

    ... (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 would you ...
    Zup Zup March 2013 Hardware
  • Project #1 : Speccy 128k+2 with diVide inside...Hi guys, I just have finished my Super Spectrum #1 The idea (I was thinking of that since 2007) was to fit an english grey +2 motherboard in a +2A…

    ... had a cmos Z80 in the +2A and a nmos in the ... removed the capacitor on the nmos, and it worked (don' ... another +2a, they all have cmos z80. All my Spectrum in ... working order (4) have now cmos z80, and
    my ... dead) will maybe have the nmos, when I'll repair it ...
    bugpat bugpat April 2013 Hardware
  • A few questions on the Z80A cpuI know this has been discussed before and I read (a while back) the post which goes over the different Z80A CPUs ...(CMOS, NMOS? can't recall exactl…

    ... over the different Z80A CPUs ...(CMOS, NMOS? can't recall exactly).
    thomas3120 thomas3120 May 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…

    ... on a NMOS o CMOS chip?
    - Does the Z80 CMOS suffers from ... ?)
    - What happens if a NMOS Z80 suffers a negative spike ...
    mcleod_ideafix mcleod_ideafix October 2013 Hardware
  • Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …

    ... replaced it with a new CMOS Z80 and confirmed its /M1 ... the CPU for an old NMOS one, but one with a ... cases other than when a CMOS Z80 is fitted.

    Zorn Zorn February 2016 Hardware
  • bizarre error on a grey ZX Spectrum+2 - the long search for a small problemHi, I got a ZX Spectrum+2 that worked a bit but crashed while loading or running 128k games. I installed a 128k-test-ROM that told me about RAM fa…

    ... the CPU with different types (CMOS and NMOS) -> no effect
    ingo ingo November 2016 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 ... 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

    ... went from NMOS to CMOS in the late '70s. A CMOS design requires ... just translated the logic to CMOS, thus keeping all the quirks ...
    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 ... also have a true Zilog CMOS Z80.

    All the ...
    Winston Winston December 2006 Hardware
  • Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…

    On the Z80, someone (perhaps here?) pointed me to a Farnell page - you can still buy brand new bog standard 40 pin DIP packaged Z80s (albeit the CMOS rather than NMOS version). It's even ROHS compliant.
    Winston Winston January 2007 Hardware
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... /> Z80 - use a new CMOS version (same package, same pinout ... switch out the NMOS and TTL chips for CMOS)

    CMOS Flash device, and replace ... RAM with a single CMOS static RAM.

    CMOS parts, doesn't even ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... , everything is NMOS or TTL. My board is all CMOS which uses ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    ... overpowering 1s since in an NMOS Z80, logic 1 is provided ... swapping the CPU with a CMOS version, since the 'on' resistance ...
    Winston Winston June 2007 Hardware
  • Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…

    ... low by (in a CMOS chip) having a complimentary ... Z80 in a Spectrum) use NMOS - so they are comprised ... to +5v. Except with NMOS, there is only the N ... much more power than CMOS - whenever an NMOS logic gate is ... up resistor and using power. CMOS on the other hand, ...
    Winston Winston June 2007 Development
  • Interface extension cable ?I'm wondering if I can make an extension cable for the Speccy's expansion port. It's not the part of making it I'm uncertain about, but wether the l…

    ... exclusively CMOS, which has lower output impedances than the old NMOS and ... 0 to 1 since with NMOS this is done with a ... that, I've given an NMOS Z80 plenty of abuse (i ...
    Winston Winston August 2007 Hardware
  • Interface extension cable ?I'm wondering if I can make an extension cable for the Speccy's expansion port. It's not the part of making it I'm uncertain about, but wether the l…

    ... exclusively CMOS, which has lower output impedances than the old NMOS and ...
    Alcoholics Anonymous Alcoholics Anonymous August 2007 Hardware
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... too much heat to be CMOS, and I presume the outputs ... -pull output - so not strictly NMOS either, at least not for ...
    Winston Winston September 2007 Emulators
  • I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…

    ... suffer SCR latchup (CMOS and quite probably NMOS chips have a 'parasitic ... be CMOS and will draw considerably less power than the original NMOS ... logic: you can use modern CMOS parts (74HCT), lower power than ... RAM, which use a modern CMOS static RAM (and a little ...
    Winston Winston September 2007 Hardware
  • Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…

    ... a resistor (floating inputs for CMOS or NMOS are bad) unless the ... small value - especially when using CMOS gates (the resistor can be ... megohm, and will use microamps. CMOS inputs generally have enormous input ... as logic 1, but for CMOS, floating is undefined and ...
    Winston Winston October 2007 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…

    ... ) 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 rated ... cheaper, 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
  • Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]

    ... it is all CMOS, rather than a mix of NMOS and TTL ...
    Winston Winston January 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…

    ... is the code for CMOS Z80 (the old NMOS ones were discontinued ...
    Quazar Quazar February 2008 Hardware
<1234567…17>

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