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Search Again :: Adv Search 783 results in 0.002s
<1…12131415161718…27>
  • Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…

    ... based on a single supply CMOS rail to rail op-amp ...
    Winston Winston August 2012 Hardware
  • Successfully updated Issue 2 48k to 128k?Thanks to the donation by PMSR and through the very patient teachings of Velesoft, I have updated the Issue 2 to work with 128k. However. I have yet …

    I am using a NEC 70008C (cmos) CPU because it provided better stability with my DivIDE. Can that be a problem?
    Johan1973 Johan1973 August 2012 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... them all go high simultaneously. (CMOS generally is weakest trying to ...
    Winston Winston September 2012 Sinclair Miscellaneous
  • 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…

    ... a college of mine developed CMOS chips in the GDR and ...
    ingo ingo October 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…

    ... 1. Chances are NMOS and CMOS Z80's behave different in ... you can still buy Zilog CMOS Z80's brand new, and ...
    RetroTechie RetroTechie October 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…

    ... better drive, for instance a CMOS Z80 or a different manufacturer ...
    Winston Winston October 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…

    Does anyone have any experance with the Zilog 10MHz or 20MHz CMOS chips?

    Mark
    1024MAK 1024MAK October 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…

    ... the Zilog 10MHz or 20MHz CMOS chips?
    [/QUOTE]

    Spirantho Spirantho October 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…

    The only issue with CMOS Z80s like the one pictured ... slightly higher resistance values. The CMOS Z80's outputs have much ...
    Winston Winston October 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…

    ... />
    I have used Zilog CMOS 10MHz Z80's from ic ... also got a few Zilog CMOS 20MHz Z80's, hence my ...
    1024MAK 1024MAK October 2012 Hardware
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... the bits 5+3 after SCF/CCF rather than copy like ...
    Patrik Rak Patrik Rak October 2012 Emulators
  • 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…

    ... -B, or -H, or any CMOS version).

    Russian or ...
    RetroTechie RetroTechie October 2012 Hardware
  • Edge connector breakout board/level translator boardFor a new project I'm thinking of working on (gah, too many projects...) I'm going to be making a new edge connector breakout board. Basically what …

    ... />
    My first go with CMOS back then was amusing too ...
    Winston Winston October 2012 Hardware
  • Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…

    ... />
    Other Instructions
    ------------------
    SCF CCF NEG CPL RLD RRD ...
    Jonathan Harston Jonathan Harston November 2012 Development
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... the bits 5+3 after SCF/CCF rather than copy like ... +3 flags after POP AF ; SCF and POP AF ; CCF are ... , he is using SCF+CCF and CCF+SCF to make it work ... between POP AF and the SCF/CCF, to see what the ...
    Patrik Rak Patrik Rak November 2012 Emulators
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... putting various instructions between two SCF instructions. Here is what I ... /> In each case the last SCF did OR operation.
    < ... affects the flags, the subsequent SCF or CCF operation performs move ... the flags, the subsequent SCF or CCF operation performs OR ...
    Patrik Rak Patrik Rak November 2012 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…

    ... the outcome of (at least) SCF/CCF. That's quite disheartening ... in case of the the SCF/CCF instructions, which seem to ... to flags 5+3 after SCF/CCF if the previous operation ...
    Patrik Rak Patrik Rak November 2012 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…

    ... ) too. This new discover about SCF/CCF (must read carefully) may ...
    mcleod_ideafix mcleod_ideafix November 2012 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…

    ... if anything changed with the CMOS versions of the chip. The ... (I suspect by the time CMOS variants came out, so many ...
    Winston Winston November 2012 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…

    ... more test vectors, to test SCF and CCF alone as well ... as SCF+CCF and CCF+SCF. I have also ...
    Patrik Rak Patrik Rak November 2012 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…

    ... other instrcution except CCF and SCF. So that's good.
    Patrik Rak Patrik Rak November 2012 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…

    ... other instruction except CCF and SCF is affected by the Q ... the flags, the immediately following SCF/CCF does move of bits ... 't modify the flags, the SCF/CCF does OR of bits ... of the instruction interrupted, the SCF/CCF executed as first instruction ...
    Patrik Rak Patrik Rak December 2012 Emulators
  • New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…

    ... TEST
    FAILS:
    - 001 SCF:
    CRC: 45FC79B5 EXPECTED: D841BD8A ... TEST:
    - FAILS:
    - 001 SCF
    CRC: 958E3E1E EXPECTED: 3EC05634 ...
    zx81 zx81 December 2012 Emulators
  • New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…

    ... F register are set after SCF and CCF instructions. Some ... quite random results after both SCF and CCF instructions on ... and I noticed that the SCF/CCF test failed, as ... to figure out that SCF/CCF doesn't do ... also to specifically test the SCF/CCF behavior. I have ...
    Patrik Rak Patrik Rak December 2012 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…

    ... the flags, the immediately following SCF/CCF does move of bits ... 't modify the flags, the SCF/CCF does OR of bits ... this regard, so the following SCF/CCF does OR.

    Patrik Rak Patrik Rak December 2012 Emulators
  • Sinclair ZX Spectrum FAILS latest radio noise rules SHOCKCan I really be the first to have mention this? Article on El Reg reports: [url]http://www.theregister.co.uk/2012/12/13/sinclair_spectrum_fails_mode…

    ... , with a higher use of CMOS the signal edges are much ...
    Winston Winston December 2012 Chit chat
  • 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…

    ... PCB prototype.[/QUOTE]
    antoniovillena, CMOS logic is not compatible to ...
    Black_Cat Black_Cat December 2012 Hardware
  • 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…

    I use cmos z80 in my zx machines, no problem. Depending on what cmos logic you are using, they are capable of handling the voltage levels, but the switching action of cmos is much faster than TTL logic, and that might be a problem sometimes.
    Johan1973 Johan1973 December 2012 Hardware
  • 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…

    [QUOTE=Johan1973;670454]I use cmos z80 in my zx machines, ... no problem. Depending on what cmos logic you are using, they ... , but the switching action of cmos is much faster than TTL ... and standards of logical levels. CMOS Z80 has a TTL logic ...
    Black_Cat Black_Cat December 2012 Hardware
  • 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 ... then, I have also used cmos logic gates as replacements for ...
    Johan1973 Johan1973 December 2012 Hardware
<1…12131415161718…27>

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