World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.006s
<1234567…34>
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... drive the /RAS for a refresh whenever the ULA was not ... during a border update, so CPU refresh never really occurs. (I'll ...
    csmith csmith December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... the ULA book about the CPU refresh (or otherwise) of the lower ...
    Zorn Zorn December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... during a border update, so CPU refresh never really occurs. (I'll ... />
    Hmmm. So that means CPU refresh would happen sometimes as the ... is being displayed and the CPU is reading the ROM? ... Perhaps a CPU generated /RAS pulse could interfere ...
    Zorn Zorn December 2011 Hardware
  • ZX81 internal RAM board?Just a quick question to Zorn (amongst others). What would the issues be with fitting one of Zorn's RAM boards into an unexpanded ZX81? Seems to me…

    ... both CPU writes/reads and to output data during the Z80 refresh ... signal. That is during either a CPU read (/RD ... low) or a CPU refresh (/RFSH low ...
    1024MAK 1024MAK October 2014 Hardware
  • Spectrum Use for ZX81 Pseudo Hi-ResHi Folks, I've been looking around at some of the "Hi-Res" stuff which was achieved on the ZX81 and I came across the faq https://www.landley.net/…

    ... . As far as the CPU is concerned, it executes ... NOP code to the CPU overriding the data from ... CPUs help, using the Z80 CPU refresh cycle)).

    ... data during the Z80 refresh cycle (actually designed to ... arrange for the Z80 refresh address to grab the ...
    1024MAK 1024MAK April 2017 Assembler
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... does not stop the CPU clock during the CPU refresh cycle (see note ... every instruction, the CPU does a memory refresh cycle. The contents ... 7 bit / 128 cycle refresh requirement refresh one row of DRAM cells ... same time. So the refresh address is actually IR.
    1024MAK 1024MAK February 2018 Development
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... doing then.

    Refresh...
    A refresh is each cycle when ... refresh a row but also a read cycles are.
    Normally CPU ... is not random!!!
    The refresh period is: [B]64us * (8 ... 2ms which is a maximal refresh period value.
    So that ...
    brian-82 brian-82 November 2007 Development
  • refresh rate 60hz ??X128 is the best ZXSpectrum simulator of all... ...but have a problem: refresh rate is poor = 60hz... I have a Samsung 950p & Gforce256DDR and both i…

    ... ...
    ...but have a problem: refresh rate is poor = 60hz...
    Alberto Alberto March 2001 Emulators
  • Can a CPU emite microwaves? And other questionsSome CPU/electrical questions for the more technical amongst us: 1. Some time back a bloke I knew, whose PC I used to repair, said that he'd read in…

    Some CPU/electrical questions for the more ... PC magazine that when a CPU reached a certain speed (I ... , does that mean that the CPU is in effect drawing more ... XBox 360 console has a CPU with three 3.2 thread ... enough to supprt a 9GHz CPU?
    ewgf ewgf January 2006 Chit chat
  • PC CPU heatsink and fans to cool down Speccy!Ah ha! I've just had an idea! taking apart some scrap PCs I decided to take the CPU heatsink and fan units off and see if I can attach them to the …

    ... I decided to take the CPU heatsink and fan units off ...
    Count Count July 2006 Hardware
  • Flippin` ebay banner ad :(Sorry to post a new thread over something so trivial, but is anyone else getting sick or noticing the new ebay ads on websites, the banner sized flas…

    ... to 70-90 odd percent CPU for a flippin` banner add ... nuts :( As soon as I refresh page so different banner ad ...
    CKay CKay November 2006 Chit chat
  • Full throttle CPUHello, I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used? If so, what's t…

    Hello,
    I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used?
    If so, what's the game/application?

    B/R,
    Lovespider
    lovespider lovespider December 2007 Sinclair Miscellaneous
  • CPU question about various emulators for and on various machinesRight, you know how nowadays the latest CPUs seem to be dual (or more) core 2.4GHz (or whatever speed) as opposed to, say, single core 5.8GHz? Now I …

    ... or 10GHz, or 50GHz) CPU is impractical, if not impossible ... thickness limitations of the CPU's signal lines, or ... XBox itself has a 700MHz CPU. Fair enough, DOSBox ... DOSBox needs a decent CPU to emulate desirable games ... a P4-1GHz, a 2GHz CPU etc?

    ...
    ewgf ewgf March 2008 Emulators
  • CPU fanI want to buy a new CPU fan. But not sure what to buy can anyone reconmend a good cheap fan :) My cpu is Pentium 4 3.06ghz HT

    I want to buy a new CPU fan. But not sure what to buy can anyone reconmend a good cheap fan :)

    My cpu is Pentium 4 3.06ghz HT
    Countvarg Countvarg May 2008 Chit chat
  • Issue 2 Board - CPU 'Patch'I've been wondering why my issue 2 board has been kicking out this signal when powered up... [IMG]http://www.drumfu.com/ResizedDuffIssue2.jpg[/IMG] …

    ... this is symptomatic of a CPU fault.
    I've had ... evening and noticed that the 'CPU Patch' that should be present ...
    jp jp September 2008 Hardware
  • In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…

    ... that consume a lot of CPU time?

    What I ...
    Rickard Rickard October 2008 Development
  • 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…

    ... I should substitute a NEC CPU in a grey +2.
    CPU with a Zilog one the ... first try to replace the CPU (I would have to destroy ... the NEC CPU while cutting it out).
    ingo ingo February 2009 Hardware
  • How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…

    ... we'll run out of CPU time, for handling all of ... able to write into the CPU registers AF, BC, DE, IX ...
    wilsonsamm wilsonsamm June 2009 Hardware
  • New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…

    ... /> [COLOR="Red"][B]Actually is refresh work on this project.[/B ... SRAM, 512kB FLASH EPROM, Z80 CPU, battery CR2032. PROFI Interface work ...
    velesoft velesoft December 2009 Hardware
  • My CPU heatsink wasn't clipped on.and my computer has been running something like 24/7 for the past something weeks., from time to time doing heavy stuff like compilation tasks and su…

    and my computer has been running something like 24/7 for the past something weeks., from time to time doing heavy stuff like compilation tasks and such.
    Can some damage have happened to my CPU? It seems to be running fine!
    wilsonsamm wilsonsamm February 2010 Chit chat
  • CPU speed measure possible?Is it possible to measure the CPU speed and shows the result on a LED display? Micky

    Is it possible to measure the CPU speed and shows the result on a LED display?


    Micky
    -Micky -Micky May 2010 Hardware
  • A thousand core CPU?Maybe this is old news to most people on here, but according to: [url]http://www.zdnet.co.uk/news/emerging-tech/2010/12/25/intel-why-a-1000-core-chi…

    ... />
    a 1,000 core CPU is theoretically ([B]theoretically[/B ... having a 1,000 core CPU in your PC. All that ...
    ewgf ewgf February 2011 Chit chat
  • Using a Z80 CPU in a 48K Spectrum?Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff? Thanks for re…

    Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff?

    Thanks for reading - weathereye.
    weathereye weathereye March 2011 Hardware
  • Is it OK for a CPU to idle at around 75??I recently found that the (nearly) fanless build I put together had an idling temperature of about 90?C! I nearly fell off my chair when I investigat…

    ... in the PSU.
    Well, CPU temperature is currently at 76 ... Gentoo Linux earlier (lots of CPU-intensive compilation) and I saw ...
    wilsonsamm wilsonsamm August 2011 Chit chat
  • 4164 refreshHi, I remember pondering the mystery of how 4164's seem to get properly refreshed when used as video memory, and half the answer has just popped up i…

    ... a 128 (7 bit) Cycle refresh and one needing a 256 ... (8 bit) cycle refresh.
    It seems most 4164 ... that would successfully refresh a 4116 would successfully refresh most varieties of ...
    spodula spodula October 2011 Hardware
  • Reported CPU speedThe original 16/48K spectrum is often reported as having a CPU at 3.54MHz. While watching Micro Men this evening (see approx 00:54:50), I wondered wh…

    ... often reported as having a CPU at 3.54MHz. While watching ... slightly miss-quoting the 128K CPU speed, but I'm sure ...
    csmith csmith February 2012 Sinclair Miscellaneous
  • The most powerful 8-bit machine, and CPU?Further to the discussion in: [url]http://www.worldofspectrum.org/forums/newreply.php?do=newreply&p=621787[/url] What actually is the best 8-bit ma…

    ... ] Motorola's 0.9MHz 6809E CPU, more sophisticated than the popular ... is the best 8-bit CPU, just wondering what advantages the ... is the best 8-bit CPU, both in the 80s, and ...
    ewgf ewgf April 2012 Chit chat
  • 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…

    ... too much fuss, replaced the CPU and hey presto... a choice ... case I destroyed the original CPU during the desoldering process, I ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • Oooyaah! This came from nowhere......There's a new console in the works, and it's already massively popular, despite not existing... [url]http://www.kickstarter.com/projects/ouya/ouya-a…

    ... $950,000 on Kickstarter. To refresh your memory, the $99 system ... adopters) packs a Tegra 3 CPU, 8GB of storage, 802.11n ...
    deadpan666 deadpan666 July 2012 Chit chat
  • Games that could be better off with a 7MHz CPUI've just reviewed Kung Fu Master for the Spectrum, as I remember it as a very poor conversion from the arcade. Then it just ocurred to me to raise t…

    ... to me to raise the CPU emulation up to 7MHz in ...
    mcleod_ideafix mcleod_ideafix September 2012 Games
<1234567…34>

Latest Posts

  • I bought an accoustic guitar. How do you play it?
    dm_boozefreek on 7:51PM
  • Goodbye Z80
    zx1 on 7:11PM
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21

HitBox

Word Docs Hits
cpu 6.7K 10K
refresh 1.1K 1.5K

Related Threads

  • Atom CPU's vs Other CPU'sI wonder how the Intel Atom CPUs perform against other cpus.<br /> How would you describe the performance of an Atom compared to a Pentium or AMD clo…
  • Games with demo mode (CPU vs CPU)Hi all<br /> <br /> I'm looking for games that include a "demo mode". Right now I'm recalling these:<br /> <br /> -Barbarian<br /> -Way of Exploding …
  • Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![quote]Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![/quote]<br /> Err, why?<br /> <br /> If you are trying…
  • refresh rate 60hz ??X128 is the best ZXSpectrum simulator of all...<br /> ...but have a problem: refresh rate is poor = 60hz...<br /> I have a Samsung 950p &amp; Gforce2…
  • Can a CPU emite microwaves? And other questionsSome CPU/electrical questions for the more technical amongst us:<br /> <br /> 1. Some time back a bloke I knew, whose PC I used to repair, said that …
  • PC CPU heatsink and fans to cool down Speccy!Ah ha! I've just had an idea!<br /> <br /> taking apart some scrap PCs I decided to take the CPU heatsink and fan units off and see if I can attach …
  • Spectrum clone with 6809 CPU?Aparently there's a new Spectrum clone about from a company in Wales. It uses a 6809 processor and has 32K RAM.<br /> <br /> <br /> [url]http://cgi…
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone.<br /> <br /> I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where …
  • Full throttle CPUHello,<br /> I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used?<br /> If …

Related Searches

  • harlequin cpu clock
  • refresh di
  • refresh wait disable interupts
  • refresh
  • wait for refresh
  • cpu speed tester
  • cpu
  • 7 mhz cpu
  • memory refresh
  • dram refresh
  • z80 cpu
  • dead cpu scope
  • z80 cpu source
  • cpu fault
  • spectrum cpu
  • cpu test
  • cpu interferance
  • cpu interference
  • testing nmos or cmos cpu
  • ram refresh emulation

Copyright © 2024 World of Spectrum