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<1234567…34>
  • Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…

    ... would nicely regenerate the Spectrum's clock signal despite ... used to produce the regenerated Spectrum clock, a stable and ... edge of the next Spectrum clock cycle, the regenerated ... the simulation - one counting Spectrum clock cycles since contention started ...
    Winston Winston September 2012 Hardware
  • Which computer is most similar to Zx Spectrum?I have wondered recently wihch other 8-bit computer is most of all similar to Zx Spectrum. I mean similar graphics, similar gameplay, similar program…

    ... in common with the ZX81 (CPU, 1K user RAM, monochrome, no ... -res graphics, etc.) and the Spectrum (CPU, keyboard, beeper, etc.) but in ...
    Matt_B Matt_B November 2008 Sinclair Miscellaneous
  • what were the things the Speccy architecture was good for?I don't know a hell of a lot about all the different computers hardware and I wanted to know if the way the Spectrum was built lent itself to certain…

    ... doubling of sprites. Scaling in Spectrum games certainly needs to be ... performance mostly comes down to CPU speed, although it can be ... handled by the CPU, and seeing as the Spectrum CPU is better than ... surely this means that the Spectrum is better for games that ...
    jesus 666 jesus 666 November 2008 Sinclair Miscellaneous
  • Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…

    ... it for comparison

    CPU usage

    On many ... utter piss easy for the Spectrum CPU to handle and is doing ...
    jesus 666 jesus 666 August 2010 Games
  • Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…

    ... utter piss easy for the Spectrum CPU to handle and is doing ...
    AndyC AndyC August 2010 Games
  • 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…

    ... dispute that the 16/48K Spectrum CPU speed is a perfect 3 ...
    csmith csmith February 2012 Sinclair Miscellaneous
  • T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …

    ZX Spectrum CPU speed is 3.5Mhz. This ...
    tstih tstih July 2012 Development
  • T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …

    [QUOTE=tstih;641346]ZX Spectrum CPU speed is 3.5Mhz. This means 3.5 million t-states per second as t-state is measure for one complete clock cycle.[/QUOTE]

    But remember on the 128 it's 3.5469 million t-states/second.
    chev chev July 2012 Development
  • 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…

    ... I have only 2 spectrum 48+ keyboard membranes(brand ... seen before more quality from spectrum :)

    [IMG] ... here not working (normal 48k spectrum cpu is not socketed)
    [ ... here working (normal 48k spectrum with different cpu)
    [IMG]http:// ...
    gorski gorski September 2013 Hardware
  • 1985-2015.A topic where we can review games released on the Speccy 30 years ago, or, anyway, talk about that year.

    ... of what the jolly old Spectrum CPU thinks is going on. Spin ... . The saving grace is the CPU's batsman were as flummoxed ...
    Jumping Stack Jumping Stack January 2015 Games
  • problems with a 48k[url]http://imgur.com/lpGfjik[/url] Hi WOS. Its my first post here. I have know about this site for a quite good time, but didnt had the will to con…

    ... . I knew that the zx spectrum has a built in speaker ... />
    So, its the zx spectrum CPU or motherboard fried? the voltage ... , it looks like sending the spectrum offshore for repairs is far ...
    a_motorized_peach a_motorized_peach January 2015 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…

    ... technologies arriving on the ZX Spectrum, I'm beginning to wonder ... we'll run out of CPU time, for handling all of ... computational power of the ZX Spectrum. Let me detail the interface ... able to write into the CPU registers AF, BC, DE, IX ...
    wilsonsamm wilsonsamm June 2009 Hardware
  • 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
  • NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…

    ...
    _________________________________________________
    Hello Spectrum User!

    I ... sequence"
    behind Spectrum or disconnecting one before ... Z80 CPU - e.g. ZX
    Spectrum, Timex ... Not
    exactly for ZX Spectrum, but...)
    - YAMOD. ...
    Yerz Yerz July 2003 Sinclair Miscellaneous
  • Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…

    ... doesn't use ZX's CPU and RAM at all, but ... into ZX's diskette using Spectrum Navigator and the players recognize ... -interfaces, which use ZX's CPU and its RAM (sadly).
    Yerz Yerz March 2004 Sinclair Miscellaneous
  • Spectrum 128k+ for saleHi, I have an excellent condition Spectrum 128k+ (heatsink type) that has been totally reconditioned. -New capacitors, AY sound chip, Z80 cpu, membra…

    ... /> I have an excellent condition Spectrum 128k+ (heatsink type) that has ... capacitors, AY sound chip, Z80 cpu, membrane, etc...
    works great ...
    thomas3120 thomas3120 May 2004 Sales
  • Why I like Atari 8-Bit and Amiga and respect the SpectrumI mentioned this on my other topic already, but I like these two computers because they were designed by an absolute visionary in the computer field,…

    ... up the load on the CPU, etc. His name was Jay ... those same fans of the Spectrum have been able to make ...
    Foebane72 Foebane72 November 2004 Sinclair Miscellaneous
  • 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 ... reading about the poor old Spectrum Orchestra and how thye keep ...
    Count Count July 2006 Hardware
  • Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …

    ... ROM, perhaps a bad CPU (it gets halfway through ... the pins on the CPU and one of the ... My other dead Spectrum is an Issue 6 Spectrum+.

    Spectrum is quite fine, and ... desoldering ICs off a Spectrum motherboard? Any additional tools ...
    Winston Winston November 2006 Hardware
  • Developing the Spectrum ROMI'm working on some Z80 assembler for a Z80-based single board computer that I'm building. For the things that don't poke my hardware, I'm using a Sp…

    ... hardware, I'm using a Spectrum emulator (Fuse) so I can ... - when the code for the Spectrum ROM was being developed, presumably ... they used to develop the Spectrum? I'd imagine debugging would ... and control lines of the CPU)
    Winston Winston December 2006 Development
  • ZX-Poly platform (a mutiprocessor Spectrum)Hello All May be it would be interestingly for you In the New Year 2007 vacation I wrote the emulator of my platform ZX-Poly (idea since 1994) whic…

    ... since 1994) which represents four-cpu spectrum, so I have written the ...
    Raydac Raydac January 2007 Hardware
  • 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. [url]http://cgi.ebay.com/ws/eBayI…

    Aparently there's a new Spectrum clone about from a company in Wales. It uses a 6809 processor and has 32K RAM.


    [url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220101048417&ssPageName=ADME:B:SS:US:1[/url]
    chaosmongers chaosmongers April 2007 Chit chat
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... the -ve polarity the spectrum heatsink works and the machine ... chipset?

    Unfortunately spectrum 128+ does not have a ... of-ULA-Chip-for-Z80-CPU-ZX-Spectrum_W0QQitemZ120137893224QQihZ002QQcategoryZ4193QQrdZ1QQssPageNameZWD1VQQcmdZViewItem[/url]
    ...
    Msx2 Msx2 July 2007 Hardware
  • Spectrum Diagnosis: Purple is not my colour!Hi, I thought the self-fault-finding amongst you might appreciate my learning experience this afternoon in fixing my home-made speccy 48K. Yesterda…

    ... of the 4 digital boards. CPU/ROM - nothing obvious there. ZX8401 ... fine. At this point the Spectrum is still doing weird stuff ... .

    So, if your spectrum is continually resetting, and going ...
    Phu Phu July 2007 Hardware
  • Multi-tasking OS on the Spectrum?Do you think it is possible to build a multi-tasking operating system on the Spectrum? That is, most important the ability to have several task run…

    ... -tasking operating system on the Spectrum?

    That is, most ... processes choses to leave to CPU to the next task.
    CPU?

    Or would that ...
    Rickard Rickard November 2007 Development
  • sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …

    Hi All,
    Is there someone who may explain what these jumpers can be used for.
    [url]http://forest.no-ip.org/repair/jumpers.gif[/url]
    gorski gorski February 2008 Hardware
  • Flabbergasted with the Atari 800! How did it stack up against the Spectrum?I've been watching a few videos of Atari games, and I must say, that as a Spectrum fan, I feel humbled... [url]http://www.youtube.com/watch?v=OXX_ot…

    ... must say, that as a Spectrum fan, I feel humbled...
    CPU-equipped machine be so absolutely ...
    torstum torstum May 2008 Sinclair Miscellaneous
  • A good site with Z80 ZX Spectrum 48K tunesI found this good site; [url]http://z80.e-demo.pl/[/url] ; I listened to a few tunes yet, and I am [B]AMAZED![/B][B]To me it sounds WAY BETTER THAN A…

    ... on the net that 48K Spectrum has very poor sound while ... 48K without taking the entire CPU time and so enabling good ...
    m1omg m1omg May 2008 Sinclair Miscellaneous
  • Video fault with my spectrum, any ideas?Spectrum not working, CPU still seems to work, as the "BEEP" command still operates if machine is plugged in, however it no longer displays a picture…

    Spectrum not working, CPU still seems to work, as ... the TV cable or the Spectrum itself.

    Anyone have ...
    shomenno shomenno July 2008 Hardware
  • New Spectrum Computer DevelopmentHey does anyone know of any decent new Spectrum clones being developed? I find it amazing how Zilog still produce a Z80 backwards compatible chip (an…

    ... know of any decent new Spectrum clones being developed? I find ... designing a low cost super spectrum. This would be an amazing ... be that complicated. Most active Spectrum software developers know how to ... at up to 50MHz, the CPU's speed is comparable to ...
    retrogod retrogod February 2009 Hardware
<1234567…34>

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