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  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... :
    [code]
    CPU:
    68000 CPU @ 9Mhz, generic CPU
    Z80 @ 4Mhz ...
    RMartins RMartins June 2016 Development
  • R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…

    ... ) Register.

    The Z80 CPU contains a memory refresh counter ... refresh control signal while the CPU is decoding and executing the ...
    RMartins RMartins June 2016 Emulators
  • SMART card not workingHi all, I've got an issue 3 48k which appears to be working fine apart from with a Retroleum SMART card. The card (which works fine on my other Sp…

    ... from the connector to the CPU so I'm checking them ...
    Jet5y Jet5y July 2016 Hardware
  • Buying a new PCSo, here we go again, me posting for help about buying something. Shame you guys ain't on commission :)) Anyways. I've pretty much chosen everyt…

    ... Freezer 7 Pro Rev 2 CPU Cooler
    2 x 4GB ...
    VincentAC VincentAC August 2016 Chit chat
  • New game: ZoomBloxHi everyone, this is my first post here, so first off I'd like to say hello to the Spectrum development community :) I've been developing on an…

    ... graphics
    - The relatively powerful CPU
    - Its overall look and ... limited, therefore unrespectful of the CPU time instead :) )

    [b ...
    Fabrizio Zavagli Fabrizio Zavagli August 2016 Development
  • Redesigning the ZX Spectrum 128k - A lifelong dreamHello, I am myPinballs (Jim) and i run a small business here in the uk making replacement 8-bit hardware pcbs for arcade pinball games as well as…

    ... my own range of replacement cpu and sound board hardware for ...
    myPinballs myPinballs August 2016 Hardware
  • Mastering flagsI'm little lost when different flags are set/reset after logic operations, and what conditions must be met. For example, [code] ld a, MODE…

    ... play.

    Is "Z80 CPU User’s Manual" must read ...
    Bedazzle Bedazzle September 2016 Development
  • AY Sound Effects from WAVI'm wondering if someone has crossed this bridge already. There are a bunch of sampled sound effects in wav form that need converting to the AY ch…

    ... a lot of memory and cpu time. Ideally what is wanted ...
    Alcoholics Anonymous Alcoholics Anonymous October 2016 Development
  • Retromania: 40 years of the Z80 game coding contestAs usual, Retroacción is holding a coding contest for Retromañía (held in November), with cash prizes! This year we're celebrating the Z80 CPU's 40th…

    ... we're celebrating the Z80 CPU's 40th birthday with a ...
    Winston Winston October 2016 Development
  • Media Players and faking Android processorsDoes anyone know a reliable way of checking what processor is really inside something like an Android media player, short of opening the thing up? …

    ... insisted that I check the CPU via Kodi and it happily ... the box. I then installed CPU-Z to see if it ... being faked. Some reviews for CPU-Z also imply that it ...
    richl richl October 2016 Chit chat
  • 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…

    ... ; obviously ok
    * changing the CPU with different types (CMOS and ...
    ingo ingo November 2016 Hardware
  • A few questions about sound and keys in BASICIf I want sound in my BASIC game I have to use BEEP right ? It seems to lock up the CPU for far too long . On Arjun's page I found how to use CALL 94…

    ... seems to lock up the CPU for far too long . On ...
    ivanb303 ivanb303 December 2016 Sinclair Basic
  • New stable version ZEsarUX-4.2Hi everyone! I have uploaded a new stable version of ZEsarUX emulator, version 4.2. You can download it from: https://sourceforge.net/projec…

    ... continuously: waveform, ay registers, cpu stats, debug cpu, visualmem
    Fixed ZXpand ...
    chernandezba chernandezba December 2016 Emulators
  • New machine added to ZEsarUXHi The following video shows the new machine I added to ZEsarUX and it will be on the next emulator version... I think it's not necessary to say w…

    ... .be/8czvSwHj5es

    Only cpu emulation and display, no keyboard ...
    chernandezba chernandezba December 2016 Emulators
  • My re-creacton of the Z80 8-bit Universal IDEI looked into my draw with various bits & bobs for PC and I found there a CF-IDE adapter, HDD ribbons and two CF cards. So, I was thinking to myself,…

    ... connections and seemed that the CPU was not sitting properly in ...
    Claudius Claudius December 2016 Hardware
  • Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …

    ... />
    Could it be the CPU? It runs through the tests ...
    Jet5y Jet5y January 2017 Hardware
  • Replacing z80Hi all, I've just finished removing my z80 and installing it back in in a socket. Surprisingly I haven't broken anything in the process and the sp…

    ... .

    I socketed the CPU because the speccy doesn't ...
    garethadams garethadams February 2017 Hardware
  • Spectrum 48k Clock SpeedSo I was reading the [url="http://www.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum48K_ServiceManual.pdf"]Spectrum 48k Service Manaul[/u…

    ... single-IC central processing unit (CPU). It is
    clocked at ...
    msansom msansom February 2017 Hardware
  • ZX Spectrum border and sound problemAfter recap stange problem with ZX Spectrum (issue 3b) with sound and border. See video at: [url="https://drive.google.com/file/d/0BwhYHKW6xjI-aVdMcE…

    ... slow. I was replaced ULA, CPU, ROM, RAM, (same thing with ...
    skydiver021 skydiver021 March 2017 Hardware
  • ZX Spectrum border and sound problemAfter recap stange problem with ZX Spectrum (issue 3b) with sound and border. See video at: https://drive.google.com/file/d/0BwhYHKW6xjI-aVdMcEY4ajVk…

    ... slow. I was replaced ULA, CPU, ROM, RAM, (same thing with ...
    skydiver021 skydiver021 March 2017 Hardware
  • The HL Register Pair Naming. An Observation.This isn’t really a question or a tip. Just an observation about the naming convention of the registers in the Z80 CPU. It seems that every register …

    ... the registers in the Z80 CPU. It seems that every register ... is just used by the CPU internally.
    Ast_A_Moore Ast_A_Moore March 2017 Development
  • In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…

    ... care not to hog the CPU and cause the game to ...
    adrian_singh adrian_singh March 2017 Development
  • Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…

    So I have a Z80 CPU and a 32k ram chip. ... into ram or into the CPU directly through the data bus ... I need to use the CPU/ ram.
    Yes. I know ...
    KipperKlank KipperKlank March 2017 Hardware
  • Gunfright for C64 and more!After Knight Lore and Pentagram, Gunfright also arrived for the C64/128, Plus 4 and Atari 8 bit. The stunning speed, especially in the C64 version, …

    ... :
    "Again this is all CPU grunt (the only hardware sprite ...
    Pegaz Pegaz April 2017 Chit chat
  • SpecBAS 0.900 ReleasedAgainst my better judgement, here's 0.900. It's got lots and lots new, but mostly the new shiny is the editor. You can indent your code, you can e…

    ... , reducing the workload on the CPU.


    ... .
    Further CPU reductions.
    Reduced idle CPU usage due to ... string characters
    Reduced CPU usage when idle and during ... , resulting in about 70% CPU saving
    Changing the ...
    Dunny Dunny April 2017 Sinclair Basic
  • New ZEsarUX 5.0Hi! ZEsarUX 5.0 is out! :) You can download it from the URL: https://sourceforge.net/projects/zesarux/ Finally I have succeded emulating Si…

    ... disable beeper
    Improved Debug CPU Window: now you can switch ... views:
    1) 1 opcode, cpu registers, other internal registers
    chernandezba chernandezba April 2017 Emulators
  • SpecBAS 0.914 for Windows/Linux64/OSX Released!And here's another round of bug fixes - mostly for the OSX/Linux builds, but the windows build will also benefit. Windows/Linux: https://drive.go…

    ... in the compiler.
    Fixed CPU usage, but breaks the usefulness ...
    Dunny Dunny May 2017 Sinclair Basic
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... $4000-$7FFF. Hence if the CPU also needs to access an ...
    adrian_singh adrian_singh May 2017 Development
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... /> i know for sure that CPU is damaged (already replace it ...
    xaris_sm xaris_sm June 2017 Hardware
  • Key repeat weirdness with EI & IYI finally (after 35 years!) decided to write something a) for 48k speccy b) in z80 assembler. It's been over 20 years since I've written anything in …

    ... above. I'm checking the cpu usage by having a macro ...
    arttu arttu July 2017 Development
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
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