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  • Playing SID music on AY??Hello. Some time ago, with occasion of another thread, I was asking about possibility of making a very certain thing - a SID emulator for Spectrum …

    ... you can't just directly replace AY/YM with YM2203. Yes, TS ... connected to the computer through AY/YM IC socket - they were ...
    Shiru Shiru February 2011 Development
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... more, Its actually pretty simple. (CPU cycles are stretched before /MREQ ... , and A14 is high, the CPU is accessing the memory, otherwise ... cos i'm going to replace the whole lot with static ...
    spodula spodula February 2011 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…

    ... seriously doubt programmable logic will replace the CPU. Computers *may* come with ... 't need a uC or CPU to load the configuration onto ...
    Winston Winston February 2011 Chit chat
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... -build of Spectrum, with real CPU, extension port and maybe some ... standard interfaces like joystick or AY.
    Hope Chris will deliver ...
    kpuchatek kpuchatek February 2011 Hardware
  • Zx Spectrum 48k+ black screenHi A friend of mine gave me his 48k+ and when i tried to turn it on I just get a black screen of the TV. I don't have sound of the console. Where c…

    ... check a CPU (without a logic / oscilator probe) is to replace it ...
    Zetr0 Zetr0 March 2011 Hardware
  • Zx Spectrum 48k+ black screenHi A friend of mine gave me his 48k+ and when i tried to turn it on I just get a black screen of the TV. I don't have sound of the console. Where c…

    ... check a CPU (without a logic / oscilator probe) is to replace it ... /> Where can i buy the CPU and the ULA?

    Trajano Trajano March 2011 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…

    ... doing nothing I plan to replace all the memory chips and ... nice to know if the CPU is O.K before I ... ULA. I have a Z80 CPU from days of long ago ...
    weathereye weathereye March 2011 Hardware
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... />
    (I don't mean AY, as it's still easily ... />
    Externally, yes, Because the CPU and the Video bus are ... original speccy), and only the CPU bus goes to the edge ...
    spodula spodula March 2011 Hardware
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... />
    (I don't mean AY, as it's still easily ... will exist. You can only replace GAL chip for change features ...
    velesoft velesoft March 2011 Hardware
  • Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…

    ... . One for the Z80 and AY emulation, running at high priority ... in the sound when the CPU is overstressed by the graphics ...
    Dunny Dunny April 2011 Emulators
  • Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…

    ... . One for the Z80 and AY emulation, running at high priority ... in the sound when the CPU is overstressed by the graphics ...
    Arjun Arjun April 2011 Emulators
  • likely damage caused to +2 by too highly rated supplyHi. did have a quick search but couldn't see an answer. I've been offered a +2 which the previous owner damaged by connecting too high a power supply…

    ... that you will need to replace the 5 volt regulator. With ... may need to replace a few items... fortunately the CPU, Memory Chips ...
    Zetr0 Zetr0 April 2011 Hardware
  • likely damage caused to +2 by too highly rated supplyHi. did have a quick search but couldn't see an answer. I've been offered a +2 which the previous owner damaged by connecting too high a power supply…

    ... that you will need to replace the 5 volt regulator. With ... may need to replace a few items... fortunately the CPU, Memory Chips ...
    xbomber xbomber April 2011 Hardware
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ... channels are played on the AY and the last channel ... be for a 1.75Mhz AY to be in tune ... of the CPU (providing the AY is half the CPU clock). The ... ]
    Each of the AY channels has a volume setting ... +tC[/b]

    AY Registers will retain their contents ...
    chev chev April 2011 Sinclair Basic
  • Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…

    ... , also a 128K machine) to replace Z80s with bad M1 lines ... rate will not damage the CPU.[/QUOTE]

    Great!!. If ...
    Mobutu Mobutu April 2011 Hardware
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... [/QUOTE]

    As first replace original HAL10H8(or PAL10H8 ) with ... step connect signal RFSH from CPU with pin 11 of GAL16V8 ...
    velesoft velesoft April 2011 Hardware
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... 128K which uses the AY. (Does the AY at least get rid ... by CPU"[/I]

    the difference between if1 and ay seems ...
    tstih tstih April 2011 Development
  • New Game: Cray 5 from Retroworks.It was presented on RetroEncounter meeting last saturday, and now it's released, check it here: [url]http://www.retroworks.es/php/game_en.php?id=9[/…

    ... " for +3 that has different CPU speed form standard Spectrum, and ... , the shadow screen and the AY chip.
    - In some cases ... about the shadow screen, make AY support optional and use multiload ...
    utopian utopian April 2011 Brand new software
  • So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…

    ... , for instance, know that the CPU clock speed was actually quite ... a Melodik if you want AY.

    On the other ...
    chev chev April 2011 Sinclair Miscellaneous
  • Load! Screen$ questionI've got a basic program listing in BASIN which among other things recalls a screen via Load! (I've Save!'ed a screen into memory before hand). How d…

    ... fixed by injecting basin's cpu/ay registers into snapshot file.
    Arda Arda April 2011 Sinclair Basic
  • This might be something new[img]http://www.711chan.org/test/src/130427925559.png[/img] Have a look at this screenshot of my emulator ZX82. Notice the copyright message? That's…

    ... 's because I hope to replace any ROM routines with routines ... stressful task on a modern CPU. Unless you run at the ...
    AndyC AndyC May 2011 Emulators
  • DIVIDE - source code of new FATWARE 0.14[B][U][SIZE="5"]Source code of FATware system is now free.[/SIZE][/U][/B] BAZE (author of FATWARE) release source code of last version FATWARE 0.14 …

    ... in area 8184-8191 (if CPU jump to this memory space ... (227),A ;active mapram mode (replace zx rom with ram3+ram2 ...
    velesoft velesoft May 2011 Hardware
  • World of Spectrum JAM - All Abilities Welcome.Well I since I got my new keyboard the other week I had this brain wave for a World of Spectrum Jam. I aim to have it work like this. First someone …

    ... or 3 128K using the AY chip) and drive it with ... also that there is enough CPU time left over while trying ...
    Winston Winston May 2011 Chit chat
  • World of Spectrum JAM - All Abilities Welcome.Well I since I got my new keyboard the other week I had this brain wave for a World of Spectrum Jam. I aim to have it work like this. First someone …

    ... or 3 128K using the AY chip) and drive it with ... also that there is enough CPU time left over while trying ...
    Scottie_uk Scottie_uk May 2011 Chit chat
  • Japan Tsunami AppealAs some of you will be aware, I've been tinkering with an open source version of SE Basic that could be distributed with hardware without infringing …

    ... behaviour. OpenSE BASIC supports an AY chip on either the Timex ... happens that one of the AY ports on the Timex ... writing to the Timex's AY port. That's why ... the calls to the Timex AY chip, but I wanted ... (ula), a ;[/code]

    replace the out (c), e with ...
    chev chev May 2011 Sinclair Basic
  • Question about DivIDEHi guys, Tell me this... (please) DivIDE features an "auto-mapping feature transparently maps shadow ROM at important entry points". Depending on …

    ... ) memory.

    If CPU read instruction from one of ... betadisc)

    example:
    CPU read first byte if instruction ... byte.
    Example:
    CPU read instruction byte from adress ... 2) true 16kB allram mode (replace ZX rom with external 16kB ...
    velesoft velesoft June 2011 Hardware
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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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    rich_chandler on April 21
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    harriusherbartio on April 21
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    harriusherbartio on April 21
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    mel the bell on April 20

HitBox

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ay 7.7K 12K
replace 5.4K 6.2K
cpu 6.7K 10K

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