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  • 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…

    [QUOTE=Winston;499457]
    The RAM speed thing is why Acorn ... pipelines and pipeline logic. Tying RAM speed to CPU clock is ... hopes that the average memory access time would tend toward the ... /> CISC processors dealt with slow RAM in an additional way: do ...
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Hardware
  • 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…

    [QUOTE=Alcoholics Anonymous;499468]Tying RAM speed to CPU clock is ... in 'page reads' (to avoid RAM wait states, remember the ARM2 ... access data faster than the 150ns speed rating of the 4116 RAM ... write as you access data within a specific RAM page).

    Winston Winston December 2010 Hardware
  • 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…

    ... NeoGS allowed to use memory access in ROM area for the ... Z80 and a lot of RAM).[/QUOTE]

    Exactly. A ...
    Mister Beep Mister Beep December 2010 Hardware
  • 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…

    ... its cycle time tied to RAM speed would be optimal. ... the early '80s that RAM speed was going to be ... they were using page mode access and could make use ... of the page mode access cycle time hints at ... cpu would improve only as RAM speed improved whereas other ...
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Hardware
  • 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…

    ... a Spectrum emulator and WiFi access to the interent to download ... software and with access to a browser for WoS ... a VDP chip with 512K RAM and the original and new ...
    retrogod retrogod December 2010 Hardware
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... shorter push/pop sequences to access them. There are good reasons ... of the new stdio (treat ram as a ramdisk with seek ... up to the top of ram where the lookup table for ...
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Development
  • Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…

    ... /> USR 0 mode allows full access to the 128 paging register ... and full 128K of RAM without 128 BASIC getting involved ... will corrupt one of the RAM pages.
    Jimmy Jimmy December 2010 Games
  • JowspamJust a heads up for those who have had jowspam in the past. Its starting again...

    ... surfing webrowser a decent internet access speed - while not only keeping ... .8ghz processors with 6gb of ram cant handle 100kb download or ...
    Chris Pile Chris Pile January 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…

    [QUOTE=Robin;505412]dmy 5000 PIC (yes im inventing my own series of chips)[/QUOTE]
    does it a use a 4 bit processor... can it access more than 16 bytes of ram this time... :roll:
    guesser guesser January 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…

    ... implementation and tbh 48k ram is very tight for ... a slow means to access a flat memory model.< ... translation table and hooks into RAM (i.e. rewiring IM1 ... this part will be in RAM - but it should be ... simple mounting protocol enabling ZX access to 32 bit virtual ...
    Alcoholics Anonymous Alcoholics Anonymous January 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…

    ... /> [QUOTE=csmith;506356]
    The RAM bank switching is entirely handled ... , then you replace the 16K ram with a 64K memory bank ... is contended), and the 32K RAM with another 64K memory bank ... stick to TTL. (I have access to an Eprom programmer, and ...
    spodula spodula January 2011 Hardware
  • How the spectrum generates the video from ramHi everyon, I know that most people here allready know this but i think i found out how the spectrum acctually dispalys stuff and why the LD x, (HL)…

    The cpu and ula cannot access the display ram at the same time ... display, the z80 can happily access the other 32k without any ... the ula or display device access the ram half the time and ... the z80 access it the other half ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Hardware
  • BASin Problems etc.Hi Folks, Paul has asked me to open this thread to document any outstanding issues that we find within BASin. No guarantees that Paul can/will fix …

    ... the 128K RAM disk
    [*]Repeated access to the 128K RAM causes BASin ...
    Paddy Coleman Paddy Coleman January 2011 Sinclair Basic
  • Was the +3 a missed opportunity?I just wanted to gauge WOS opinion on this. Do people think that the +3 was a bit of disappointment that didn't really advance the hardware as much a…

    ... unreliable and unsuited to random access applications. The CPU is slow ... display contends all of the RAM slowing the machine even further ...
    Matt_B Matt_B February 2011 Hardware
  • Was the +3 a missed opportunity?I just wanted to gauge WOS opinion on this. Do people think that the +3 was a bit of disappointment that didn't really advance the hardware as much a…

    ... unreliable and unsuited to random access applications. The CPU is slow ... display contends all of the RAM slowing the machine even further ...
    Paddy Coleman Paddy Coleman February 2011 Hardware
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... " when it makes ULA memory access NON-sequential :)

    Anyway ... even a single byte of RAM cannot be better than the ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... the use of the available RAM, but this also slows things ... down as the contents of RAM are bumped dynamically around in ... linear. Hence jumps, functions, variable access etc. are handled on an ...
    RST#08 RST#08 February 2011 Sinclair Basic
  • 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…

    ... , as I don't have access to any PC around that ... GB
    Memory: 256 MB RAM
    Other: Internet Connection, DVD ... recommended)
    512 MB of RAM (1 GB recommended)
    DirectX ... AMD equivalent or equivalent
    RAM:
    256 MB
    Video ...
    ewgf ewgf February 2011 Chit chat
  • Chase HQ Pseudo 3d road algorithm ?Hello, I'm new to that forum and to the spectrum. I'm developping games for Colecovision (may be you hear about : Ghost'n Zombie and Smurf challe…

    ... MHz), and allow to access video RAM during raster without slowdowns? And ...
    Shiru Shiru February 2011 Development
  • 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…

    ... so long as you have access to a disk drive you ... 6809 system with 64K of RAM. It didn't multitask, but ...
    wilsonsamm wilsonsamm February 2011 Development
  • 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…

    ... so long as you have access to a disk drive you ... 6809 system with 64K of RAM. It didn't multitask, but ...
    tstih tstih February 2011 Development
  • Zetr0's Catchup Time (hardware / software)Hello there my fellow ZX'ers I have been soaking myself into the "world of spectrum" and more I do, the more I realize I have to play catchup.... a …

    ... ?
    2. or is the access limited to only 32MB?
    ram (or run from the spectrum ... 's own ram, but getting it there after ...
    guesser guesser March 2011 Development
  • Android Padi was thinking of getting one of these for a few reasons, the main being im gonna be going into hospital for ages and ages and i wanted someway to pl…

    ... Ebay. 1ghz processor, 512mb of ram, 1024*600 screen, 4gb internal ... it as a primary internet access device, or for playing games ... - 12" screen, 1.5gb of ram, 1.6ghz Pentium M processor ...
    j00ce j00ce March 2011 Emulators
  • Android Padi was thinking of getting one of these for a few reasons, the main being im gonna be going into hospital for ages and ages and i wanted someway to pl…

    ... Ebay. 1ghz processor, 512mb of ram, 1024*600 screen, 4gb internal ... it as a primary internet access device, or for playing games ... - 12" screen, 1.5gb of ram, 1.6ghz Pentium M processor ...
    takapa takapa March 2011 Emulators
  • simple things that get you..after rebelstar's thread here's another confessional type one... simple things, that well. get you.. here is my example... where I am currently has…

    ... 's got GPS, has web access, has photos of your kids ... of the RAM in his machine (system RAM, video RAM, soundcard RAM, etc) and ...
    ewgf ewgf March 2011 Chit chat
  • 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 …

    ... of us have fairly limited access to hardware, so it's ... M has 64 KiB of RAM, but apparently only 48 KiB ... of the Didaktik Gama's RAM must be usable, though.
    zub zub March 2011 Hardware
  • VIC-20 MegathreadWasn't the VIC-20 just a top machine? Discuss.

    ... a joystick and with unexpanded RAM I could not play that ... who had the lot - 16K RAM pack, joystick, multiple game cartridges ... arcade fun I only had access to "Cosmic Cruncher", rather than ...
    Digital Prawn Digital Prawn April 2011 Chit chat
  • The c64 threadOK, I don't want to compare the systems, it's been done to death and I really really don't care. But - there's great games on the Speccy that were pa…

    ... basic and you get access to far more ram ;) . which is good ...
    fog fog April 2011 Chit chat
  • can we all agree on a game we liked?reading some of the console mega threads, and from my own personal experience it seems that ones mans treasure is another mans poop stain. so can we…

    ... those, many didn't have access to the memory pak.
    RAM. You corrected me, and I ...
    ewgf ewgf April 2011 Chit chat
  • DivIDE questionsHi All, I'm the proud owner of two DivIDE interfaces, that I have just "inherited" from a friend. One of them is the original one and the other one …

    ... corruption of the battery backed RAM on the DivIDE Plus, so ... which uses the battery backed RAM).[/quote]

    Battery ... DivIDE+ is less susceptible to RAM corruption than that device, but ... OS. Since you obviously have access to the devices and the ...
    chev chev April 2011 Hardware
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