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Search Again :: Adv Search 1000 results in 0.014s
<1…16171819202122…34>
  • New project: CargandoLeches. Ultraloads with ROMHi This project has started months ago, between decicoder, macleod and me. Uses the best modulation of k7zx (throwing shavings). But this ultraloa…

    ... that allows RAM in lower memory (so it works by emulating ... 16kB ram page in external DIVIDE PLUS memory 512kB.
    If you ...
    velesoft velesoft March 2012 Development
  • 3D Deathchase on the Commodore 643D Deathchase has been ported to the C64, at least according to Micro-Mart. According to this week's MM, the port is called Hell Racer, and here's a …

    ... , yet hampered by less memory? Surely if Commodore's ... from not using an external colour RAM like the ... It was hampered with less memory because it was meant ... C16 have literally 16k of memory? If so, then ... large percentage of the memory, leaving little space for ...
    TMR TMR April 2012 Games
  • ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …

    ...
    To page your memory, intercept the M1 cycle at ... you can activate your memory at the leading edge ... cycle and therefore your memory can supply the instruction ... recommended to use an external P-channel MOSFET or ... to 1 when your memory is paged in). This ...
    Winston Winston April 2012 Hardware
  • ROM switch on NMIHello! Please, help me or point in the right direction. I am building a project for 48k spectrum which must activate its rom (actually static ram) …

    ... ;617766]
    To page your memory, intercept the M1 cycle at ... the address to the
    memory has had time to stabilize ... 's recommended to use an external P-channel MOSFET or PNP ...
    ArtemKuchin ArtemKuchin April 2012 Hardware
  • Help pleeease "Proving Emulator OpCode flags are correct"So I had a cunning plan... I wanted to write a test harness for Emulators that could "prove" that all opcode flags were correct. I wanted something m…

    ... poking the value in three memory addresses takes 6 seconds. Multiply ... . There are bound to be external factors which [I]can [/I ... a while...

    The memory between 65024 and 65535 will ...
    Stefan Drissen Stefan Drissen April 2012 Emulators
  • 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…

    ... (in other words, instruction memory and data memory are completely separate, and ... possible to load programs from external storage as is possible with ...
    Winston Winston April 2012 Chit chat
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... large dictionaries require large memory and supporting quick tokenizers ... One last caveat :- bankswitched memory is hard to deal with ... with access to unlimited bankswitched memory.[/QUOTE]

    ... limitation. Even with unlimited external store, you've still ...
    chev chev May 2012 Sinclair Miscellaneous
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... 625237]One last caveat :- bankswitched memory is hard to deal with ... not easy like a flat memory model. The hard 64k limit ... bankswitched memory.[/QUOTE]

    [QUOTE=aowen;625313]Even with unlimited external ... the need to think about memory as we do when ...
    zxbruno zxbruno May 2012 Sinclair Miscellaneous
  • Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…

    ... ). Also is implement DivIDE memory paginga and MB02+ memory paging (true allram ... external devices. PROFI INTERFACE is full reprogrammable from PC via cable = memory ...
    velesoft velesoft May 2012 Hardware
  • In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…

    ... something else? What about dynamic memory, is it allocated top-down ... memory area? Is it possible for a compiled program to use external ... , and how can it reserve memory areas for them? What about ...
    Einar Saukas Einar Saukas May 2012 Development
  • In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…

    ... something else? What about dynamic memory, is it allocated top-down ... memory area? Is it possible for a compiled program to use external ... , and how can it reserve memory areas for them? What about ...
    Raydac Raydac May 2012 Development
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... sound down when using an external MIDI device). The SPECTRUM command ... doesn't have to do memory paging in odrer to tokenize ...
    chev chev June 2012 Announcements
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... br />
    well, programming external command for esxdos is quite ... easy task. external program is binary file, ... demand, as all external commands shares the same memory area.
    ... variables and expressions, as external command is executed from ...
    ub880d ub880d July 2012 Announcements
  • Help with a Moded Xbox (original) I think?Help! I have purchased an Xbox crystal (Boxed) off Ebay and upon receiving it I noticed it had been moded well I say moded it has three switches s…

    ... executer mod chip with an external switch (hence the led's ... a chip,but if my memory serves me correctly them chips ...
    bully bully July 2012 Chit chat
  • 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 …

    ... tasks like read to memory, write to memory, acknowledge interrupt, etc, are ... hardware designers as external hardware has to recognize when memory is read ...
    Alcoholics Anonymous Alcoholics Anonymous July 2012 Development
  • Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…

    ... load easy select number of memory page with rom. In rom ... writeprotect can be active MB02 memory mode (512kB flash eeprom + 512kB ... rom, then can disable memory access for all external devices (PROFI set ... and ignore ROMCS line from external devices)
    velesoft velesoft August 2012 Hardware
  • Something that just occured to me (Windows 8 related)Even though personally I probably won't be putting Windows 8 on any of my PCs, as it offers no real advantage for me, I have to keep my hand in with …

    ... faster, uses less boot-up memory, runs less services, etc.
    external hard-drive they run concurrently ... so that the external hard drive is constantly having ...
    takapa takapa August 2012 Chit chat
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... /> 000xxxxx Kempston
    xxxxxx0x AY/Memory Paging
    xxx0xxxx ZXCF
    0001xx1x Kempston
    xxx1xx0x AY/Memory Paging
    xxx0xx1x ZXCF

    External Divide will possible connect only ...
    velesoft velesoft December 2012 Hardware
  • How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…

    ... a Spartan-6 FPGA *including* memory for a 48K model. Without ... have to be a few external components.
    Winston Winston December 2012 Hardware
  • 16k --> 48kI bought a zx and found out it was a 16k since when I execute PRINT PEEK 23733 I get 127 Does it mean I get a lesser model? What limitations do I h…

    ... I do. There are also external expansions, but I don't ... =0&turns=0&memory=1&language=0& ... : you can filter results by memory size.
    snigfarp snigfarp December 2012 Hardware
  • TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…

    ... />
    My old version of external 128kB upgrade support also ROM ... interest will version with one memory socket (for sram+flash eprom ...
    velesoft velesoft December 2012 Hardware
  • Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…

    ... . However, most FPGAs need an external flash chip and have to ... tables can be used as memory (Xilinx calles it "distributed RAM ... example the Spartan 3 (if memory serves) has a 4 input ...
    Winston Winston January 2013 Hardware
  • Can't downloadHi there. I can't seem to download anything from the WOS archive. It seems to time-out or something. I have a fien intenret conection and can down…

    ... your computer or to some external device?

    The computer ... to a USB-connected memory stick or external HD. I always get ...
    ZnorXman ZnorXman January 2013 Sinclair Miscellaneous
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    ... .

    info about divide memory 3Dxx mapping:
    - is't ... internal ZX rom and connect external divide rom+ram. Problem can ...
    velesoft velesoft January 2013 Hardware
  • Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…

    ... .

    info about divide memory 3Dxx mapping:
    - is't ... internal ZX rom and connect external divide rom+ram. Problem can ...
    1024MAK 1024MAK January 2013 Hardware
  • maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …

    ... to do some processing & memory access on its own. For ... ]
    That's how MSX2 memory mappers work. Discrete logic implementations ... internal + 1 or 2 MB external is the biggest you'll ... />
    But despite 4 MB. memory mappers existing for decades (and ...
    RetroTechie RetroTechie February 2013 Hardware
  • Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…

    ... it will destroy every memory content from the beginning ... code writes to every memory location from 0000 so ... 3, or if some external device puts it into the ... whenever there is a memory access to 0000-3FFF ... each and every ROM memory location, everytime a write ...
    mcleod_ideafix mcleod_ideafix February 2013 Sinclair Miscellaneous
  • Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…

    ... , as it will destroy every memory content from the beginning of ... ]Your code writes to every memory location from 0000 so it ... +2A/+3, or if some external device puts it into the ...
    Timmy Timmy February 2013 Sinclair Miscellaneous
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... RAS signal to cause the external multiplexors to expose one half ... the time from the last memory access before pulling RAS down ... about to start a video memory read. During that time, the ...
    mcleod_ideafix mcleod_ideafix March 2013 Hardware
  • Multiface +3 AdviceHi, New to the forum after resurrecting my +3 and looking for a bit of advice on the Multiface 3 please. Quite simply is it worth investing in for…

    ... />
    First of all - purchase external 3.5 inch floppy drive ... switches you can convert your external 3.5" drive into A ... your 3.5" diskette into external 3.5" drive and copy ... be loaded to bottom 16k memory.


    128K games ...
    ikci ikci March 2013 Hardware
<1…16171819202122…34>

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