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<1234567…34>
  • Utility to read/write to memory cards formatted for +3EThis post comes from [url=http://www.worldofspectrum.org/forums/showthread.php?t=25658]this thread[/url]. I've released a small command-line utility…

    ... disk and write them into a +3DOS partition inside the memory card ... programmer can write a nice GUI for handling +3E formatted memory cards ... and file name on your memory card / disk image.
    - ... added upon writting to the memory card /image disk.
    - ...
    mcleod_ideafix mcleod_ideafix July 2009 Emulators
  • Dell Dimesion 8300 - Blue Screen of DeathOver the last couple of weeks I have been attempting to fix a Pentium 4 Dell Dimension 8300 belonging to a blind frienrd of mine. I kept getting the…

    ... br />
    Memort Write/Read error at **SOME MEMORY ADRESS**

    memory was not to fault.
    existing memory and CPU. I am still ... that be causing the read write errors and the blue screens ...
    Scottie_uk Scottie_uk November 2007 Chit chat
  • 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…

    ... , if you want to write to the memory of CPU1, then simply ... be able to write multiple values in adjacent memory locations, by having ... , if we replace the existing memory with faster memory, would we then be ...
    wilsonsamm wilsonsamm June 2009 Hardware
  • Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…

    ... bytes) and start to write all over whole existing memory.

    As ...
    Ralf Ralf September 2016 Development
  • Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …

    ... breakpoints for specific values read/write from memory, ports etc.
    + Monitor ... view to reflect the latest memory state.
    - Fixed incorrect emulation ...
    Arjun Arjun January 2013 Emulators
  • Fuse tests - INC BC causes contention delayHi all, In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC): 0 MC 0000 4 MR 0000 03 4 MC 0001 …

    ... /> is one of MR (memory read), MW (memory write), MC (memory
    contend), PR ... (port read), PW (port write) or ... it need to read the memory to update the registers??
    garethadams garethadams July 2015 Emulators
  • I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…

    ... both interface to the memory, meaning that they have ... is why part of the memory is contended.
    Alternatively ... it wants, and can write to memory when it has the ... has time to write it to the memory. So the ... the ULA is a "write only" memory chip. The CPU can ...
    wilsonsamm wilsonsamm August 2015 Hardware
  • Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…

    ... lines specifying the initial memory setup. Each has the ... one of MR (memory read), MW (memory write), MC (memory contend), PR (port ... read), PW (port write) or ... specifying which bits of memory have changed since the ...
    Philip Kendall Philip Kendall July 2004 Development
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... : the data from the video memory
    (16384-23296) is ... right border) ULA try read memory page (16384-32767}. if CPU ... same page (that means write to memory, read memory or just execute instruction ... (call,push,pop,ret acces memory on SP pointer}, speed critical ...
    Fikee Fikee August 2004 Development
  • "Name That Game" databaseAs often (sometimes?) requested, I present a first pass at a [url="http://www.srcf.ucam.org/~pak21/spectrum/namethatgame"]Wos Forums Name That Game d…

    ... but many people do not write their memory clues about the game ...
    alban lusitanae alban lusitanae May 2005 Games
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... which sprite to display... one write to memory.
    JamesD JamesD September 2006 Sinclair Miscellaneous
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... which sprite to display... one write to memory.[/QUOTE]

    (Edit ...
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... ]In many cases, if memory is faulty, this routine ... scheme to determine how much memory is fitted. The tedious ... and largely pointless memory test sequence performed by PC ... Having been required to write a memory testing algorithm that can accurately ...
    Laser Laser August 2007 Sinclair Miscellaneous
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... the memory address by 1 with each read or write ... don't have to write the memory address you want ... address with every read or write anyway!

    ... /> So this probably means memory mapped mode is likely the ... be possible to use memory mapped mode, but use ...
    Winston Winston November 2007 Hardware
  • Problem upgrading 16K SpectrumHello Spec-chums, I've been a long time Commodore user, but also a long-time Speccy admirer (and emulator user). I've recently got hold of a Issue 2…

    ... you did, you can write a memory test program to find the ...
    Winston Winston October 2008 Hardware
  • Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…

    ... fastest way to read and write to memory, faster than the sensible ...
    gasman gasman January 2009 Development
  • z80 format: ED ED xx yyI've just been studying the documentation for the z80 file format: [url]http://www.worldofspectrum.org/faq/reference/z80format.htm[/url] I have a d…

    ... != 65536:
    sys.stderr.write("ERROR: Memory size is %i\n" % ... zxlib

    header, memory = zxlib.get_snapshot('some.z80')
    # Muck about with memory and header as you wish ... 34] = [0, 128]
    # memory[30464] = 201

    ...
    SkoolKid SkoolKid July 2009 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... when you want to read/write large memory areas to a file ... didn't attempt to read/write across any 16K boundary, and ...
    glancaster glancaster July 2009 Development
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... of EPROM's programmed with memory tests I've written, specially ... the moment I have to write to memory to actually test it ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • memoryprobably a dumb question i have 1gb memory in my PC, if i buy another 1gb memory (the same one i bought before.) and plug it into the other slot, do…

    ... same colour slot as your existing memory slot. In some cases it ... centre key-way on your memory. Make sure you put it ... in each side of the memory. It it has not clicked ... see your computer has more memory.
    Scottie_uk Scottie_uk June 2010 Chit chat
  • memoryprobably a dumb question i have 1gb memory in my PC, if i buy another 1gb memory (the same one i bought before.) and plug it into the other slot, do…

    ... same colour slot as your existing memory slot. In some cases it ... if going to use dual memory (or what it now is ...
    MinerWilly MinerWilly June 2010 Chit chat
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... to computer:
    >Manipulate memory
    >Artihmetic functions
    write to memory and a device connected ...
    Robin Robin October 2010 Chit chat
  • Fuse: what do you want to see?An open brainstorm. If you had a team of programmers working on [url=http://fuse-emulator.sf.net/]Fuse[/url], what would you tell them to work on? …

    ... interface: read registers, write to memory, load from memory, set breakpoint and jump ... />
    This way one could write gdb compatible debugger being capable ...
    tstih tstih March 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... that affect flags? Even if memory cell is not altered because ... it complicated, just make all memory writes byte by byte and ... Z80 will always try to write into memory, and won't know ... does (changing the flags, loading memory values into registers, etc...) will ...
    Metalbrain Metalbrain September 2011 Emulators
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... yy have 'weird' values, write to memory locations outside the display area ...
    RetroTechie RetroTechie October 2011 Development
  • probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…

    ... yy have 'weird' values, write to memory locations outside the display area ...
    guesser guesser October 2011 Development
  • Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…

    ... your own RAM over the existing memory, and monitoring read/writes to ...
    RobeeeJay RobeeeJay January 2012 Hardware
  • 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 …

    ... , macro tasks like read to memory, write to memory, acknowledge interrupt, etc, are ... hardware has to recognize when memory is read/written, for example ...
    Alcoholics Anonymous Alcoholics Anonymous 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 …

    ... :
    1. A fetch (from memory) stage
    2. A decode ... , say those that read and write from memory, take more T-states ... , and whether it reads/write to memory or IO will give an ...
    csmith csmith July 2012 Development
  • Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.

    ... 48Kb.

    They write that memory may be a problem - of ...
    Ralf Ralf August 2012 Games
<1234567…34>

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  • Utility to read/write to memory cards formatted for +3EThis post comes from [url=http://www.worldofspectrum.org/forums/showthread.php?t=25658]this thread[/url].<br /> <br /> I've released a small command-…
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