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<1…13141516171819…34>
  • No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…

    ... magic wand to remove the memory contention, what software would break ...
    cbmeeks cbmeeks November 2015 Development
  • New version emulator ZEsarUX-4.0Hi I have uploaded a new version of my emulator ZEsarUX 4.0. You can download it from the project web page: http://sourceforge.net/projects/…

    ... Chip emulation
    Added Allow Write on ROM setting
    Added ... mode 512x192
    Fixed contended memory timings on Spectrum 128k and ...
    chernandezba chernandezba March 2016 Emulators
  • New debugger features for ZEsarUX-4.1Hi I haved added new breakpoint conditions on ZEsarUX, the following 8 allow to put a breakpoint when accessing memory or i/o ports: MRV: value…

    ... put a breakpoint when accessing memory or i/o ports:< ... br /> MWV: value written on write memory operation
    MRA: address ... br /> MWA: address used on write memory operation
    PRV: value ... br /> PWV: value written on write port operation
    PRA: ...
    chernandezba chernandezba March 2016 Emulators
  • Britsoft - Read-Only Memory Publishing"Britsoft" by Read-Only Memory Publishing is their latest book charting the rise and fall of game development in the UK from the early 80s to the end…

    "Britsoft" by Read-Only Memory Publishing is their latest book ...
    redballoon redballoon March 2016 Announcements
  • 48K Memory MapHi, I'm having some trouble understanding the top of the 48K Memory Map. From reading elsewhere I have this as the memory map: 0 to 16383 - …

    ... the top of the 48K Memory Map.

    From ... /> 0 to 16383 - Read Only Memory
    16384 to 22527 - Display ... br /> 23755 to 65367 - Available Memory
    65368 to 65535 - User ... area '23755 to 65367 - Available Memory'

    Also what ...
    jonesypeter jonesypeter March 2016 Development
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... emulator doesn't handle contended memory correctly, but relative differences are ... /2013/10/02/how-to-write-zx-spectrum-games-chapter-13 ... probably not worth the 6x memory.
    Sol_HSA Sol_HSA April 2016 Development
  • TommyGun with Debugginghttp://goo.gl/HfSXev?gdriveurl Ok, so this is a pretty big release for me and I have added a lot of stuff into the code editor. Mainly of course …

    ... ]
    Anyone who uses an existing debugger in an emulator will ... accurate.
    Does not have memory contention.
    Does not have ... /> Any feedback on useability (of existing features only) and bugs would ...
    Kiwi Kiwi July 2016 Development
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... (0-7) to map into memory at 0xc000.
    ; c = Bit ... /> ld b, 0x01 ; Value to write to the screen
    ld ...
    pointblnk pointblnk August 2016 Development
  • Speed (nano seconds) of memory chips ZX SpectrumThe ZX Spectrum uses 4116 memory for the lower memory, which can be replaced by other sorts or a whole, modern, module, but when searching for 4116 m…

    ... ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano seconds ... refreshed, the contents of the memory will get lost? 15ns? ...
    Same for the upper memory:
    TMS4532-3 Texas Instruments ...
    georgedb georgedb August 2016 Hardware
  • Some Graphic Coding & Audio help.Hello my fellow WoS'ers I am in the process of writing some code for graphical purposes - I have Z88DK raring to go but I do not know how to take…

    ... to take bytes from a memory file and put them on ... in regards to the +3 memory area(s).

    I ... ) that would allow me to write / experiment with AY-Synth - with ... />
    I am attempting to write a small graphical adventure game ...
    Zetr0 Zetr0 August 2016 Software
  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    ... regulator.
    Lower and upper memory modules from... http://zx.zigg ...
    RSwipeCA RSwipeCA August 2016 Hardware
  • So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…

    ... program to poke it into memory:
    (NOTE: i've chosen ... , there is no need to write any model-specific code to ...
    The_Bert The_Bert September 2016 Sinclair Basic
  • Time Gate graphics patchI've rediscovered Time Gate and one thing I don't like about the game is that it's hard to remember what's what in the status indicators. The manual …

    ... that it's useful to write them down, but I find ... UDGs then POKEs the right memory locations. I stop Time Gate ...
    textvoyage textvoyage October 2016 Games
  • Ordered tapes and memory links.I did something a bit sad this evening... In the old days of Spectrum, I used to keep my tapes in those little plastic cases / racks from woolies.…

    ... , I get a very strong memory of the time and the ... in order to keep the memory link up:
    I went ...
    Luny Luny October 2016 Sinclair Miscellaneous
  • Remake an existing game compo...For some reason I was inspired to post this because of the "[url="http://www.worldofspectrum.org/forums/discussion/16271/miss-wos-competition#latest"…

    ... instead remake something small and existing and on a tight deadline ...
    Sokurah Sokurah October 2016 Development
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    I was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of current technology. After a short google search here is what I found out.
    We are on a road to a real ...
    tstih tstih October 2016 Development
  • Why do we have to live with colour clash on the Spectrum Next - if it ever gets sold!I can fully sympathize with those who would like to see a 'new' Spectrum, presumably modelled on the last and best version with perhaps the option to…

    ... the extras, more memory, more speed, SD card read/write, various color ...
    mik3d3nch mik3d3nch November 2016 Chit chat
  • HILOW Interfaces informationHi recently i came across the HiLow tape interfaces, this units where build and sold on Uruguay by the same team that developed games like NarcoPoli…

    ... load. save "*programname" do a memory snapshot when the red button ... metod any speccy software can write to the tape drive.
    soviet9922 soviet9922 November 2016 Hardware
  • Contended Memory, literallyDoes anyone else have the sort of memory where they have trouble just picking out info cold? I know we had a discussion about memory sometime last mo…

    ... else have the sort of memory where they have trouble just ... we had a discussion about memory sometime last month, but...
    memory, but my brain wouldn't ... that's it, my association memory is broken. Its all there ...
    Luny Luny December 2016 Chit chat
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... fast and shows the copy write message, but the main screen ... . I removed all the upper memory but the fault is still ... this more likely a lower memory fault? or is my rom ...
    cypher007 cypher007 December 2016 Hardware
  • Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…

    ... ROM, which failed the upper memory RAM test, suspecting IC25 and ... high to enable the upper memory and under which conditions? Any ...
    protek protek January 2017 Hardware
  • How to write files from PC into a +3 disk image?I'm thinking about creating a utility that converts 48k snapshots into tap and dsk files. To do so, I've found that libspectrum allows me to read sna…

    ... any function to read or write data (there are some functions ... Elliot's libdsk has read/write data functions, but they're ... known locations so I could write directly onto that file using ... that allows to create / read / write files from a dsk or ...
    Zup Zup February 2017 Development
  • Memory questionsQuestion 1: PRINT PEEK 23732+256*PEEK 23733 returns 65535 for a 48K Spectrum and 32767 for a 16K Spectrum. PRINT PEEK 16388+256*PEEK 16389 return…

    ... mad as to try to write a program in BASIC so ...
    The Mighty Dopethrone The Mighty Dopethrone March 2017 Sinclair Miscellaneous
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    ... , again no problem, did the memory test....oh dear 16k.
    write a post on here asking ...
    povvercrazy povvercrazy April 2017 Hardware
  • 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…

    ... many operations (mostly graphics, but memory filling and allocation too)
    Fixed renumber for non-existing lines
    Fixed IN parsing ...
    Dunny Dunny April 2017 Sinclair Basic
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... because I wanted to write a routine like this ... />
    I did originally write the compressor in ASM for ...
    //
    // allocate enough memory for screen
    if((buffer ... printf("error: unable to allocate memory to store compression\n");
    TomD TomD April 2017 Development
  • Which existing games would you like to see enhanced and what would you add?Which existing games would you like to see enhanced and what would you add?

    Which existing games would you like to see enhanced and what would you add?
    retrogod retrogod April 2017 New game ideas
  • ZXUDGedit - Android app for making UDGsHello I made a little Android app for creating 8x8 Spectrum UDGs very quickly. It produces a binary file that can be loaded straight into a Spectrum…

    ... loaded anywhere into the Spectrum memory and this app does not ... is create a folder and write files in it. "Mileage might ...
    textvoyage textvoyage April 2017 Software
  • Tapes 85-88Hello! I am hoping this will be of interest to some of you. I've recently rescued everything I could from cassettes that have been sat in my loft …

    ... history of learning how to write games and trying (mostly failing ... C64 one. I have no memory of why it wasn't ... match highlights. We had big memory problems with porting this game ...
    Swanny Swanny April 2017 MIA/STP/SDP
  • 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…

    ... get my head around the memory contention issues of the various ... best use of the extra memory. I've searched the forums ... /> I can understand that the memory is divided up into banks ...
    adrian_singh adrian_singh May 2017 Development
<1…13141516171819…34>

Latest Posts

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    harriusherbartio on 11:01AM
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existing 3.7K 4.2K
memory 21.8K 32.5K

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