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Search Again :: Adv Search 1000 results in 0.002s
<1234567…34>
  • RZX for Sabre WulfI was just about to send an RZX for Sabre Wulf to the RZX Archive when I noticed they don't accept Ultimate's (and other companies' who haven't given…

    ... got the whole issue of contended IO timings to deal with, which ... less researched and emulated than contended memory timings.
    Philip Kendall Philip Kendall October 2004 Games
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... 8 are contended, but for the IO part of an IO instruction, the ... -states [I]before[/I] the contended memory T-states. See [url ... byte fetch when doing a contended IO read of the floating bus ... (because that T-state is contended by the memory contention!!)
    csmith csmith September 2007 Emulators
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... 8 are contended, but for the IO part of an IO instruction, the ... byte fetch when doing a contended IO read of the floating bus ... will have to look at contended IO myself, I was focusing mostly ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... state and hence will be contended, so clearly the FAQ is ... that. So at least 3 contended T-states must pass before ... being fetched during contended IO.

    Thus the IO contention I describe ... will have to look at contended IO myself, I was focusing mostly ...
    csmith csmith September 2007 Emulators
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    It's the new contended memory test I wrote this afternoon that I'm interested in here (although the contended IO one may be interesting as well) :-)
    Philip Kendall Philip Kendall September 2007 Emulators
  • IF1 and IO portsThe Interface used 3 Z80 IO ports to communicate to it s devices #E7- Microdrive data #EF- Status and control #F7- RS232/Network What I'm looking…

    The Interface used 3 Z80 IO ports to communicate to it ...
    john john March 2001 Sinclair Miscellaneous
  • Games that crash because of contended memory.I find these are really annoying. You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so on (the init…

    ... the +2A/+3 having different contended banks...

    Anyway, I ...
    Jmk Jmk February 2006 Games
  • R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …

    ... . What is the effect of contended RAM on the R-register ... not run any code in contended RAM, but I do make ... thing, but then without the contended RAM the HALT would take ...
    icabod icabod July 2006 Development
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    ... ULA IO and memory contentions are faithfully reproduced,
    along with contended ...
    csmith csmith July 2007 Hardware
  • IO Error on erzxternal hard driveI have an external hard drive that I plug in to my PC's via a powered USB 2.0 port. It has been working fine for about 18 months or so. However lata…

    ... of it I get an IO error.

    However, when ...
    Scottie_uk Scottie_uk February 2008 Chit chat
  • Z88DK - file IO on a plus 3So I have this very simple program, and it doesn't want to open a file for writing: [code] #include <stdio.h> #include <stdlib.h> void main() { FI…

    ... /> printf("\x1B[2JTest of file IO\n");
    stream=fopen("foo ...
    Winston Winston May 2008 Development
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…

    ... describes the detailed timings of contended RAM. It gives timings ... residing in, or reading/writing, contended RAM.

    ... LDIR instruction in non-contended memory, and the source ... and destination (DE) addresses in contended memory.

    Machine ...
    ajmoss ajmoss June 2010 Development
  • IO controller on EbayHas anybody seen this on Ebay: [url]http://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-IO-Controller-Kit-Instructions-/230653395193?pt=UK_VintageComputin…

    ... .uk/itm/Sinclair-ZX-Spectrum-IO-Controller-Kit-Instructions-/230653395193?pt ...
    Neil L Neil L August 2011 Hardware
  • Quick question regarding contended memoryIf I've read the documentation correctly, the following applies: 128k/+3 "Memory banks 1,3,5 and 7 are contended" +2A/B/+3 "RAM banks 4, 5, 6 and 7…

    ... ,3,5 and 7 are contended"

    +2A/B/+3 ... , 5, 6 and 7 are contended."

    That means, that ...
    Sdw Sdw May 2012 Development
  • +2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…

    ... some quenstions about,

    contended RAM are banks 1,3 ... logic

    now psysical, contended RAM are the IC's ...
    xaris_sm xaris_sm March 2013 Hardware
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... be an issue with the contended memory not working as it ... [/url]

    I implemented contended memory simplistically but I'm ... check if the access is contended and if so I slap ... an index.

    My contended table is correct.
    My ...
    Korinel Korinel June 2013 Emulators
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... I/O ports would get contended) forming part of a very ... activating and causing some random IO function to be activated (hence ... perfectly (well, now with incorrect IO contention due to the absence ... ULA to sometimes see spurious IO requests, causing the odd ...
    Winston Winston December 2013 Hardware
  • Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…

    ... findings. I've been investigating contended memory timings on the Timex ... whether the CPU is accessing contended video memory or "uncontended" ROM ... might as well call this "contended ROM".

    This solves ...
    rga24 rga24 May 2014 Hardware
  • IO Ports (Spectrum)Hi all, Working on a new Spectrum interface card I have the prototype powered up and basically working.......but I want to play with the IO addressi…

    ... want to play with the IO addressing such that I choose ... likely to conflict with other IO devices.

    I know ... rest...........but is there an IO map around that lists a ... common hardware vendors and the IO ports they use so I ...
    IanJ IanJ August 2014 Hardware
  • ZX Evolution -- contended memory and raster emulationFresh bleeding update for [url=http://www.nedopc.com/zxevo/zxevo_eng.php]ZX Evolution[/url] [url=https://code.google.com/p/pentevo/source/list]Baseco…

    ... [/url] -- raster and ULA contended memory emulation for original 48k ... rasters.

    2. Contended memory works only if you ... : for some help with raster/contended memory

    Mike ... your very valuable insight into contended memory topic and useful ...
    lvd lvd January 2015 Hardware
  • Contended memory and TritoneQuick question regarding contended memory...<div style="font-style: normal;"><br></div><div style="font-style: normal;">I'm testing ideas with Triton…

    Quick question regarding contended memory...
    I'm testing ... address and the data in contended memory, and it doesn't ...
    reidrac reidrac June 2015 Development
  • Don´t miss anything with visualping.io - Website-MonitoringThis Service will send you an notification email when a website or Forum has changed. So you don´t have to visit every day to have a look for it. Not…

    ... find VISUALPING Service: https://visualping.io/
    Luzie Luzie February 2017 Chit chat
  • ZX Spectrum BASIC game jam over on itch.ioHello, everyone. Apologies for the prolonged absence. (It's been almost 4 years, yikes!) Just wanted to let everyone know there's a [url="https://itc…

    ... 's a [url="https://itch.io/jam/zx-spectrum-basic-jam ... jam[/url] starting on itch.io on June 1st -- in less ...
    Felix Felix May 2017 Announcements
  • itch.io "Bundle for Racial Justice and Equality"So I bought this thing, but it seems out of control. [url=https://itch.io/b/520/bundle-for-racial-justice-and-equality]This bundle[/url] was launc…

    ... .

    [url=https://itch.io/b/520/bundle-for-racial ... ", so any developer on itch.io can include their product on ... .

    A question: itch.io has some ZX Spectrum games ...
    Zup Zup June 2020 Chit chat
  • Any retro styled games on itch.io, pico8, webgames etc. remade on ZX Spectrum?The last few yeas there have been many retro styled games released as webgames. Often these type of games are relatively simple but have innovative g…

    ... :

    * [url="https://itch.io/games/platform-web/tag-retro ... "]itch.io[/url] - website for indie game ...
    BdR BdR July 2021 New game ideas
  • Maplin IO Controller for ZX Spectrum (1985)Hi all, Does anybody still have have a Maplin IO Controller (could be bought as a kit or readymade) from the Maplin March-May 1985 magazine. This wa…

    ... still have have a Maplin IO Controller (could be bought as ...
    gg3390 gg3390 January 2022 Hardware
  • SpecEmu 2.1 betaFinally I think I've cracked all the gory contention details required by those trendy multicolour demos (48K/128K modes only, +3 contention can wait …

    ... of which is contended, and another is non-contended, entire instruction is ... instruction is located in a contended memory, I find that ... itself is executed from non-contended memory: in my opinion ... pc:4;pc+1:5;io:3. But in the ... pc:4;pc+1:4;io:4. Though an effect ...
    Vladimir Kladov Vladimir Kladov May 2004 Emulators
  • SpecEmu 2.1 betaFinally I think I've cracked all the gory contention details required by those trendy multicolour demos (48K/128K modes only, +3 contention can wait …

    ... itself is executed from non-contended memory: in my opinion ... Actually, port 7ffd is *not* contended, despite previous assertions that it ... looks like an address in contended memory to the ULA... ... pc:4;pc+1:5;io:3. But in the ... pc:4;pc+1:4;io:4.
    [/quote]
    ...
    Philip Kendall Philip Kendall May 2004 Emulators
<1234567…34>

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  • R Register, Contended RAM and ClonesHi.<br /> I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - …
  • IO Error on erzxternal hard driveI have an external hard drive that I plug in to my PC's via a powered USB 2.0 port.<br /> <br /> It has been working fine for about 18 months or so. …
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