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  • Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…

    ... can only handle 64K of memory. There are several methods to ... is called paging.

    Memory in the 128K models is ... pages. Half those pages are contended memory, which means that the timing ... .

    Page 2 is contended as it contains the video ...
    na_th_an na_th_an January 2013 New game ideas
  • Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…

    ... only use of the extra memory in the 128K models is ... to make extensive use of contended memory. It's not a big ...
    na_th_an na_th_an February 2013 New game ideas
  • Issue 2 weirdness[youtube]2vLT_jz4Qqc[/youtube] This usually resets it but this time it did that. With the 128k ram tester I get this; [url=http://postimage.org/imag…

    ... in one of your non contended memory chips (IC15 to IC22).
    memory tester is surely the bad ...
    mcleod_ideafix mcleod_ideafix February 2013 Hardware
  • Changing the colour of the loading 'stripes'I was wondering if it were possible to alter the default colours of the standard ROM loading 'stripes' via BASIC, mabye a POKE command of some descri…

    ... /saving code cannot run from contended memory at 23762; the main code ... sits in upper memory from 65169 to 65535 so ...
    Andrew Barker Andrew Barker February 2013 Sinclair Basic
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    ... br /> This ensures all memory vectors (and pages) are ... is the organization of contended memory - contended memory means where the ... will determine what memory pages are contended. Now some ... software is clever and can ascertain what memory ...
    Zetr0 Zetr0 March 2013 Hardware
  • +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…

    Contended Memory
    See [URL]http://www. ... , IC25 to IC32 form the Contended Memory (64k bytes of RAM).
    Memory (64k bytes of RAM).

    Spectrum +2 memory map
    [URL]http://www ...
    1024MAK 1024MAK March 2013 Hardware
  • +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…

    [QUOTE=1024MAK;691204]Contended Memory
    See [URL]http://www. ... , IC25 to IC32 form the Contended Memory (64k bytes of RAM).
    Memory (64k bytes of RAM).

    Spectrum +2 memory map
    [URL]http://www ...
    xaris_sm xaris_sm March 2013 Hardware
  • Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…

    ... perfectly emulates a TK90X for contended memory and contended input port *FF, but ... for "snow effect NOP" and contended input port *FE.

    Einar Saukas Einar Saukas April 2013 Emulators
  • CyberbigI found out that Cyberbig is affected by snow effect in FBZX Wii. There is snow in the all screens except in the main menu. I checked that also Spe…

    ... the bank paged is a contended bank. The [URL="http://www ... is set to point to contended memory still occurs, and also appears ... is set to point to contended memory.[/quote]

    but some ... paged is changed to a contended page and this interacts with ...
    zx81 zx81 April 2013 Games
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... ]Games that crash because of contended memory.[/thread]
    Jmk Jmk May 2013 Games
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... ]Games that crash because of contended memory.[/thread][/QUOTE]

    Thanks ...
    Ivanzx Ivanzx May 2013 Games
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... the decompressor fit in the (contended) 16k ZX version to produce ... you run this in a contended memory, the sound quality would suffer ... to fit into the available memory footprint: [url]http://alonecoder.narod ...
    introspec introspec May 2013 Development
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... . Now, Scorpion does not have contended memory (many Russian clones don't ...
    introspec introspec May 2013 Development
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... ]Games that crash because of contended memory.[/thread][/QUOTE]

    I ...
    Ivanzx Ivanzx June 2013 Games
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... according to the contended memory table, trying to access contended memory at cycle 14335 ... example, HL also references a contended memory address (26000), which means ... according to the contended memory table, trying to access contended memory at cycle 14345 ...
    Einar Saukas Einar Saukas June 2013 Development
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... allow you to switch off contended memory (e.g. SPUD) and if ... you play Jet Pac with contended memory off you get a 25 ...
    Korinel Korinel June 2013 Development
  • 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…

    ... address and use the same contended memory rules as I did for ... (I appreciate it's never contended)?

    How do you ...
    Korinel Korinel June 2013 Emulators
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... allow you to switch off contended memory (e.g. SPUD) and if ... you play Jet Pac with contended memory off you get a 25 ...
    rich_chandler rich_chandler June 2013 Development
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... allow you to switch off contended memory (e.g. SPUD) and if ... you play Jet Pac with contended memory off you get a 25 ... ;postcount=2]Deathchase out of contended memory.[/url]
    Bandit Bandit June 2013 Development
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... ;postcount=2]Deathchase out of contended memory.[/url][/QUOTE]

    Slight ...
    jp jp June 2013 Development
  • 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…

    ... address and use the same contended memory rules as I did for ... (I appreciate it's never contended)?
    [/quote]

    No ...
    Arjun Arjun June 2013 Emulators
  • 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…

    ... the execution cycles are all contended based on the IR value ... when IR points to the contended memory?
    introspec introspec June 2013 Emulators
  • 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…

    [QUOTE=introspec;708067]Do I understand correctly that this is only relevant when IR points to the contended memory?[/QUOTE]

    Absolutely. The ULA isn't going to apply contention when the address on the bus isn't one it thinks is contended!
    Philip Kendall Philip Kendall June 2013 Emulators
  • 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…

    ... check if the access is contended and if so I slap ... for a "if access is contended then behave differently" condition then ... /> I think that emulating the contended memory behaviour relies more on emulating ...
    pkersey pkersey June 2013 Emulators
  • 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…

    ... for a "if access is contended then behave differently" condition then ... /> I think that emulating the contended memory behaviour relies more on emulating ...
    Arjun Arjun June 2013 Emulators
  • 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…

    ... for a "if access is contended then behave differently" condition then ... /> I think that emulating the contended memory behaviour relies more on emulating ...
    guesser guesser June 2013 Emulators
  • 16K/48K Lower RAM (4116) replacement.You may want to read [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37957"]this thread[/URL] for background information on the quest t…

    Although non-contended RAM (4532 chips) seem to ... board to replace the non contended memory bank?

    PS: your ... /simm-adapter-for-replacing-lower-memory/13-making-it-pretty[/url ...
    mcleod_ideafix mcleod_ideafix July 2013 Hardware
  • 16K/48K Lower RAM (4116) replacement.You may want to read [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37957"]this thread[/URL] for background information on the quest t…

    [QUOTE=mcleod_ideafix;709022]Although non-contended RAM (4532 chips) seem to ... board to replace the non contended memory bank?[/QUOTE]

    Such ...
    Zorn Zorn July 2013 Hardware
  • Issue 2 black paper white borderGot an issue 2 here that has a 6c001e ULA, no cockroach, no transistor mod (although you can clearly see on the top of the z80 and on some legs, some…

    Only puzzle was, why did i still get no copyright screen or display in the memory test rom? If the lower 16k is good, i should get that i thought. As it stood, if it was someone else they might have been desoldering IC9 for nothing
    Macc Macc July 2013 Hardware
  • Spectrum loading: the single 'note' soundHello everyone, can anyone explain what is happening when during loading, the tape emits what seems to be a single, usually high pitched note, in bet…

    ... at #0556 and #04C2 (from memory). Some of the Wossers here ... routines to high memory ("high", as in out of contended memory >= 32768 ...
    DEATH DEATH July 2013 Hardware
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