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Search Again :: Adv Search 1000 results in 0.102s
<1234567…34>
  • 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 for ... that are either residing in, or reading/writing, contended RAM.

    in non-contended memory, and the source (HL) and destination (DE) addresses in contended memory ...
    ajmoss ajmoss June 2010 Development
  • 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 ideas ... code after 0x7fff memory address and the data in contended memory, and it doesn ... being run from non contented memory, so I think it ... but it is actually broken in other models.
    Thanks ...
    reidrac reidrac June 2015 Development
  • 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…

    ... been investigating contended memory timings on the Timex Sinclair 2068, in particular what ... happens when you page in EXROM or cartridge memory in $4000 - $7FFF.
    contended video memory or "uncontended" ROM in the EXROM socket ...
    rga24 rga24 May 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…

    ... -- raster and ULA contended memory emulation for original 48k ... Contended memory works only if you have 48k or 128k raster (shown in ... : for some help with raster/contended memory

    Mike ... very valuable insight into contended memory topic and useful ...
    lvd lvd January 2015 Hardware
  • Loading a screen in to memory...Hi Folks, I want to load a SCREEN$ in to memory and save it out to RAM disk without it being displayed on the screen. I am worried about over writi…

    ... to load a SCREEN$ in to memory and save it out to ... worried about over writing BASIC memory so would the following work ... RAMTOP is the address held in the equivalent System Variable.
    Paddy Coleman Paddy Coleman December 2010 Sinclair Basic
  • 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 should ... [/url]

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

    My contended table is correct.
    My ...
    Korinel Korinel June 2013 Emulators
  • 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…

    ... the LDIR opcode is running in contended memory or not;
    [*] ... Source (HL) is pointing to contended memory or not;
    [*] whether ... (DE) is pointing to contended memory or not;
    [/list ... rendering immediately after a HALT you can reduce the ...
    BloodBaz BloodBaz June 2010 Development
  • What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…

    ...
    ei
    Forever halt
    jp Forever
    ... program running in contended memory, writting to contended memory (or at least, contended in the Sinclair ... we calculated for a non contended behaviour.

    ...
    mcleod_ideafix mcleod_ideafix December 2011 Hardware
  • Jet Set Willy Turbo edition!Improve the speed of the game with just a few pokes! Do the standard CLEAR 32767 : LOAD "" CODE to get at the BASIC loader (see Your Spectrum issue …

    ... back-buffer wasn't kept in contended memory) The LDI instructions are stored ...
    Jimmy Jimmy May 2011 Sinclair Miscellaneous
  • Pyskool 1.1.2Pyskool 1.1.2 has been released. Pyskool is a remake of Microsphere's Skool games written in Python and Pygame. It's designed to be very customisabl…

    ... Microsphere's Skool games written in Python and Pygame. It ... characters is determined by lines in plain text configuration files.< ... traditional songs) are done in the style of the original ... notes produced by code running in contended memory). Hopefully you'll be ...
    SkoolKid SkoolKid June 2014 Announcements
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... 4-7, the contended RAM.
    Normal memory paging is extended by ... Spectrum contended memory.
    D1 - selects the top 32k portion of RAM00 in ... have to execute in contended memory to do anything and in the high res ...
    cyborg cyborg October 2002 Sinclair Miscellaneous
  • 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 …

    ... is executed from non-contended memory: in my opinion these are ... Actually, port 7ffd is *not* contended, despite previous assertions that it ... this looks like an address in contended memory to the ULA... the ... right in this case as I/O operations are contended on ...
    Philip Kendall Philip Kendall May 2004 Emulators
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... to 6 tstates.

    In fact using LDIs are identical ... to using the Stack in this instance, in terms of speed.
    in contended memory, and this will have a ...
    dmsmith dmsmith September 2004 Development
  • SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …

    ... found so far run only in the top 32k then ?[/quote ... Set Willy. That lives purely in the upper 32k - 32768 to ... turbo loader could only live in contended memory.

    I successfully generated ...
    Lee Tonks Lee Tonks October 2004 Sinclair Miscellaneous
  • DEC BC/LD A,B/OR C/JP NZ,loopyesterday i saw nice trick:[code] dec bc ld a, b or c jp nz, loop can be replaced (bc starts >255, short jump) by: dec bc inc b djnz loop [/code] …

    Saves only 1 cycle when the branch is taken though. Also it would be far slower if the code was in contended memory.
    Woody Woody February 2005 Development
  • InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…

    ... service routine addresses overlap in the table. Combined ... store this as high in memory as possible to ... if the table is in contended memory, some Spectrum models will ... This is because during memory refresh the z80 puts ... there is a memory contention whem there ...
    Alcoholics Anonymous Alcoholics Anonymous February 2005 Development
  • How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…

    ...
    (if Programm Counter is in contended memory then insert states)

    (if SP points to contented memory then insert cycles)

    (if SP points to contented memory then insert cycles)

    Fikee Fikee April 2005 Development
  • 16K games.Hi all, Cauldwell's stuff aside, are there any good 16K games that you'd recommend? Regards, Shaun.

    ... ' games is that they are in fact 9.25K games, since ... matters worse the memory that is available is in contended memory (shared with the ... 'd probably want the loader in the screen area until the ...
    monty.mole monty.mole November 2005 Games
  • 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…

    ... my short list of fixes in POKE form (I'll leave ... else to provide a "type-in" hack).

    Fantasy ... by ROM differences rather than contended memory).

    ---

    I ... I knew about the difference in contended memory) but I can't quite ...
    Jmk Jmk February 2006 Games
  • Assistance with IM2 routineI subsequently got a working IM2 routine.

    ... or the stack is sitting in contended memory.

    Since you're ... you got the ROM paged in when you RST :) ?

    Alcoholics Anonymous Alcoholics Anonymous March 2006 Development
  • Bored...It works! Yep, here I am. I think I'll try going forward now, ready, set, go!

    ... meant to go one day in the future, but I seem ... temporal stabilisation materialisation vector codecs in contended memory! What an idiot...

    in time, to edit this post ... a minute or so in your time since I first ...
    ewgf ewgf May 2006 Chit chat
  • Bored...It works! Yep, here I am. I think I'll try going forward now, ready, set, go!

    ... meant to go one day in the future, but I seem ... temporal stabilisation materialisation vector codecs in contended memory! What an idiot...

    in time, to edit this post ... a minute or so in your time since I first ...
    dm_boozefreek dm_boozefreek May 2006 Chit chat
  • Bored...It works! Yep, here I am. I think I'll try going forward now, ready, set, go!

    ... meant to go one day in the future, but I seem ... temporal stabilisation materialisation vector codecs in contended memory! What an idiot...

    in time, to edit this post ... a minute or so in your time since I first ...
    GOC GOC May 2006 Chit chat
  • Where to start?Hi all, I wanna start coding something for the speccy. I have good experience at C/C++ and some other languages. I have coded asm on pc too, and ma…

    ... of registers to play with :-) In my defence, I was only ... I was probably running it in contended memory either, but most of the ...
    Winston Winston March 2007 Development
  • SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …

    [URL="http://homepage.ntlworld.com/mark.woodmass/amaurote.csw"]This[/URL] loader works well in contended memory under emulation. I've not tried it on real hardware.
    Woody Woody April 2007 Sinclair Miscellaneous
  • SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …

    ... "]This[/URL] loader works well in contended memory under emulation. I've not ... /> Amazingly that loader works in 16k mode - in which i've never ...
    alexsut alexsut April 2007 Sinclair Miscellaneous
  • Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…

    ... rubber key spectrum when running in lower 16K RAM?[/quote]
    in contended memory than ZX 128k or +2 ... of contended memory? Let's say how much we can count in 16 ...
    omega omega May 2007 Development
  • Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…

    ... memory, each model only gets one contended memory fetch during each eight cycle contended ... has terminated. So, when running in contended memory, the 48K/128K ULAs still ... see a contended memory address sitting on the address ...
    Woody Woody May 2007 Development
  • DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…

    ... badly behaved on original Spectrums - in common with a lot of ... puts an interrupt vector table in contended memory, which has unpredictable results on ... Spectrum clones don't have memory contention, so the programmers weren ...
    gasman gasman March 2008 Hardware
<1234567…34>

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in 401.9K 810.5K
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