World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.002s
<1…18192021222324…34>
  • CPU speed measure possible?Is it possible to measure the CPU speed and shows the result on a LED display? Micky

    ... direct from Xtal, the other ('contended') one from ULA. We don ...
    roko roko May 2010 Hardware
  • DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…

    ... something to do with avoiding contended port reads during INI instructions ...
    gasman gasman May 2010 Announcements
  • Who can fix my Flash programmer code?I have a problem with some code, it doesn't work and I don't have any idea what it's trying to do, or failing to do! The code in question is the fla…

    seems being the operative word...

    the tape routine is running in contended ram so breaks, but for some reason it worked in spin!

    also there are bugs in the flash erase code somewhere, back to the drawing board :)
    guesser guesser May 2010 Development
  • So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…

    ... ULA (both VRAM and non-contended RAM), and I'm afraid ... other way, if a non-contended RAM access is to be ...
    mcleod_ideafix mcleod_ideafix June 2010 Hardware
  • +2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…

    ... mode, with RAM bank 4 (contended memory) in 0x0000-0x3FFF, and ...
    velesoft velesoft June 2010 Hardware
  • "Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…

    ... previous models, since every 8 contended states there's only one ...
    Metalbrain Metalbrain June 2010 Sinclair Miscellaneous
  • Sprite MaskingI was looking at the sprites in some games, and noticed they have sprite followed by mask. Usually a row at a time (so the mask is sort of interleave…

    ... use the block load instructions (ldi, ldd, ldir or lddr) ... simple 8x8 pixel sprite. LDI will do the following for ... ld a, (hl) ; part of ldi
    ld (de), a ; ... part of ldi
    dec bc ; part of ... an effect of [b]ldi[/b] that in this ...
    ajmoss ajmoss June 2010 Development
  • Sprite MaskingI was looking at the sprites in some games, and noticed they have sprite followed by mask. Usually a row at a time (so the mask is sort of interleave…

    I quite agree that using LDI is faster than using the ...
    Gedlion Gedlion June 2010 Development
  • "Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…

    ... previous models, since every 8 contended states there's only one ...
    Philip Kendall Philip Kendall June 2010 Sinclair Miscellaneous
  • Sprite RotatingI was looking (actually at Everyone's a Wally), and noticed that all the graphics for the main characters are left facing, and two characters wide. …

    ... ), a
    inc e
    ldi
    ldi

    ld (de ... ), a
    inc e
    ldi
    ldi

    [/CODE]
    Fikee Fikee June 2010 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…

    ... note is that contended memory is not actually contended until the ULA ...
    mcleod_ideafix mcleod_ideafix June 2010 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 for ... residing in, or reading/writing, contended RAM.[/quote]

    You ...
    Philip Kendall Philip Kendall June 2010 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…

    ... PUSH, only the plain old LDI. Stack is used, but in ...
    Metalbrain Metalbrain June 2010 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…

    ... , using a sequence of [b]ldi[/b], assuming there would be ...
    ajmoss ajmoss June 2010 Development
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... ROM). The problem is that contended memory access isn't just ... square-wave tone channels) in contended memory. It sounds pretty funny ...
    ccowley ccowley June 2010 Announcements
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... ROM). The problem is that contended memory access isn't just ...
    Mister Beep Mister Beep June 2010 Announcements
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... square-wave tone channels) in contended memory. It sounds pretty funny ...
    Mister Beep Mister Beep June 2010 Announcements
  • A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…

    ... table will reside in non-contended memory, somewhere in the address ...
    ajmoss ajmoss July 2010 Development
  • Whole New Horizons! The only ZX-Spectrum 48k intro competition with a theme![B][I]MacBuster^MagicSoft/Extreme[/I][/B] brings you an amazing action!!! "Imagine yourself it is January or 1982 again and... No! I say no - you're…

    ... because the whole memory is contended.
    Shiru Shiru July 2010 Announcements
  • multicolor on 48Kmany people tried multicolor 8x1 on 48K model and ended with maximum width about 18 chars. yesterday i tried [b]8x2[/b] on 48K and achieve 24 char wi…

    ... , you really get hit by contended memory.

    (The one ...
    gasman gasman July 2010 Development
  • Silly question on Russian clonesIv a silly question to ask... Iv been looking at web links about Russian ZX clones with envious eyes, wondering if I might spend money on something…

    ... ULA timings except for the contended memory -> [url]http://translate ...
    Shockwav3 Shockwav3 July 2010 Hardware
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... games are written for the contended RAM of the +2A and ...
    chev chev July 2010 Hardware
  • Embedding external code in Z88DK projects (Beepola related)Hi all, I've been doing a few things in Z88DK, but I was wondering how I could link binary data compiled separately into my projects. Specifically I…

    ... your song isn't in contended ram though. 32768+ is okay ...
    FrankT FrankT July 2010 Development
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... . The Russian machines have no contended RAM to worry about. The ... both video RAM pages are contended. The standard Pentagon doesn't ...
    chev chev August 2010 Hardware
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... the pages that are not contended on any of the 128s ...
    chev chev August 2010 Hardware
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... />
    Port 0x7FFD is itself contended, and horribly so. I only ...
    ajmoss ajmoss August 2010 Hardware
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... ;464692]Port 0x7FFD is itself contended, and horribly so. I only ...
    chev chev August 2010 Hardware
  • Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…

    ... to copy (HL) to (DE). LDI automatically increases HL & DE ... , and the repeat part of LDI[B]R[/B] makes the ...
    RetroTechie RetroTechie August 2010 Sinclair Basic
  • Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …

    ... better than penalty for two LDI. that is where you get ...
    Fikee Fikee August 2010 Development
<1…18192021222324…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
ldi 487 1.9K
contended 1.2K 2K

Related Threads

  • Games that crash because of contended memory.I find these are really annoying.<br /> <br /> You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so …
  • 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 - …
  • 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…
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ:<br /> <br /> instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b]<br /> and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b]<br /> …
  • Quick question regarding contended memoryIf I've read the documentation correctly, the following applies:<br /> <br /> 128k/+3<br /> "Memory banks 1,3,5 and 7 are contended"<br /> <br /> +2A…
  • +2 grey Contended RAMhi all,<br /> <br /> i have some quenstions about,<br /> <br /> contended RAM are banks 1,3,5,7<br /> <br /> banks are the pairs of IC's (4164), so 1…
  • Contended Memory woes...Hello All,<br /> <br /> An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :)<br /> <br /> I've noticed that my…
  • LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
  • 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…

Related Searches

  • led storm contended
  • crash contended
  • contended author einar
  • contended einar
  • contended memory
  • halt in contended memory
  • halt contended
  • contended memory zxds
  • contended
  • contended speed
  • zx evo contended
  • contended instructions
  • tc2048 contended
  • tc2048 contended io
  • skate crazy contended
  • contended port
  • zx 3 contended
  • pentagon contended 16k
  • rmartins ldi buffer
  • ldi contention

Copyright © 2024 World of Spectrum