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  • 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…

    ... that there's no real contended memory information in there, so ...
    Philip Kendall Philip Kendall 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…

    ... FAQ states that T2 is contended, and we know that at ... sure the T3 is never contended and the ULA can deal ...
    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…

    ... that there's no real contended memory information in there...[/QUOTE ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • Does anyone remember ftp.ijs.si?This is a blast from the past! I was going through some old files the other day and found this file:- [url]http://reptonix.awardspace.co.uk/sinclair…

    ... by real z80s as a NOP but intercepted by emulators to ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Sinclair Miscellaneous
  • 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…

    ... case. Is the first cycle contended according to the memory contention ... one can't be certainly contended by IO contention, as ... #FE gets the second cycle contended due IO contention and the ... #7FFF gets all cycles contended due memory contention.
    Now ...
    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…

    ... case. Is the first cycle contended according to the memory contention ... one can't be certainly contended by IO contention, as IOREQ ... 2 above, but are additionally contended:
    - If A0 is low ... high, all T-states are contended

    But only the ...
    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…

    ... IO) instructions which are contended at points when there is ... the bus, etc.) are contended according to the IO ... high, all T-states are contended[/QUOTE]

    ... last T states were contended, we would not be ... the first and last contended state, but due to ...
    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…

    ... (non-IO) instructions which are contended at points when there is ... on the bus, etc.) are contended according to the IO pattern ... high, all T-states are contended
    [/QUOTE]
    How do ... true, however ALL states are contended. We are able to tell ...
    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…

    ... whether the entire instruction was contended (contended according to certain criteria, ... much, nor how many contended T states there are. ... out the first and last contended T states, by running ... is multiple points which are contended during the instruction (per ...
    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…

    ... the entire instruction was contended (contended according to certain criteria, ... multiple points which are contended during the instruction (per ... instruction appear to be contended when accessing a port ... /> The first will be contended, the second not - so ...
    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…

    ... [QUOTE]... The first will be contended, the second not - so you ... to measure the number of contended cycles ...[/QUOTE]

    ... many cycles is the instruction contended, I talk about which ... are two uncontended cycles, then contended one again. Which is ...
    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…

    ... fusetest.zip) simply executes a NOP at 0x7fff at a range ...
    Philip Kendall Philip Kendall 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…

    ... refresh it's seeing the contended address range [B]but[/B ...
    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…

    ... fusetest.zip) simply executes a NOP at 0x7fff at a range ...
    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…

    ... LDIR, which has five single contended "steps" at the end?
    Philip Kendall Philip Kendall 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…

    ... LDIR, which has five single contended "steps" at the end?[/QUOTE ...
    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…

    ... if that state was not contended. Or do I miss something ...
    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…

    Well, if I am about to achieve accurate screen sampling, I really have to ask the questions like at what cycles are the screen data sampled and how comes the FAQ suggests that some of them are not in fact contended, don't I?
    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…

    ... them are not in fact contended, don't I?[/QUOTE]
    contended cycles occur.

    The ...
    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…

    ... as I suggest, particularly if contended-floatbus reads are to return ... you attempt to sample the contended cycles via software - because your ...
    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…

    ... memory, is [b]not[/b] contended.
    2) There is just ...
    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…

    ... memory, is [B]not[/B] contended.
    2) There is just ...
    Woody Woody 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…

    ... memory read/write is not contended and I think it is ...
    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…

    ... memory, is [b]not[/b] contended.
    2) There is just ... why do we have 6 contended cycles when 4 will do ...
    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…

    ... memory read/write is not contended and I think it is ... to why 6 cycles are contended when, if the IO pattern ... of the fetch are not contended, I've embarrassingly missed this ...
    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…

    ... 're revelation about T1 being contended and the others not, and ... T state that was being contended.

    Are we positive ... about T1 only being contended for memory access???

    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…

    ... . As T2-T4 are not contended and both T2 and T3 ... make sure the T1 is contended unless it ends at least ... that T1 is in fact contended unless it ends 3 cycles ... last attribute fetch is not contended. This way, all M1, M2 ...
    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…

    ... /> ulatest 2/3 - shows 7 contended memory cycles.

    No ...
    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…

    ... of IN #xxFE not being contended still bit troubles me.
    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…

    ... of a memory access is contended is it? If only I ...
    csmith csmith September 2007 Emulators
<1…12131415161718…34>

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