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<1…16171819202122…34>
  • Emulator Comparison ChartHi. In a similar vein to [URL=http://www.ppest.org/zx/zxse.php]Piters[/URL] comparison of various ZX emulators, I've been looking at adding some deta…

    ... trying to test. For memory contention and display timings, Shock Megademo ... (try in all of 48K, 128K and +2A/+3 mode).
    Philip Kendall Philip Kendall June 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…

    ... usual documented T-states (contention start at 14335) differ ... both 48k and 128k modes when the memory contention is implemented ... nor IO, so the contention is fortunately irrelevant to its ... is contended by the memory contention!!)[/QUOTE]

    Well, ...
    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…

    ... /> It would crash if the contention is not right, at least ... align correctly on the first contention and the rest is then ... had the same info for 128k as well :)

    Thanks ...
    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…

    ... pointed out, the IO contention and Memory contention differ. So the ... according to the memory contention pattern and the other ... does the 128k behavior fit in? I mean, no contention applied ... slightly different test for memory contention in this case anyway, ...
    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…

    ... off the mark for the 128K models too. Obviously a hardware ... , with demos, IO and memory contention test code, etc. Good enough ...
    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…

    ... on 48k, but also on 128k as well as most other ... interest for memory and IO contention testing. I have run it ...
    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…

    ... my hands on a genuine 128k Spectrum, so I didn't ... to mean that some different contention scheme was applied to the ... paging doesn't disable the contention of the high range, port ...
    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…

    ... figure it out from the contention pattern of each instruction, ... br />
    On 48k and 128k, the only instruction T states ... see xyz).

    The contention happens according to the PC ... extra inserted T states the contention happens according to the value ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... ;221081]Timing is issue, on 128k is VRAM not contended before ... no contention outside of paper areas. It works like the 48K/128K ... machines with 16x8 cycle sequences of contention, but with ...
    Woody Woody October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... no contention outside of paper areas. It works like the 48K/128K ... machines with 16x8 cycle sequences of contention, but with ... . It means that outside paper 128k and +3 is equal, inside ...
    omega omega October 2007 Hardware
  • Compatible SpectrumsFollowing some recent coding exploits I've been thinking about compatibility of various models of ZX Spectrum. Yes, it's a common question on the for…

    ... all... due to the memory contention issues. The +2a/+3 had ... , 3, 5, 7) to the 128k/+2 (I think 4, 5 ... also the issue of different contention timings to the "original" models ... can't change the hardware contention, surely.


    Of ...
    ingo ingo October 2007 Hardware
  • SAM gets ethernetWhilst off topic - head over to [url]www.samcoupe.com[/url]. Colins got his ethernet board for the SAM available to buy and some interesting news ab…

    ... have a >=128K flash ROM and >=128K static RAM (any ... things like RST#8 trap contention can't be sorted out ...
    Winston Winston October 2007 Hardware
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    ... ... failed (0x01)
    High port contention 1... passed
    High port ... it hangs on 'High port contention 2' but is otherwise the ... . In 48K mode 'High port contention 2' passes (and is otherwise ... ).

    zx128k: I believe 128K mode (Tape Loader) is the ...
    gasman gasman November 2007 Hardware
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    ... run Fusetest on my real 128k and it's produced some ...
    think it's a 128k (commented out jr z, _mplus3 ... )
    High port contention: passed
    High port contention 2: failed (0x02 ...
    Jon Needle Jon Needle November 2007 Hardware
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    ... failed (0x01)
    High port contention 1... passed
    High port ... contention 2... failed (0xff)

    Machine type: 128K

    BIT n,( ... (0x02)
    High port contention 1... passed
    High port ...
    Mr. Anonymous Mr. Anonymous November 2007 Hardware
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    On a 128K+ in 128K mode with the bypass poke... ... : 0x8000 + 0x94fc
    Machine type: 128K

    Bit n,(IX ... memory... passed
    High port contention 1... passed
    High port ...
    gasman gasman November 2007 Hardware
  • Quick testCould I ask anyone with a real 128K or +2 to run the latest [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]Fuse test suite[/url] on it and …

    ... 0x8000 + 0x94fc
    Machine type: 128K

    BIT n,(IX ... ... failed (0x02)
    High port contention 1... passed
    High port ...
    Mr. Anonymous Mr. Anonymous November 2007 Hardware
  • Quick test (2)Could I ask any 128 / +2 / +2A / +3 owners to test the new version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.tap]fusetest[/url] on thei…

    ... Type I (apparently...) 128+. In 128K mode:

    Frame length ... : 0x8000 + 0x94fc
    Machine type: 128K
    (everything passes)

    contention 2' test. I assume this ...
    gasman gasman November 2007 Hardware
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... the bytes without any memory contention would be nice, too.[/QUOTE ... find on the 48K and 128K (but not on the +3 ...
    zub zub November 2007 Emulators
  • New tape releases - 128K only?As Jon's new Egg-Head game is 128K only, and splATTR has also evolved into a 128K only game - both due to memory constraints - I was wondering if the…

    ... -Cat;230158]Just get ANY 128k ... they are all good enough ... of the old +2 (grey) /128k - no snow effect in many ... be the case, but the contention on the RAM pages will ...
    icabod icabod December 2007 Games
  • Full throttle CPUHello, I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used? If so, what's t…

    ... just as quick (modulo memory contention) as any other write on ... case, OUTing to say the 128K memory port could cause 32Kb ...
    Philip Kendall Philip Kendall January 2008 Sinclair Miscellaneous
  • Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…

    ... Kendall).
    [*] Reading from the 128K's memory control port causes ... (but probably not perfect) TS2068 contention (Philip Kendall).
    [*] Various other ...
    Fred Fred November 2008 Emulators
  • Hi-colour gamesDoes anyone remember some of the games that used something called Ho-colour? Like the options page on the Agent X games, and a few others. If memory …

    ... know, pentagon has no memory contention (well, I might be totally ... like this on a regular 128k:

    [img]http://www ... tryptomine dream on a regular 128k?

    and why there ...
    Arda Arda January 2009 Games
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... program is loaded onto a 128K Spectrum it will be in ... . The memory contention timings are also different between different 128K models, and ...
    joefish joefish March 2009 Development
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... . The memory contention timings are also different between different 128K models, and ... 3 types of ULA (48K/128K/+3), frame length plus some ... of splitting 128K/+3[1] lets you know your contention pattern[2 ...
    Philip Kendall Philip Kendall March 2009 Development
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... running on both 48K, and 128K / +2 in 48K mode. It ... crashes outright in 128K mode, but I'm not ... /> Interestingly, the way that the contention works actually serves to regulate ... line. It's having less contention on the +2A that mucks ...
    joefish joefish March 2009 Development
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... method only works on a 128K, I presume? I guess I ... little less video memory contention than previous 128K machines, so it may ... use this method on any 128K machine to get a bit ... happy for it to be 128K only.

    I can ...
    joefish joefish May 2009 New game ideas
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... little less video memory contention than previous 128K machines, so it may ... have less contention on the +2A/+3 than the 128K/+2? (Assuming ... more contention on the +2A/+3 for those instructions than the 128K ...
    Philip Kendall Philip Kendall May 2009 New game ideas
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... /+3 actually has more contention than the 128K/+2, but the ULA ... is cleverer and doesn't apply contention ... at least as much contention as the 128K/+2, if not more ...
    Philip Kendall Philip Kendall May 2009 New game ideas
  • Brand new River Raid remake?one of my friend is trying to make a riverraid remake on flash just to have fun, I checked zx spectrum port of river raid. it is bad, really bad, jer…

    ... it applies less contention than the 48K or 128K ULAs."[/quote]
    joefish joefish May 2009 New game ideas
<1…16171819202122…34>

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