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The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... their keyboard profile
- Fixed memory contention for +2A/+3 models (Overscan ... 'll probably leave precise contended memory emulation as optional for 1 ... -
"Add Watch" Debug for EmulatorsHi, I am working on completing a JSW-style game that I started in 1991. Although programming using TASM and Spectaculator is far easier than on th…
... don't think it emulates memory contention as it's a clone ... -
The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... />
What's new:
- Memory contention emulation is now optional. It ... -220 MHz.
- Even when contention is enabled, it's not ... to 145/175 MHz. Without contention emulation it's left to ... -
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…
... 're trying to test. For memory contention and display timings, Shock Megademo ... -
Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…
... out to be a significant memory contention timing issue....
Anyway ... before - all due to this contention issue.
Full details ... -
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…
... 10th pixels output
14346 Memory contention starts, 11th and 12th pixels ... -states 14338-14343 experience memory contention.
The memory contention timing is as ... -state is contended by the memory contention!!)
The design on ... -
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…
... and 128k modes when the memory contention is implemented according to ... is not affected by contention, neither memory nor IO, so the ... If the IO contention was the same as memory, you'd ... -state is contended by the memory contention!!)[/QUOTE]
Well, ... -
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…
... for instance says that memory contention begins at 14335, and ... be the same as memory contention and testers were waiting ... [QUOTE]"[I]IO contention is different from memory contention[/I] ......" Now this ... is not affected by contention, neither memory nor IO, so ... -
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…
... from "Fuse"'s model (specifically, memory contention at 14335). -
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…
... from "Fuse"'s model (specifically, memory contention at 14335).[/QUOTE]
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…
I've just updated [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url] to include a dedicated memory contention test program. What results do we get with that on various things?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…
... an IO instruction that experience contention, and when that is.[/QUOTE ... after interrupt do not experience memory contention?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…
... after interrupt do not experience memory contention?[/QUOTE]
Accepting the ... yes, I'm saying that Memory contention does not start until 14337 ... 14336, then it will experience contention - if it is being fetched ...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…
... from "Fuse"'s model (specifically, memory contention at 14335).[/QUOTE]
Philip, I get IO and Memory contention Passes on the Harlequin, on ...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 for tests to measure memory contention?
ie where do ... they assume the contention applies? T3, when the actual ...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 for tests to measure memory contention?[/QUOTE]
contention and Memory contention differ. So the ... contended according to the memory contention pattern and the other ... slightly different test for memory contention in this case anyway ...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…
... out, the IO contention and Memory contention differ. So the ... contended according to the memory contention pattern and the other ... ~MREQ goes low the memory contention pattern is selected, before ... applies [I]never [/I]the memory contention pattern.
...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…
... ~MREQ goes low the memory contention pattern is selected, before then ... otherwise it is the IO contention pattern.
MREQ ... to do with choosing which contention pattern (because the ULA ... assumption there is just one contention pattern, not two.
...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…
... br /> So the ULA applies contention when it spots an address ... .
Philips fusetest checks IO contention this way.
... assumption there is just one contention pattern, not two.[/QUOTE ... is the same as the memory contention, but the uncontended cycles ...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…
... yes, I'm saying that Memory contention does not start until 14337 ... 14336, then it will experience contention - if it is being fetched ... wont.[/QUOTE]
OK, contention.tap (in the latest fusetest ...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…
... now finally understand how your contention scheme works (and gives identical ... I remember correctly, Harlequin applies memory contention at 14338, FAQ says it ...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…
... understand it... the wiki assumes contention is applied before T1, ... but Chris is applying contention before T3.[/QUOTE]
... posts above Chris said the memory contention is applied during T1 ( ... and IO contention at T2). Definitely not ...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…
... way, with demos, IO and memory contention test code, etc. Good enough ...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…
... floating bus timing and how contention affects instructions.
2. ... software without involving IO or memory contention at all - so we ... contention timing is to stop the CPU accessing the memory ... talking about which cycles the contention is [B]actually[/B] ...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…
... contention is the same as memory contention. So, has the "[I]contention ... byte only. Also, the memory contention timing must span the ... time. This means that memory contention must begin at 14338 ... continues for 6 cycles, Memory contention starts at 14338 and ...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…
... is just one type of contention, which starts at 14336 and ... it tries to apply the memory contention at T1 two states later ... is that the memory contention in Harlequin does not work ... happens if you change the memory contention to be the same as ...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 tries to apply the memory contention at T1 two states later ... is that the memory contention in Harlequin does not work ... I was thinking about 2 contention patterns.
[QUOTE ... happens if you change the memory contention to be the same as ...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…
... a T-state level, and memory contention does not appear to be ... have a pointless crossover between contention models.
The ... the others not, and the memory contention being the same as the ... in my head that the memory contention had to be the way ...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…
... ULA fetches and memory contention is concerned. And IO contention very likely as ...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…
... ULA fetches and memory contention is concerned. And IO contention very likely as ... you realised about the mem contention of T1 is exactly the ...
