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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…
... contended IO read of the floating bus (because that T-state is ... -
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…
... /> 1. The wiki documents the floating bus timing and how contention affects ... -
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…
... difference.
However, if the floating bus timings on the Wiki are ... are correct by watching the floating bus, which means the IO 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…
... research done before adding contention, floating bus and accurate screen sampling to ... -
Speccy emulation with R4 - DSpec, ZXDS & SpeccyDS...Finally got an R4 card up & running, and I've installed DSpec, ZXDS & SpeccyDS onto it, but I've a couple of questions I'm hoping somebody can help w…
... . The features include contention and floating bus emulation, accurate screen sampling, better ... -
Speccy emulation with R4 - DSpec, ZXDS & SpeccyDS...Finally got an R4 card up & running, and I've installed DSpec, ZXDS & SpeccyDS onto it, but I've a couple of questions I'm hoping somebody can help w…
... . The features include contention and floating bus emulation, accurate screen sampling, better ... -
Speccy emulation with R4 - DSpec, ZXDS & SpeccyDS...Finally got an R4 card up & running, and I've installed DSpec, ZXDS & SpeccyDS onto it, but I've a couple of questions I'm hoping somebody can help w…
... . The features include contention and floating bus emulation, accurate screen sampling, better ... -
Kempston on real machines and on emulatorsRecently I've tested several 48K games on my Spectrum +2A with Kempston interface. The computer resets when I start the game. I've tried with two dif…
... 48K and 128K. Removing the floating bus broke what? 3 games? Not ... -
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…
... instead of 4.
- Improved floating bus emulation, now passes floatspy test ... -
Arkanoid and +2A, problems??Is there any kind of incompatibility with Arkanoid in a +2A? I load the game but when it's time to play, the stick doesn't move and nothing happens, …
... Arkanoid requires the standard spectrum "floating bus" behaviour that the +2A doesn ... />
(In some cases, the floating bus check code can be replaced ... -
Arkanoid and +2A, problems??Is there any kind of incompatibility with Arkanoid in a +2A? I load the game but when it's time to play, the stick doesn't move and nothing happens, …
... +3 also lacks the original "floating bus" behaviour found on the original ... -
Arkanoid and +2A, problems??Is there any kind of incompatibility with Arkanoid in a +2A? I load the game but when it's time to play, the stick doesn't move and nothing happens, …
... +3 also lacks the original "floating bus" behaviour found on the original ... -
Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …
... features i can add:
-floating bus stabilisation ( return interrupt vector #FF ... to data-bus )
-fuller joystick emulation ( on ... -
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 …
... /> Contended IN... failed (0xfd)
Floating bus... skipped (B=0x01)
Contended ... -
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 …
... /> Contended IN failed: (0x02)
Floating Bus failed: (0xff)
Contended memory ... -
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 …
... /> Contended IN... failed (0xff)
Floating bus... skipped (B=0x01)
Contended ... /> Contended IN... failed (0x02)
Floating bus... failed (0xff)
Contended memory ... -
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 …
...
Contended IN... passed
Floating bus... passed
Contended memory... passed ... -
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 …
... /> Contended IN... failed (0x03)
Floating bus... failed (0xff)
Contended memory ... -
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 …
...
Contended IN... passed
Floating bus... skipped (B=0x01)
Contended ... -
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…
... /> contened in...failed (0x02)
floating bus....failed(0x02)
High port ... /> contened in...failed (0xfd)
floating bus....skipped (b=0x01)
contended ...
contened in...passed
floating bus....skipped (b=0x01)
contended ... -
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…
... first grey gave 0xfd)]
floating bus...skipped (b=0x01)
contened ... -
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…
... and exact info about the floating bus behavior and timing. An explanation ... , you wouldn't see the floating bus behaviour that you find on ... -
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…
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…
+2A, are they all this incompatible?My +2A does not seem to be faulty but the number of games that don't run on it are silly. Scooby Doo(Elite), Crazy Cars , Turbo Outrun, Vindicator(im…
... issue with some games (no floating bus) and sometimes a ROM issue ...Fuse 0.9.0 releasedVersion 0.9.0 of [url=http://fuse-emulator.sourceforge.net/]Fuse[/url], the Free Unix Spectrum Emulator[/url] has just been released. Highlights of t…
... /> [*]Much improved contended memory and floating bus emulation.
[*]Improved display timings ...Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …
Do your port reads after a HALT to avoid reading the [URL="http://scratchpad.wikia.com/wiki/Floating_bus"]floating bus[/URL] with no Kempston attached.Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …
[QUOTE=Woody;239126]Do your port reads after a HALT to avoid reading the [URL="http://scratchpad.wikia.com/wiki/Floating_bus"]floating bus[/URL] with no Kempston attached.[/QUOTE]
Thanks Woody.Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …
... , sounds like you're seeing floating bus values there. Quoth the [url ... put anything on the data bus. Therefore, you'll read a ... mixture of 0xff (idle bus), and screen and ATTR data ...Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …
... /> It's not actually a floating bus if the ULA is pulling ... but then considered that a floating bus would produce "random 0 to ...
