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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…
... bit with memory contention and floating bus stuff in ZXDS and there ... seem to appear on the floating bus.
To be ... ?). However, as far as the floating bus is concerned, the very same ... .html"]tech doc[/URL] about floating bus.
Ramsoft's [URL=" ... -
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 ... -
Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…
... /> questions are:
1) is floating bus present on all of 128 ... -
Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
Before I start hacking Fuse's source...
Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus3_hardware.html#inFFport"]floating bus modification[/URL]?
-Stephen -
Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…
... (and probably +3) do have floating bus port. But it is not ... that +2A does not have floating bus port, but it's incorrect ... -
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…
... /> along with contended and uncontended floating bus reads.
Full details ... />
I've tested with Cobra, Sidewize, Aquaplane, Arkanoid....
JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …
... )
- Floating bus emulation (Arkanoid, Sidewize)
- Speaker and MIC emulation (Cobra's ...A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …
... 48K display timings
Floating bus and contention emulation model ( ... with digital TVs)
Expansion bus connector
< ... games including sidewise, arkanoid, cobra, etc. They all seem ... load
Implement a floating point co-processor usable ...Port $28FF. Why 28?Testing floating bus behaviour for ZXUno, I've found that both Cobra and Arkanoid use this specific 16-bit port: $28FF. What is so special about putt…
Testing floating bus behaviour for ZXUno, I've found that both Cobra and Arkanoid use this specific 16-bit port: $28FF. What is so special about putting the value $28 in A15-A8 during a read to $FF?
Thank you very much in advance! :)Emulation accuracy and how it affects softwareHi folks. I was thinking of bodging together a rudimentary Spectrum emulator myself, not as a competitor to the other emulators, but as an integrate…
IIRC Cobra and Arkanoid will fail due to lack of floating bus.
Several more will come to mind again given time...Games not working on the plus 2a/plus3Can anyone please tell me the name of any games that would not work with the plus 2a/plus 3 even in 48k mode? Games that were simply not compatable …
Cobra and Arkanoid spring to mind due to the floating bus issue.
D.Games not working on the plus 2a/plus3Can anyone please tell me the name of any games that would not work with the plus 2a/plus 3 even in 48k mode? Games that were simply not compatable …
There was a version of Cobra on a Plus 3 compilation disk: The Magnificent Seven, which must use some alternative to the floating bus.
DerekGames not working on the plus 2a/plus3Can anyone please tell me the name of any games that would not work with the plus 2a/plus 3 even in 48k mode? Games that were simply not compatable …
Just checked. The version of Cobra released by the Hit Squad doesn't use floating bus.Shoot-em-up gameHi everyone, For just over a month I have been working on a shoot-em-up game along the lines of Sidewize / Zynaps, ie. right to left scroller. It is…
... 'd, but I use the floating bus to do it. I guess ... just learnt recently that the floating bus can't be exploited on ... chose not to use one. Cobra redraws the entire background then ...Suggestions for games to test emulators?I'm going to be doing a comparision of a few different emulators, and was wondering if anyone had good suggestions of games to use as a 'benchmark' t…
... a good test. For the floating bus, try either [url="http://www ... .worldofspectrum.org/infoseek.cgi?regexp=^Cobra$&pub=^Ocean+Software+Ltd ...Speccy + issues?There was a topic somewhere regarding the different issues of the Spectrum keyboard and how it had some subtle effects on programs. Just wondering …
... Renegade 48k, Short Circuit and Cobra to run on my rubber ... floating bus in the +2a doing that - at least one of those (cobra ...128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…
... tried to get Arkanoid or Cobra working on your +3 - they ... but two.
The floating bus was an effect that meant ...Spectrum Game CompatibilityHi, At the moment I have a spectrum 48k. I am planning to get a 128k +2, but I have a problem. Will my 48k games work on 128k +2? Because some of the…
... in the frame timings. Both Cobra and Arkanoid run fine on ... due to the lack of floating bus.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…
... /+3 mode).
For floating bus, Cobra is a moderately easy example ...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…
Floating bus (vague apologies for the short reply, but have to go to work). Cobra doesn't run at all on a +2A/+3, independent of the control method.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…
[QUOTE=Philip Kendall;215801]Floating bus (vague apologies for the short ... have to go to work). Cobra doesn't run at all ... at this subforum talking about floating bus. If I had more hardware ... knowledges... :P
About Cobra, I'm playing it on ...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…
... 't matter too much... the floating bus is a slightly strange side ... by some games (notably Arkanoid, Cobra and Sidewize) to display their ...Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... .org/infoseekid.cgi?id=0000996]Cobra[/url], [url=http://www.worldofspectrum ... .cgi?id=0004494]Sidewize[/url]: floating bus
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After that ...Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... .org/infoseekid.cgi?id=0000996]Cobra[/url], [url=http://www.worldofspectrum ... .cgi?id=0004494]Sidewize[/url]: floating bus
[/list]
After that ...Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…
... test, so they are not COBRA-COMPLETE.[/QUOTE]
If ... grey" models do implement the floating bus behaviour, and the only 128K ...Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…
... grey" models do implement the floating bus behaviour, and the only 128K ... whether my "toastrack" can run Cobra... but I'm afraid it ... if it's actually a floating bus issue or other pesky incompatibility ...speccy hardware differences?yup, ive escaped from chit chat for a second ive been reading the last issue of retro gamer and theres an article on the commodes sid chip it was s…
... is the "floating bus", which is what causes Arkanoid, Cobra and Sidewize to ...zxs v0.2 releasedI have released v0.2 of zxs if anyone is interested, judging by the response to the first release, I'd say not, but I'm gonna do it anyway!. It has h…
... the floating bus to prevent a number of games from breaking (Cobra is ...zxs v0.2 releasedI have released v0.2 of zxs if anyone is interested, judging by the response to the first release, I'd say not, but I'm gonna do it anyway!. It has h…
... the floating bus to prevent a number of games from breaking (Cobra is ... -up resistors on the data bus causes it to float high ...same game diffrent versionwhich games have diffrent versions of the same game
Cobra had two versions, and it ... , then his gun, them the cobra logo etc). My friends copy ... -released when Amstrad broke the floating bus.....
