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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…
... past, Spectrum +2A (and probably +3) do have floating bus port. But it ... running on my old Spectrum +2A:
https://www.youtube ... the net says that +2A does not have floating bus port, but it ... -
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 -
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…
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 ...Programs with strict timing requirements.Hi, all, I am a bit stuck about the timings of my SpecIde emulator. (https://github.com/MartianGirl/SpecIde) The thing is, I think that the tim…
... SongInLines4 doesn't, either in +2A or in +2.
2A floating bus thread, shock, overscan, mda, hercules ... if they are for the +2A)
Thank you ...Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... .org/forums/discussion/51886/spectrum-2a-floating-bus-port#latest]this[/url]? I ...Problems with games on +2AHi! I have a +2A now and have problems running some games on it. I tought the resistor fix (to give it some kind of "floating bus" as the original 4…
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I have a +2A now and have problems running ... give it some kind of "floating bus" as the original 48k ... 't work properly on a +2A (even modified as mine) ??? ... the games on emulators (in +2A mode !) and they work ... try them on their +2A's then I would be ...New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... ,
having added the +2A/+3 emulation recently, I want ... the screen bytes. Obviously the floating bus can't be used to ... would really appreciate if some +2A/+3 owner would run the ...Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... -help-from-people-with-a-2a-3"]here[/url] to get ... the mystery of the elusive floating bus on these machines, and no ... if I can fetch a bus value from it. Now, I ... anyway), and skip ULA/bus polling on a +2A/3, but if ...RUSSIAN SOFTWARE and real ZXRussian ZX games is writed on russian ZX clones and support hardware feature TURBO OFF ( for ZX clone ZS SCORPION ). Russian ZX clone ZS SCORPION use…
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On ZX Spectrum +2A and +3 is port #7FFD ... and CPU read data from floating bus ( value #FF ). Software ... SCORPION is on ZX+2A/+3 models ifnored (without ... all other ZX models (+2A/+3 and russian ZX ... all ZX128 models(ZX128/+2/+2A/+3/russian clones):
...Emulating the 128KeIt occurs to me that I wasn't frequenting WoSf when I created the 128Ke standard, which means some people haven't heard of it. Here it is: [url]http…
... case it should save a +2A snapshot).
< ... hardware mod to the +2A. You emulated ULAplus ... ROM. All the +2A software that uses all ... it support that the standard +2A doesn't?
floating bus. 128 software that requires ...New stable version ZEsarUX-4.2Hi everyone! I have uploaded a new stable version of ZEsarUX emulator, version 4.2. You can download it from: https://sourceforge.net/projec…
... and 3ffd and crashes running +2A/+3 ROMS with real video ... symbol (*) is shown
Improved floating bus value
Updated Z88 OZ ...New emulator - Spectramine v.1.0b releasedI post the first release of my Spectramine emulator, with minimal functionality, for public testing of emulation quality and compatibility with games…
SpecIde updated!Hi, all! In these past months I've been brushing up a bit my emulator, SpecIde, a.k.a. the least efficient emulator in the world. At this momen…
... . (Issue 2/3, contended memory, floating bus, snow effect...)
- Pixel-perfect ... memory, floating bus, snow effect...)
- Pixel-perfect emulation of Spectrum +2A/+3 ... . (This is new; I've implemented the contended memory, floating bus ...ZXDS 2.0.0Hello, after few months of intense work, I am finally ready to announce [url="http://zxds.raxoft.cz"]new ZXDS release[/url] for Nintendo 3DS. The …
... instead of WEP, or floating bus emulation for +2A/+3 machines.
Inkspector 2.0 (final) releasedI’ve just released Inkspector 2.0 final (there was a preview version released before Xmas). It’s a new emulator for Windows with all-new code (non ca…
... funky Spectrum behaviours including the +2A/+3 floating bus) it has a built ...Detecting +3 or +2AIs it possible to detect whether your BASIC program is running on a +2A/+3 or a proper 128?
... port. The +2A/+3 don't have a floating bus effect so you ...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 …
... not work with the plus 2a/plus 3 even in 48k ... to mind due to the floating bus issue.[/quote]
There are ...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…
... meant that the floating bus is not available in +2a/+3 modes, where ...SPIN & port #FFHow to solve a problem with port #FF on SPIN? This prevent me from creating correct RZX-file with Short Circuit, part 1.
What problem are you having?
Port $FF is an unattached port - it will reliably return $FF on a read in +2a/+3 hardware, and floating bus results for any prior models.
D.Games that won't work with the +2a/bIs there a list of all the games that don't work with the +2a/b? Like Fairlight for example. Ta :)
... also the different timings, non-floating bus etc.? Note: I am talking ... bigger EEPROM into his/her +2a, one that also contains the ... an external switch? Would a +2a work with a heatsink-type ...fzx32 on GP32 progressing nicelyJust to let you know that Rlyeh is working hard on his ZX Spectrum emulator fZX32 for the GP32 and should be released in the near future. Its based…
... , ZX 128, ZX +2, ZX +2A and ZX +3 spectrum models ... emulation (multicolor effects),
- Preliminary floating bus emulation,
- Virtual Keyboard suppoprt ...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 …
... keyed 48k and on the +2A, yet they ran fine a ... the absence of a floating bus in the +2a doing that - at least ... as it does on the +2a for the screen synch.
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…
... this one.
The +2a and +3 are the top ... +3 BASIC (and on a +2a) you need to prefix filenames ... games which take advantage of floating bus behaviour on the 48k/128k ... will not work on a +2a/+3.
D ...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…
... I've ever encountered the 'floating bus' bug. Everything I've tried ... a +3 mainboard and a +2a keyboard off ebay and put ...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…
... :
There's that damn floating bus again!
[/quote]< ... that the floating bus is not implemented in hardware on unmodded +2a/+3 ... emulators do not emulate the floating bus effect, I don't ... the above posts,I think floating bus code can pretty much ...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…
... the black one, thats the +2a isn't it? Is there ... one?[/QUOTE]
The +2a and +3 had severe incompatibility ... the ULA and removed the floating bus effect. Although this was a ...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…
... die completely on a +2A/+3 due to the lack of floating bus.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…
[QUOTE=Dunny]The +2a and +3 had severe incompatibility ... the ULA and removed the floating bus effect. Although this was a ... about the +2 (grey) and +2a (black), is there incompatibility issues ...
