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bug in spectaculator? Hi Jon, While testing the AMX mouse emulation in Spectaculator I noticed that the mouse buttons don't work. My program reads port $df to detect mo…
... only puts bits on the bus when you press a button ... of screen and attribute bytes (floating bus effect).
[quote]
3-buttoned affair ;)
The ... -
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.
Derek -
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 …
... with the plus 2a/plus 3 even in 48k mode?[/quote ... 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…
... 'd, but I use the floating bus to do it. I guess ... that the floating bus can't be exploited on +2, +3, so i ... -
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. -
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…
... +2, ZX +2A and ZX +3 spectrum models.
- Full working ... /> - Accurate border emulation,
- AY-3-8912 and beeper sound emulation ... emulation (multicolor effects),
- Preliminary floating bus emulation,
- Virtual Keyboard suppoprt ... -
How to detect 48k modeHow can you detect if a 128k machine is in 48k mode (from an emulation point of view, not via BASIC or machine code)? Checking the current rom? But …
... decoded and it returns the floating bus.
[quote]
2) When ... SPECTRUM command.
[quote]
3) What is PSG?!? I'm ... /> It's just the AY-3-8912A soundchip used in 128K ... -
Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... tapfile into SPIN
3. In SPIN, Select "Tools" -> ... /> The pokes simply bypass the "floating bus probe", and install the HALT ... for putting me onto the "floating bus" issue - I would never had ... -
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…
... .
The +2a and +3 are the top of the ... a complete disk operating system. 3" disks can be a twat ... to load from tape in +3 BASIC (and on a +2a ... games which take advantage of floating bus behaviour on the 48k/128k ... 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 ...
I went for the +3 because of its modability. I ... the casing. Bought a +3 mainboard and a +2a ... floppy drive and added a 3.5" PCXT floppy drive ... I would go for the +3 though, simply because of ... -
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…
... or Cobra working on your +3 - they won't work, to ... but two.
The floating bus was an effect that meant ... -
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 ... the floating bus is not implemented in hardware on unmodded +2a/+3 systems ... 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 +2a and +3 had severe incompatibility issues for ... 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 issues for ... the ULA and removed the floating bus effect. Although this was a ... -
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…
... , 128K and +2A/+3 mode).
For floating bus, Cobra is a ... -
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…
... screen
14347 Display byte 3 fetch, 13th and 14th pixels ... output
14348 Attribute byte 3 fetch, 15th and 16th pixels ... 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…
... Z80 perhaps samples the IRQ 3 states later after ULA pulls ... pulled it low. But not 3. Besides, if that was the ... contended IO read of the floating bus (because that T-state is ... -
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 ... at all on a +2A/+3, independent of the control method ... at this subforum talking about floating bus. If I had more hardware ... -
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 ... this "feature" for the +2A/+3, so games which relied 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…
... and 128K. Removing the floating bus broke what? 3 games? Not that serious ... -
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, …
... play the game on a +3, it would happen the same ... 's right, the +3 also lacks the original "floating bus" behaviour found on ... -
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, …
... 's right, the +3 also lacks the original "floating bus" behaviour found 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 …
... 0x8000 + 0x94fc
Machine type: +3
BIT n,(IX ... /> 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 …
... machines get detected as a +3 so I hacked the source ... /> 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 …
... 0x8000 + 0x94fc
Machine type: +3
BIT n,(IX ... /> 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 …
Tested 3 further grey +2's with ... /> 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 …
... 0x8000 + 0x94fc
Machine type: +3
BIT n,(IX ...
Contended IN... passed
Floating bus... skipped (B=0x01)
Contended ...
