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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 ... -
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 ... run at all on a +2A/+3, independent of the control ... 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 ... removed this "feature" for the +2A/+3, so games which relied ... -
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, …
... incompatibility with Arkanoid in a +2A? I load the game but ... the standard spectrum "floating bus" behaviour that the +2A doesn't reproduce. This ... />
(In some cases, the floating bus check code can be replaced ... -
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 2 black +2A's with the poke both ... /> 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 …
and the +2A's without the poke :oops:< ...
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…
... I ask any 128 / +2 / +2A / +3 owners to test the ... the 128K / +2 and the +2A / +3.
Cheers.[/ ... /> contened in...failed (0xfd)
floating bus....skipped (b=0x01)
contended ... 0xfd)
Spectrum +2E ( +2A with Garry Lancaster roms)
Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…
... /> Contended IN... passed
Floating bus... passed
Contended memory... ... br />
On a black +2A, loaded in 128 mode via ... Contended IN... passed
Floating bus... skipped (B=0x01)
... I then tried another +2A and the program kept crashing ...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…
... /> Indeed, this is the "Floating bus" issue mentioned by Phillip.
floating bus" instead.
floating bus" method of screen synchronisation ... /> The +2A/+3 do not have this floating bus behaviour, and ...Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... bottom border by reading the floating bus and looking for a particular ... for compatibility reasons with the +2A/+3 though.Russian Translations...As i have once again been reminded (by the "Homebrew games" thread), there are some funky looking Russian games that I can't play due to not understa…
... issues appear to be the +2A/+3 incompatibility (as with the ... /> I was aware of the +2A/+3 "floating bus" (or lack of) issue ... to fix that on a +2A. But I guess there's ...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 ... 't implement it are the +2A/+3 (except my +3 of ...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 ... 't implement it are the +2A/+3 (except my +3 of ... if it's actually a floating bus issue or other pesky incompatibility ...worth buying a zx spectrumAs i have been watching Micro Men i have been really thinking about buying another Spectrum. Now as i grew up in the 80's and was a massive speccy fa…
... ]
This one adds floating bus support:
[url]http ... doesn't clash with the +2A's ports.Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
Quicker and easier would be to try reading from the AY [i]data[/i] port. Floating bus => 128K, same as AY [i]register[/i] port => +2A/+3. Might make debugging on some emulators harder though.IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... DivIDE places data on the floating bus. This will kill this idea ... emulation only works on the +2a or +3, and i didnt ...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…
Trust me not as I'm not that techy, but I think the +2A and +3 can't use the floating bus trick to know if the ULA is drawing the border or not. That's what made many games such as Arkanoid not work with those models.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…
na_th_an is entirely correct: the +2A/+3 do [i]not[/i] have the floating bus.What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... the 128k and the +2a is the floating bus, and more games than ... synchronise the screen. With a +2a/+3, Amstrad fixed that "bug ... only go with a +2a if you want the most ... a grey one - the +2a was black, otherwise identical in ... looks to the +2a.
D ...What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... 't run because of the floating bus and that can be bodged ... . Stay away.[/QUOTE]
The +2A is identical to the +3 ... games, cause if *fixes* the floating bus, which is only there because ...What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... games, cause if *fixes* the floating bus, which is only there because ... the hardware fix for the +2a/b/+3?
[IMG ... read from the video data bus, by means of three-state ...The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... plague.
Get a +2A with the +2B board (which ... been modified to fix the floating bus bug (not by me, previous ...What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... page contention of the +2A rather than the original 128 ... because the +2A has the page contention that ... to a +2A to deal with games that read the floating bus, and ... hardware that requires ROMCS on the expansion bus. Using ...What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... can correct memory layout to +2A mode also (ram 0-3 ... (ZX ignore reading and return floating bus). Ports acceleration can be also ... be used as on ZX128+2A/+3 (A15=0,A14=1 ... /+2 memory layout (as on +2A). But some demos and multicolors ...What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... ZX ignore reading and return floating bus). Ports acceleration can be ... memory layout (as on +2A). But some demos and ... ignored (same as on ZX128+2A/+3)
- new ... adressation as on ZX+2A and is write only ... fast similar as on +2A (not contended). Snow effect ...Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …
... return value FF as ZX128+2A. Keyboard use same layout as ... of reads on unattached ports (floating bus/not)
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[*]We ...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…
... , please?[/quote]
+2A timings
Floating bus support (needed for things ... (best compatibility of all)
+2A contended banks (because the original ...Spectrum DIVIDE and Kempston Interface ProbsI got my DIVIDE quite a while back and was using it on a Spectrum +3, but noticed some games loading corrupt and not all games having proper joystick…
... is to get a spectrum +2A (or +2B - doesn't matter ... and soldering a wire for floating bus support so that games like ...same game diffrent versionwhich games have diffrent versions of the same game
... -released when Amstrad broke the floating bus.....[/QUOTE]
Yes, I ... to work with the +3 / +2a.
