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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 ... -
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…
... / +2 and the +2A / +3.
Cheers.[/QUOTE]
machine type...+3
bit n,(ix+ ... contened in...failed (0xfd)
floating bus....skipped (b=0x01)
contended ... contention2...passed
Spectrum+3
Before today, ... -
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…
... 0x800+0x94FC
Machine type: +3
Bit n, (ix+d ... 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 ... 128K (but not on the +3). If that's true, Fuse ... -
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... ...
Tried 3 further grey +2's cold ... 0x94fc
Machine type: +3
Contention offset: 0x08
Floating bus... skipped (B=0x01)
... -
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 …
... button
D6- joy FIRE 3 / middle button
D7- ... for ZX16,48,48+ !!!
3) SWITCH "EN31" (enable/disable read ... fixed vector table adress (correct floating bus value):
===========================================================
... -
Blizzard's Rift in Spinanyone else having trouble playing blizzard's rift in spin, the game loads ok, you can select controls, select a system to visit but when you select …
... the +3 - not least of which is the totally different floating bus behaviour ... (which isn't present at all on the +3 ... 128k cheerfully ignores, then the +3 might actually respond (though that ... -
Quotes from Speccy GamesTry to find this one: "No Sax please, We are Egyptians!"
... game in question uses the "floating bus" for synchronisation with the display ... work unmodified on a Spectrum +3
as follows:-
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 therefore ...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 ... compatibility reasons with the +2A/+3 though.TIMEX Sinclair 2068 => ZX Spectrum/Timex2048?Hello. I have opportunity to buy Timex Sinclair 2068. According to www sites dedicated to Timex machines, TS 2068 can handle only 7% (!) of Spe…
... that requires an OUT 244,3 instruction will do the trick ... 50hz, different T-states, no floating bus on port #FF). More than ...Which is the most technically accurate Spectrum Emulator?Ok, which is the most technically accurate Spectrum Emulator? Please don't just vote but give reasons why.
... Contended IN... failed (0xfd)
Floating bus... passed
Contended memory... failed ... /> CB (00-FF) 5+3 RAM
Spectaculator ... /> CB (00-FF) 5+3 RAM
RealSpectrum ... 44/47 | 54/57 |
| 3. Spud | 10/10 | 37/47 ...Which speccy do you use & why ?I`m lucky enough to have the choice of using a 48K original, a 48K+ and a 128+2B Sometimes I prefer the 128 because of it`s nice keyboard, crisp pic…
[QUOTE=Hercules;364985]Plus 3 is a great machine, apart ... the hardware issues affecting the +3 (no floating bus, edge connector differences, broken ...Which speccy do you use & why ?I`m lucky enough to have the choice of using a 48K original, a 48K+ and a 128+2B Sometimes I prefer the 128 because of it`s nice keyboard, crisp pic…
... the hardware issues affecting the +3 (no floating bus, edge connector differences, broken ... modificaition of the +3 motherboard to perform the +3 sound fix. That ... one for tenner.
Bus issue I'm not that ... on that to work on +3 bus anyhow and don;t use ...+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
... effects routine also used the floating bus so I've bodged around ... /> 80 DATA 252,1,12,3,62
90 DATA 201 ...
210 DATA 132,1,3,0,237
220 DATA ... ://homepage.ntlworld.com/e.tinney/+3/Arkanoid.tap[/url]
