-
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 ...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…
... appear to be the +2A/+3 incompatibility (as with the Russian ... was aware of the +2A/+3 "floating bus" (or lack of) issue and ...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]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 ... implement it are the +2A/+3 (except my +3 of course :D )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 ... it are the +2A/+3 (except my +3 of course :D )[/QUOTE ... 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 ... = SE1
2 = SE0
3 = SE1
The SE ...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…
... 2 48K machines and Issue 3 48K machines handled the keyboard ... +3 are significant, the most famous of which is the "floating bus", which ... to not work on the +3.Question on copying screen bufferHi, Al my prevoius games were copying graphics directly to screen memory starting at 16384. Now I'm experimenting with screen buffer where I could d…
... . Previous trick are using the floating bus (not compatible with all Spectrum ... .
Edit:
Tip 3: Don't copy the whole ...Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
... compromise between a real 4:3 Speccy screen and the native ... . still no accurate contended memory/floating bus emulation.)
This way ...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 ... works on the +2a or +3, and i didnt dig too ...Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... more interfaces then value of floating bus can be unstable !!!
* bits 3-2 (up/down) will never ... on bits 5-7 is floating bus. But all modern interfaces (and ...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…
... 't look right.
3. Reading from any non-existing ... you need to emulate the floating bus to prevent a number of ...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…
... be finalised.
[QUOTE]3. Reading from any non-existing ... you need to emulate the floating bus to prevent a number of ... -up resistors on the data bus causes it to float high ...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…
... and the +2a is the floating bus, and more games than you ... the screen. With a +2a/+3, Amstrad fixed that "bug" and ...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…
... uncompatible. Avoid.[/QUOTE]
The +3 isn't that incompatible, there ... . The biggest problem with the +3 is the awful AY output ... +2A is identical to the +3, and the +2B is mostly ... games, cause if *fixes* the floating bus, which is only there because ...
