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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…
... quite exact emulation of the floating bus (but also related to the ... (to actually see it).
3. Put a breakpoint on #9C89 ... -
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…
... quite exact emulation of the floating bus (but also related to the ... (to actually see it).
3. Put a breakpoint on #9C89 ... -
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…
... determined that the +2A/+3 machines have a floating bus, and figured out ... Spectrum game to use the floating bus on [i]all[/i] ... br />
The floating bus on the +2A/+3 behaves differently from the ... 13 . . . 4093)
2. The bus always returns $FF if bit ... -
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…
... . I ended up having the +3 floating bus tied to the display renderer ... -
New Game: A Yankee in Iraq (2017). A shoot-em-up.Last year, I [url="https://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992"]resurrected my old shoot-em-u…
... optimizations
—Now uses the floating bus for synchronization. [b]The first ... use this method on +2A/+3 machines![/b]
Instructions ... -
Should I sell my +2A?The +2A was the last Spectrum I bought and to be honest I never gave it much use :| Unlike the 48k, 48+ and +2 grey on which I have played many ga…
... -people-with-a-2a-3"]solved the floating bus mystery[/url] on the ... +2A/+3, many previously incompatible games ... also trivial to modify the 3.5 mm jack to accept ... -
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…
... tackled down the floating bus nitty-gritty on the +2A/+3, I have ... -
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…
... tackled down the floating bus nitty-gritty on the +2A/+3, I have ... of fb on the +2A/+3, and wrote that test primarily ... -
New Game: A Yankee in Iraq (2017). A shoot-em-up.Last year, I [url="https://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992"]resurrected my old shoot-em-u…
... , or was that only a floating bus test aid?
Here ... &action=defaultclick"]the +2A/+3 floating bus version of SpecEmu[/url], as ... -
New Game: A Yankee in Iraq (2017). A shoot-em-up.Last year, I [url="https://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992"]resurrected my old shoot-em-u…
... decided to tackle the floating bus on the +2A/3 was because I ... or was that only a floating bus test aid?[/quote]
... Yes, just a floating bus visual gimmick. That’s the ... amp;action=defaultclick"]the +2A/+3 floating bus version of SpecEmu[/url], as ... -
Most accurate display on emulatorWhich Windows emulator has the most accurate display. I am making a game and one of the tiles is not showing correctly on an real spectrum +2 machin…
... after we tackled the floating bus on the +2A/+3, SpecEmu and Spectramine ... -
Things you only found out recently2014 - First found out about the existence of the QL, by the time I was reading magazines all mentions had ceased. 2017 - Found out that Frank Sid…
... the +2A/+3 machines [i]do[/i] exhibit the floating bus quirk, and ... -
Introducing SpectREMYep, yet another Spectrum emulator, this one being for Mac OS. Writing my own Spectrum emulator has been a bucket list item for a while. While I'm…
... proper emulation of the floating bus on the +2A/+3, and yours will ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... the mystery of the floating bus on the +2A/+3, so I feel ... -
Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …
[code]
ld a,(2899) ;+2A/+3 ROMs return 126
cp 126
jr z,its_a_plus
[/code]
That’s how I did it in [i]A Yankee in Iraq[/i] to handle the floating bus sync differently on these machines. -
Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …
... reliable detection of a +2A/+3 that [i]does not[/i ... from contended RAM on the bus
ld a,$0f
3
[/code]
The ... know how the floating bus behaves on the +2A/+3. Follow the link ... -
MAME in spectrum emulationHey to all Does anyone use MAME as a emulator port for any Speccy HW? I was so far away from MAME developments I forgot they merged with MESS whic…
... to implement the floating bus behavior on the +2A/+3; others seemed to ... ? The ULA snow effect? The floating bus? Accurate sound? Timings? Otherwise, why ... -
MAME in spectrum emulationHey to all Does anyone use MAME as a emulator port for any Speccy HW? I was so far away from MAME developments I forgot they merged with MESS whic…
... to implement the floating bus behavior on the +2A/+3; others seemed to ... ? The ULA snow effect? The floating bus? Accurate sound? Timings? Otherwise, why ... -
Modern Spectrum Games Advent CalendarSo... it is done. The main reason for my return from the shadows earlier this year was because I knew the greatest Christmas present I ever had was c…
... was for the +2A and +3. I found that side A ... 't run on the +2A/+3, but side B would run ... +2, since it uses the floating bus to synchronize) is there because ... -
Modern Spectrum Games Advent CalendarSo... it is done. The main reason for my return from the shadows earlier this year was because I knew the greatest Christmas present I ever had was c…
... ;930186"]since it uses the floating bus to synchronize[/quote]
I ... in situ. The floating bus synchronization for the +2A/+3 would have to ... handle both types of the floating bus. There’s plenty of time ... -
Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... in simple terms what a 'floating bus' is? I read the ... other changes, they “fixed” the floating bus problem, thus rendering the games ... Spectrum +2A/+3 did in fact have the floating bus all along, ... first game to use the floating bus on these machines.
< ... -
ForumsWe are aware that the forums have suffered with the CPU fix a few weeks ago. Fortunately, we were already working on new forums that will address the…
... the discovery of the floating bus on the +2A/+3 started with my ... -
Fuse for macOS 1.5.1 ReleasedA new version of Fuse for macOS has been released at the dedicated sourceforge project: https://sourceforge.net/projects/fuse-for-macosx/ Note …
... complete emulation of the floating bus on the +2A/+3. Looks like it ... -
Fuse for macOS 1.5.1 ReleasedA new version of Fuse for macOS has been released at the dedicated sourceforge project: https://sourceforge.net/projects/fuse-for-macosx/ Note …
... complete emulation of the floating bus on the +2A/+3. Looks like it ... the proper operation of the floating bus emulation and add it to ... -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
Neat. Does it emulate the floating bus on the +2A/+3? -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
[quote="Ast_A_Moore;936154"]Neat. Does it emulate the floating bus on the +2A/+3?[/quote]
No, it doesn't yet :( I just did the +2A timings during the last month, and I forgot that there was a floating bus-like effect in these models... -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
[quote="Ast_A_Moore;936154"]Neat. Does it emulate the floating bus on the +2A/+3?[/quote]
lmao, give that person time! They already said there was stuff they needed to implement first lol -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
... . Does it emulate the floating bus on the +2A/+3?[/quote]
floating bus-like effect in these models ...Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... Spectrum +2A/+3 did in fact have the floating bus all along[/quote ... discover the +2A & +3 had a floating bus...
https://www ...
