Testing emulators with ZX X-MAS '19 Demo

[Weiv]

Thanks for the topic. I also have found and fixed a bug in my emulator related to ULAplus. The bug is incorrect realization of port #FF3B reading (due to fuzzy specification of ULAplus) - seems like it returns either color of the last color register or last ULAplus mode, depending on the last value sended to port #BF3B.

[PeterJ]

Hi [mention]Weiv[/mention],

Which emulator is yours?

Peter

[Weiv]

Hi Peter, mine is Spectramine.

[Weiv]

Also, Peter, I'm not Cesar Nicolas-Gonzalez, as it is stated in your Spectrum Emulator Features Spreadsheet for the author of Spectramine.
I wonder why it is stated so?

(Also, Peter, how to appeal by nickname? If I put @ before nickname, it is still black in a message.)

[Magnus]

Thanks for the topic. I also have found and fixed a bug in my emulator related to ULAplus. The bug is incorrect realization of port #FF3B reading (due to fuzzy specification of ULAplus) - seems like it returns either color of the last color register or last ULAplus mode, depending on the last value sended to port #BF3B.

Where did you find this information? All I have found is that port FF3B returns the last colour written to the palette.

[Weiv]

Where did you find this information? All I have found is that port FF3B returns the last colour written to the palette.

I guessed from this: "Reading from port FF3B returns the last data byte written to the currently selected register. This can be used to read back the current palette or determine if palette mode is active." There:https://zxdesign.itch.io/ulaplus

[PeterJ]

Also, Peter, I'm not Cesar Nicolas-Gonzalez, as it is stated in your Spectrum Emulator Features Spreadsheet for the author of Spectramine.
I wonder why it is stated so?

(Also, Peter, how to appeal by nickname? If I put @ before nickname, it is still black in a message.)

Hi [mention]Weiv[/mention],

Firstly, welcome to the forums. Thanks for joining.

Sorry, about the wrong name against your emulator. Please could you provide your name and I will make the changes. Is everything else correct against the entry for Spectramine? Do we have the latest version? 1.03b

The mention system should work as you describe. Not sure why it didn't for you.

[Magnus]

Where did you find this information? All I have found is that port FF3B returns the last colour written to the palette.

I guessed from this: "Reading from port FF3B returns the last data byte written to the currently selected register. This can be used to read back the current palette or determine if palette mode is active." There:https://zxdesign.itch.io/ulaplus

Thanks [mention]Weiv[/mention], well spotted!

[Weiv]

Hi @Weiv,

Firstly, welcome to the forums. Thanks for joining.

Thanks but I'm here since 2018, rather "welcome back".

Sorry, about the wrong name against your emulator. Please could you provide your name and I will make the changes. Is everything else correct against the entry for Spectramine? Do we have the latest version? 1.03b

It's ok, I just wondered, but it was a mistake, I understood. I'm not ready to uncover my real name, state me please as Weiv.
Everything else about Spectramine in the table seems ok. Yes, version 1.03b is the latest published.

Also, author of Xpeccy is Alexandr Sinyakov (it is stated in his profile on zx-pk.ru).

The mention system should work as you describe. Not sure why it didn't for you.

Thanks, [mention]PeterJ[/mention]. I understood, it is need to type @ and first letters of nickname, then choose nickname from list. Typing @nickname fully is not working.

[PeterJ]

Thank you [mention]Weiv[/mention],

All changed. I appreciate the corrections and checking.

The mention system uses Javascript. Maybe your browser is blocking it? I checked in Chrome and Firefox desktop versions.

[Weiv]

Thank you @Weiv,

All changed. I appreciate the corrections and checking.

The mention system uses Javascript. Maybe your browser is blocking it? I checked in Chrome and Firefox desktop versions.

Thanks.

No, Javascript is on, it change @nickname to [mentiоn]nickname[/mentiоn] in the message text, but if I don't choose a nickname from list, @nickname remains as is. For example - @Weiv and [mention]Weiv[/mention] . But it doesn't matter.

[azesmbog]

I'll have to do some debugging to see what happens.

Checked the latest version of the emulator, still, in the ULA + mode, some problems are present, in a couple of other demonstrations.

[PeterJ]

[mention]azimov[/mention],

Pease could you list the demos you are using please?

Out of interest, are you the same [mention]azesmbog[/mention] who wrote some of the ZXUno cores?

[azesmbog]

Pease could you list the demos you are using please?

ULAp256b
https://www.pouet.net/prod.php?which=82424
https://zxart.ee/eng/software/demoscene ... /ulap256b/
works correctly in:
Spud v.0252, SpecEmu
doesn't work at all in:
SoftSpectrum 48, LnxSpectrum

ABBATONE
https://demozoo.org/productions/269470/
works correctly in:
Spud v.0252, SpecEmu, SoftSpectrum 48
does not load in:
LnxSpectrum

Multicolour Demo
https://sites.google.com/site/ulaplus/M ... edirects=0
works correctly in:
SpecEmu
doesn't quite work correctly in:
SoftSpectrum 48
no line sync

doesn't work correctly in:
Spud v.0252
doesn't work at all in:
LnxSpectrum

Out of interest, are you the same @azesmbog who wrote some of the ZXUno cores?

Wrote - this is of course loudly said They usually write from scratch.
Most often I redo someone's work, adapt, clone, improve, do conversion from one system to another, reverse engineering, disassemble, etc.
I'm an enhancer to what other Creators have done, and I always hope the original creators don't mind seeing their work on other platforms. Sometimes I give advice to authors, sometimes they listen to them

[Magnus]

I'll have to do some debugging to see what happens.

Checked the latest version of the emulator, still, in the ULA + mode, some problems are present, in a couple of other demonstrations.

Thanks! I've had a look at the ULAp256b demo, and the problem is that the demo repeatedly activates the ULAplus palette, even when it is already active. SoftSpectrum 48 went through the somewhat time consuming process of activating the palette every time this happened, which caused a major stutter in the demo. I haven't seen this behaviour before but it was easy to fix.