ZXBaremulator 3.2

Struggling with Fuse or trying to find an emulator with a specific feature. Ask your questions here.
Mbwum73
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Re: ZXBaremulator 3.2

Post by Mbwum73 »

The original Pi1 will work however the author is having great difficulties keeping the first pi supported because of some limitations.
For instance you won't have sound over HDMI.
I think the PI2 is the best option.
It does have sound over HDMI and it's more than capable of running the emulator at full speed. A pi3/3B etc. is a bit overkill for just a spectrum.
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zx81
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Re: ZXBaremulator 3.2

Post by zx81 »

Mbwum73 wrote:
Thu Jul 30, 2020 5:14 pm
I think the PI2 is the best option.
It does have sound over HDMI and it's more than capable of running the emulator at full speed. A pi3/3B etc. is a bit overkill for just a spectrum.
The only one advantage from a better PI is a faster "fast loading".

The HDMI sound support needs more CPU than an ARMv6 based PI have. The Circle library uses a cooperative scheduler and the VC4 needs to be attended so frequently that isn't capable of execute the Spectrum emulation and send the needed sound data to the VC4. And more, in Circle all the interrupts are handled by the CPU-0, so the only one CPU present in first PI models isn't so fast to execute all the needed tasks (the USB handling needs many CPU time, the USB host on the PI is crap).

Anyway, I don't know what to do with ZXBaremulator. Develop a bare-metal emulator is a huge task and the user base is really tiny three years after the first release. Today, the people uses software emulators on PC and the alternative solution is a FPGA based board. Not many people have a PI board and many Pi users aren't interested on the ZX Spectrum. That looks as a dead end, my friend...
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Pegaz
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Re: ZXBaremulator 3.2

Post by Pegaz »

I agree.
Simply, time goes on, technology advances and people have more and more choices.
Small board computers are getting cheaper, including fpga multicore solutions, the raspberry pi 4 with latest price reduction and over 3 million units sold, it has already become a far better purchase than the old models.
The Spectrum user base is limited and dispersed, but the Baremulator certainly has its place.
I would just like to get rid of this buzzing sound, which we talked about earlier.
I don't know if you had time to investigate it, I just have this problem on each of my 3 pi models (2, 3, 3+) and I haven't been able to eliminate it, except using the old v2.0 version, which doesn't have a GPIO keyboard support.
However, BM has its advantages, such as precise emulation and the ability to easily connect the Spectrum keyboard and its also free.
I don't know which is the next equivalent variant, I guess ZX-Uno with twice the price than Pi, but also with greater potential for sure.
The new Next kickstarter is already around the corner, so everyone has something to choose for themselves...
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Mbwum73
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Re: ZXBaremulator 3.2

Post by Mbwum73 »

Still zxbaremulator is the only cheap alternative with good hdmi support and I can use my ps4 controller with it.

Alternatives? MISTer FPGA is expensive, zxuno doesn't have hdmi and other software emulators require a complete OS resulting in long boot times. The Spectrum next is unavailable and still has a timing problem with HDMI. So maybe there will be a second run, but will they also fix the hdmi problems?

So I hope you consider working on the "easy" parts like that extra keyboard led and maybe a default machine option. I know your audience is small and time is limited, but talking for myself I am a very grateful guy for what you've achieved so far.

Maybe another option is to release the source code so maybe other enthousiast can continue. Unfortunately I'm not a very skilled programmer but maybe someone else is.
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zx81
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Re: ZXBaremulator 3.2

Post by zx81 »

Pegaz wrote:
Fri Jul 31, 2020 1:33 pm

I would just like to get rid of this buzzing sound, which we talked about earlier.
I don't know if you had time to investigate it, I just have this problem on each of my 3 pi models (2, 3, 3+) and I haven't been able to eliminate it, except using the old v2.0 version, which doesn't have a GPIO keyboard support.
However, BM has its advantages, such as precise emulation and the ability to easily connect the Spectrum keyboard and its also free.
I don't know which is the next equivalent variant, I guess ZX-Uno with twice the price than Pi, but also with greater potential for sure.
The new Next kickstarter is already around the corner, so everyone has something to choose for themselves...
The problem with the buzzing sound is that I can't reproduce it on my TVs. Could be that some TVs aren't happy with the 32 kHz sampling rate I use.

The ZX-Uno is dead. I own one, sleeping in his box. Nobody develops cores for it. Now, you can choose a MiSTer, Mistica or SiDi. But don't exist a FPGA core that his behaviour will be so precise as many software emulators. And nobody have enough motivation to enhance the cores. The most important core for MiSTer is NeoGeo.

The Next isn't for me, for less money I can have a MisTer with 128MB, I can live without his pretty keyboard.
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zx81
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Re: ZXBaremulator 3.2

Post by zx81 »

Mbwum73 wrote:
Fri Jul 31, 2020 10:26 pm

Maybe another option is to release the source code so maybe other enthousiast can continue. Unfortunately I'm not a very skilled programmer but maybe someone else is.
Some "smart" guys on eBay are selling ZXBaremulator and BMC64. I don't want to get any money from my emulator, but I don't want that another shameless guy get money from it. Create a commercial "ZX-Mini" could be really easy having the source code at hand. So, the only one solution is don't release the sources. That's the sad true.
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akeley
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Re: ZXBaremulator 3.2

Post by akeley »

ZX-Uno is kinda dead, but I thought its ZX core is pretty mature and doesn't really need any further work. It's the same with MiSTer's ZX core. Do you know of any significant differences which would need fixing? We can always open issue ticket and mention it on the forums. Of course, console cores get more attention, but microcomputer's also have a big following.

BM ZX on a Pi is a good idea for sure, since it's a much cheaper option than FPGAs. Does it help with lag though? When I was using ZX emulators on RetroPie + my RPi 3B+ they've felt very laggy.
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TMD2003
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Re: ZXBaremulator 3.2

Post by TMD2003 »

Just so that you know, the main reason I have a 2012 Pi is because there were a couple on sale in CEX when I looked and I thought I'd buy the one with the case, just to experiment and see what it could do. If there was a "Big Book of Raspberry Pi Projects" published around 2013 that might be useful - but for now, seeing as I've at least made it work with a version of Raspbian from circa 2016 and some bits and pieces I had lying around, and don't intend to go a lot further, I'll explore ZXBaremulator as another option.

So as for the next question:

It is suggested that I need a minimum of 8 GB on the SD card to get even the first version of Raspbian to run properly. I've only got one of those, so that's what I've used for Raspbian. But I also have some 2 GB SD cards sitting idle - would they be OK to run ZXBaremulator from?
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MonkZy
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Re: ZXBaremulator 3.2

Post by MonkZy »

TMD2003 wrote:
Sat Aug 01, 2020 10:34 am
I also have some 2 GB SD cards sitting idle - would they be OK to run ZXBaremulator from?
2 GB is fine for ZX Baremulator.
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Mort
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Re: ZXBaremulator 3.2

Post by Mort »

I have found no lag on either the Bmc64 emulator or the ZxBaremulator , They remind me of when I had the z80 emulator running in dos on the pc, just did what is needed to do and no windoze or operating system in the way.

Just great, Bmc64 allow you to save to a virtual disk , I would love to see tape saving to a virtual tape on the zx or snapshot function to save your game position .
i have included a pic of my 2 machines I resurrected out of a dead shell and a new case. And errr the C64 made out of a old case, these all have direct input to the original keyboards by the interfaces suggested on the website which i lovingly soldered together .

I tend to use the Pi3 a+ as its small and easy to cram in the original shell (and cheaper)

Image



Image

Image

and the bmc64 built ;)
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Last edited by Mort on Sat Aug 01, 2020 10:55 am, edited 1 time in total.
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