Spectrum Computing

The PS4 and XBox One drivers was written by myself, but the XBox 360 driver was written by Rene, the Circle library author because I don't own a Xbox 360 gamepad. Could be that Rene was using a Xbx360 clone, I can't remember very well. Probably a good option would be a Mayflash Magic NS USB adapter,...

In a double-blind test, few people can say what's the FPGA-emulation and what's the emulator. Except by the less known fact that doesn't exist a FPGA implementation so accurate as a good emulator. Could be that, in a future (near?) somebody publish an accurate FPGA core, but today doesn't exist. ZX...

In a double-blind test, few people can say what's the FPGA-emulation and what's the emulator. Except by the less known fact that doesn't exist a FPGA implementation so accurate as a good emulator. Could be that, in a future (near?) somebody publish an accurate FPGA core, but today doesn't exist. ZX-...

Ralf wrote: ↑Fri Oct 02, 2020 12:21 pm By the way, anybody knows who is/was Pedro Gimeno?

Pedro IS a smart guy born in a town named Algemesí, near to Valencia (Spain). I know Pedro from many years ago. Sadly, isn't interested in retro scene.

According to Chris Smith’s The ZX Spectrum ULA , the Spectrum’s pixels are perfectly square. I guess that isn't possible. Chris explains that a timing difference between logic gates produces a non-equal pixel when the ULA do a transition from 0 to 1 and 1 to 0. The Woody's demo Brightminer shows an...

J2112Z wrote: ↑Fri Sep 11, 2020 2:00 pm

zx81 wrote: ↑Fri Sep 11, 2020 11:09 amAre you tried with another TV set?

It's not the TV, as I get sound through HDMI using Retropie, with no problems.

ZXBaremulator uses a non-usual sample rate for audio, 32 khz. I guess that some TVs have problems with it.

The PI firmware chooses the sound output automatically. When you have a HDMI device connected, the sound is sended to it. When no HDMI device is found, the sound is sended to PWM.

Are you tried with another TV set?

If anyone here uses a Speedlink Competition Pro with zxbaremulator. Does anyone know if you can map the buttons? For me it defaults to the small trianle buttons instead of the big round clicky ones. Great emulator btw. When I remember correctly, this joystick claims to be compatible with DirectInpu...

An hour ago, I've seen an "out of memory" error. A server reboot is the only one option when server runs Windows. But, if you're using Linux is the worst option on the long run.

Can't find Paralactika demo in tap/tzx format, to test it on 128k models, I only have a trd version. I saw in soime youtube video "paralactika_zx128" or something like that but the author did not leave a link. Can you share some download link for that version, which you used when testing ...

Today I continued testing BM 3.2 and found some rough solution how to avoid (mostly) that buzzing sound. I noticed that after each reset with CTRL + Break, the buzzing stops and then I can enter the menu with F1, select the game and go back to the emulator, without that sound issue. It’s not too el...

Can't find Paralactika demo in tap/tzx format, to test it on 128k models, I only have a trd version. I saw in soime youtube video "paralactika_zx128" or something like that but the author did not leave a link. Can you share some download link for that version, which you used when testing ...

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...

The ZX-Uno's Spectrum 48k core is basically correct, but the contended memory timings is wrong on all cores, all FPGA's I know. The 128k core isn't complete and the FPGA PLL can't generate the needed CPU freq. for the model (is off by 8 kHz). The +2a is the same core than 128k with the +2a ROMS. Ho...

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...

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...

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 keyb...

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...

TMD2003 wrote: ↑Wed Jul 29, 2020 11:14 pm Just in case I missed something, somewhere...

Would this emulator work with an original 2012-spec Pi? (i.e. this one)

Yes, it's supported.

The ulatest3 by Jan Bobrowsky, modified by Chris Smith. You can get it from here: http://dlcorp.nedopc.com/download/file.php?id=2735&sid=5b4a53ae80782de504f569910926db5b looks like this one needs strict 48k emulation, not even the 128k in 48k mode The first ulatest3 was for 48k only. Probably, ...

RMartins wrote: ↑Thu Apr 30, 2020 4:58 pm Is there any test, that we can run, to determine if the floating bus is correctly implemented ?

The ulatest3 by Jan Bobrowsky, modified by Chris Smith. You can get it from here:

http://dlcorp.nedopc.com/download/file. ... 910926db5b

I'm interested to know if it's possible. You can edit the config.txt on the ZXBME Sd card.. use hdmi_mode=6 If you are on hdmi_group=1 , mode 6 is a 480i (4:3) mode. You may find the stretch on your TV will work properly then. More info of HDMI modes here : https://www.raspberrypi.org/documentation...

PeterJ wrote: ↑Tue Apr 28, 2020 2:51 pm
Does the library recognise USB devices plugged in? As I have one of these?

I bet not. You you can try...

The USB support is a hard task for a bare-metal program. And without the Broadcom documentation.

Hi @zx81, Very many thanks for ZXBaremulator 3.2. I tried it for the first time today, and I'm very impressed! Nice work. Thanks. Can I ask a few questions. As I say, I have not been following the project, so sorry if these have been answered elsewhere: Would it possible to allow SSH connectivity i...

Thanks by your investigations, Pegaz. The 'amixer' command is an ALSA command, so only works under Linux. As I said before, all the video/audio management is done by the PI firmware at boot.With a HDMI TV connected, sound outputs through HDMI. When no HDMI TV is connected audio/video are redirected ...