Search found 18 matches

by zx4ever
Sat Mar 23, 2024 7:09 pm
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Thanks @Exile for your reply, helpful as always. I'll try to find out more about that HDMI hotplug fix, but now I have a place to start. Honestly, I don't know what to say more about that HDMI detection issue, but I can try to do it more precisely. Basically, if I leave the hdmi cable permanently co...
by zx4ever
Thu Mar 21, 2024 7:44 am
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Yes, the photo shows the two pads that need to be joined. Last night I managed to solder these pins and it finally worked ! There is one minor issue left, but first a few words about the emulator itself. He is simply awesome and works flawlessly. :) Very easy to use, all the software I tried works ...
by zx4ever
Wed Mar 20, 2024 7:00 am
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Either of the Olimex uf2 files will work. picozx81_olimexpc.uf2 will provide sound over the 3.5mm audio connection picozx81_olimexpc_hdmi_sound.uf2 will provide sound over the hdmi cable There was an issue with the original Olimex firmware, where stereo audio over the 3.5mm audio connection was not...
by zx4ever
Tue Mar 19, 2024 9:59 am
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Thanks for trying picozx81 :-) Some makes of TV detect an HDMI device by looking for 5V on pin 18 of the HDMI connector. Unfortunately, by default, the Olimex board does not supply 5V to that pin. However, there are two pads on the back of the board, which when shorted with a blob of solder, will e...
by zx4ever
Tue Mar 19, 2024 9:07 am
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Meanwhile, I tested the board with Audio.uf2 test program from the official Olimex Github page and sound works well through 3.5mm audio output jack. Unfortunately, the dilemma is still there, except that my Pico H obviously works, but I'm still not sure, what is the cause of the lack of HDMI connect...
by zx4ever
Mon Mar 18, 2024 4:54 pm
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

My Olimex RP2040-PICO-PC Board has arrived and I tried to start with this great emulator, but I came across an unexpected problem. I followed the procedure, I first recorded a microSD card, then connected Pico H and Olimex Board to PC via USB cable with pressed BOOTSEL button and it normaly recogniz...
by zx4ever
Thu Feb 15, 2024 11:53 pm
Forum: Software
Topic: Convert Z80!file to TAP or TXZ
Replies: 4
Views: 7864

Re: Convert Z80!file to TAP or TXZ

redgatemodels wrote: Sun Feb 04, 2024 4:28 pm Any way of going from tap or tzx to mdr?
Here you can find a tool for Z80 to MDR conversion.
There are also other useful utilities on this page, so it's worth checking out.
https://www.tomdalby.com/other/z80onmdr.html
by zx4ever
Sun Jan 14, 2024 10:46 am
Forum: Emulators
Topic: sz81 emulator
Replies: 49
Views: 41688

Re: sz81 emulator

I tried on both Pi2B v1.1 and Pi3A+ but it refuses to work. Clean install of RiscOS 5.28, emulator unpacked and started, but complains with this message. https://thumbs2.imgbox.com/df/60/murCUKcB_t.jpg After I changed the file type to App (Absolute), as in the initial version, I got an attempt to s...
by zx4ever
Fri Jan 12, 2024 7:53 am
Forum: Emulators
Topic: sz81 emulator
Replies: 49
Views: 41688

Re: sz81 emulator

I invested a few hours and tried to compile 2.3.12 on RiscOs using gcc 4 which can be installed on RiscOS. After some hacking, mainly due to RiscOs using . as a directory marker, I got it running to the K prompt. However, it did not last long on a Pi2 as it used all the CPU, starving the OS. I chec...
by zx4ever
Wed Jan 10, 2024 9:46 am
Forum: Emulators
Topic: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Replies: 45
Views: 32418

Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico

Hi,
Can we use Pico W for this project ?
I read that some GPIO pins have a different function.
Also, is there a difference in boot time between Pico H and Pico W ?