Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-24, 00:53

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Somehow I missed all the notifications for this thread, glad you discovered the rogue component @appiah4! Sorry for the confusion about C9/C10... it was a real mixup on my end and I had old versions of the Gerbers checked into the GitHub repo for a long time. As you saw in my photos, the boards I …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-18, 21:20

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Visually, everything looks OK to me. As MJay99 points out, it's not possible to read U7 or U9 but all other components look correct. The soldering looks excellent! I've been thinking about creating a debug firmware and a program in DOS that writes to certain IO addresses to try and point to …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-17, 23:57

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

MJay99 has some good suggestions. Connecting a TTL serial adapter up to the UART TX port on the PicoGUS can tell you if it's trying to boot. If you see it booting but pgusinit still fails, then something is preventing it from responding to bus events. See this post for how to poke at it with debug …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-12, 14:48

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Hey @polpo There seems to have been a silent v1.1.1 revision to the gerbers in the git - is there anything fundamentally changed that would make rebuilding the card worthwhile? There's no functional change with the v1.1.1 gerbers, but it solves a long-standing issue with the KiCad project, the …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-04, 16:09

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

FreddyV and I have talked a lot together about our projects and we share a lot of opinions (but we do have some differences 😉). He is developing a card even more capable based on the Pico called PicoMEM - search for it here on Vogons for an idea of what it can do.

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-01, 17:57

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

@poplo Wouldn't the 600 MHz Teensy 4.1 solve many of your emulation problems? Yes, it is more expensive than the Pico but still affordable, especially when it comes to replacing GUS... I’ve thought about the Teensy 4.1 and I have one waiting to be experimented with. When I started this project they …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-01, 16:07

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Thanks a lot for the info. I actually got 74CB3T3245 but got confused after looking at interactive BOM :) Hope TSSOP parts won't be an issue as I don't have a microscope right now. Just a small idea, would it be possible to use a bit larger footprint (DIP would be best) in next iterations :) DIP is …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-30, 15:26

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

hellooo, just a quick question about U2, Should it be 74CB3T3245 (https://github.com/polpo/picogus/blob/main/hw/bom.csv) or 74LVC244 (https://polpo.org/picogus/bom/) ? I found two conflicting part numbers at BOM CSV and interactive BOM. Anyway both looks like to work similar with similar pinout. …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-19, 20:42

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Just wondering if there is some debug commands we can run to test the picogus to help troubleshoot any issues with the card? I should probably write up an article about this on the GitHub wiki because there’s a lot you can do for troubleshooting… A basic “am I alive” test that you can do on PicoGUS …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-19, 17:22

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Just got PCBs from JLC PCB (USD 9 for 5 PCB including shipping) and SRAM, DAC from Aliexpress :D Gonna order other parts from Digikey and build it :) I plan to build one as GUS and other one as OPL. I think I don't need the SRAM to be soldered for the OPL one ? isn't it ? That looks great in white! …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-16, 04:29

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Hi Ian! Can we expect a new firmware release soon? More on the GUS side emulation? Thanks! I mentioned GUS improvements in the livestream that I had last month, but after looking at the state of the code... all of my supposed "improvements" were commented out. 😓 I had been experimenting with a …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-12, 19:42

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Where do you live Ian? Asking to figure out shipping costs Also, what platforms do you need? I'm in the US, Colorado specifically (as evidenced by the flag on the back of the PicoGUS). The biggest need was a VIA MVP3 chipset Super Socket 7 board, as I've gotten multiple reports of DMA issues on …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-12, 01:55

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

sofakng wrote on 2023-06-11, 14:48: By the way, do you have a donation page? I tried to look couldn't find anything. I've finally added a Ko-fi link to my Github. Also I'd gladly take any motherboard donations, as I'd just use any monetary donations to buy any motherboards with chipsets I don't …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-11, 03:50

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

In my humble opinion, accuracy is quite good. I have a real GUS and to my ear the sound is right on. I've listened to songs hundreds of times on my real GUS as well as on PicoGUS and my ear for picking out differences is pretty good. One thing to mention, though: in the most recent couple firmware …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-06-07, 09:21

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

I am planning to build one when time permits :) Is there any OPL3 emulator project we can integrate with this ? :) edit:ordered 5 PCBs in white colour for a change ;) Isn't Nuked-OPL3 open source and pretty much perfect? I've tested several OPL3 emulators including Nuked and they are all far too …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-05-26, 04:18

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Hopefully I'll get to stream again soon, perhaps this weekend. It was pretty fun! I'm trying to do it on the weekend during the day US time so people in Europe can also watch live. If you follow ianpolpo on Twitch you'll be able to get notified when I go live. I've been simultaneously streaming on …

---

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2023-05-24, 13:29

by

by polpo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Even if this card only had the disk emulation feature, it would be a game changer. Being able to select disk images on a microSD card in the BIOS is amazing and so much more flexible than XTIDE. And then there's everything else that it can do. Thanks for the kind words about the idea that got you …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-04-21, 05:31

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Sorry, no SBOS. The current PicoGUS design does not connect the IOCHCHK pin so it can't generate NMIs, which SBOS and MegaEM need. Unfortunately you will not be able to hear the dulcet tones of "SBOS Installed!" in emulation on a PicoGUS. I left the pin out because GPIOs on the Pico were at a …

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-04-21, 05:08

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

Jazz Jackrabbit and Pinball Fantasies don't use the GUS MIDI patches so that is not the problem... Both have been tested a lot so should work, but it's possible that a regression in the latest 0.6.1 firmware broke them. Give 0.6.0 or 0.5.1 a try.

---

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-04-20, 18:45

by

by polpo

in Marvin \ Sound

in Marvin \ Sound

I have also taken the plung into making a picogus, but have run into an issue, the same issue that root42 on youtube is having. The card works on adlib, but when I try a gus pgusinit comes back card not responding to GUS commands on port 240. This is the only sound card in the system, and I have …

---