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Forum Index : Microcontroller and PC projects : Unix on the Pico Computer 3
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
Symptoms, repeatability, keyboard used anything that might actually be useful to me instead of just "doesn't work" |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
They're the same problems as in my previous messages in this thread. They're 100% repeatable. I can use the computers from a serial terminal but when I try to run HDMI video and USB keyboard I can't use either Pico Computer 3 at all. In some cases, as soon as the login: prompt appears, it starts repeating over and over requiring a power down. Sometimes I actually get to log in but very soon after either the keyboard is not seen or the last character I type repeats over and over. After a power off/on, the disk is checked for errors and says immediate reboot required. The system reboots and when it comes back, there's no keyboard. I have to turn off the power and turn it back on to get the keyboard to be recognized. I have used several USB keyboards on two different Pico Computer 3s. The exact same problems occur on each. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
Have you done the pcb mod? If not please try it on one of your boards. I can't replicate your problem but all my boards are now modded. |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
One has the mod, the other doesn't. |
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| mozzie Guru Joined: 15/06/2020 Location: AustraliaPosts: 424 |
G'day Toml_12953, I hope this is not stating the obvious but have you tried a different USB lead? I have had this problem with several boards running MMBasic and it has nearly always been voltage drop on the USB lead from PC-Pico, one looks really heavy duty but will nearly always fail, and a cheap skinny no-name jobby is bullet proof. Also different USB ports seem to output more juice than others. Really depends on how much expensive copper is hiding under the cheap plastic. YMMV. Regards, Lyle. |
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Bryan1 Guru Joined: 22/02/2006 Location: AustraliaPosts: 2227 |
edit: wrong thread Edited 2026-08-18 17:08 by Bryan1 |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
I haven't so far but will try a different power supply later today and report back. Thanks for the suggestion! |
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karlelch Guru Joined: 30/10/2014 Location: GermanyPosts: 353 |
Post Preview Close Hi Peter, I'm trying to run FUSIX on a minimal hardware, using a PGA2350 (see picture below).  It starts booting but then after mounting the SSD, it fails (see below).  I haven't tried a different SD card (will do) and the wiring may be a bit too hacky, but is there anything else on the software side that I might have missed? One more thing: Currently the presence of the clock chip is used to determine if it is running on a PC2 or PC3. I don't need the clock (at least now) but I would like to use the "true" SPI connection to the SD card reader as the PC3 is offereing. Would it be possible to add another way to set the pins/mode for the SD card reader? Or check in addition if a so far unused pin is high for this test? Cool project! Thanks Thomas Close |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
If you don't have a RTC and GP27 isn't wired use the PC2 sdcard wiring. If you connect a RTC and GP27 to the 32K output then the firmware will know it is running on a PC3 and you must use its sdcard wiring. You can uses SPI for the SDcard unless you connect and RTC, This was a mistake of mine on the PC2 but MMBasic, MicroPython and now Fuzix work round it using a bitbanged sdcard driver. I don't think this is particularly any slower. In both the PC2 and PC3 you really should have a RTC as this is used for timestamping files etc. Edited 2026-08-18 20:33 by matherp |
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| karlelch Guru Joined: 30/10/2014 Location: GermanyPosts: 353 |
Ok, thanks. Then I'll first try to get it working with the SD card in "PC2 mode" and then add an RTC - I should still have one somewhere. |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
What a difference! I had been using a "45W CanaKit" power supply which has always worked on other Pis in the past but at your suggestion I switched to a different power supply and have been running for a while now with no problems at all. Now this thing is really useful. Thanks, moz! |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
v0.16 is now available https://github.com/UKTailwind/FUZIX/releases/tag/pc3-v0.16 This was a fun one. The challenge was to create a version of Martin and Harm's Petscii robots that could be compiled and run under Fuzix. This required some additional functionality building into the transpiler and compiler but the major job was getting all the bits, images/ sound/ logic working together. This is now working and Petscii is included in the /root/MMBasic folder. You can use the USB keyboard to run it or 8 switches between pins GP34-GP41 and GND will mimic the Game*Mite. I just tested with a Game*Mite PCB with just the switches mounted and flying leads from the J10 header |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 2056 |
I was starting to have matherp-update withdrawals  |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
Two observations. 1) In the code below, there's no way to stop the MMBasic program. Ctrl-C is ignored. 2) When entering mmedit, the function key line takes quite a while to become visible unless the cursor is moved. 100 PRINT "INPUT THE REST MASS OF THE BODY IN KILOS:" 110 INPUT M 120 GOTO 170 130 PRINT "RELATIVE MASS","VELOCITY(MPS)","% OF C" 140 PRINT 150 GOTO 210 160 PRINT 170 LET C=2.997925*10^8 180 PRINT "VELOCITY OF LIGHT IS ";C;" METERS/SEC!" 190 PRINT 200 GOTO 130 210 FOR V=0 TO 3E8 STEP 10 220 LET R=M*SQR(1/(1-(V^2/C^2))) 230 PRINT R,V,(100*V)/C;"%" 240 NEXT V 250 END |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
ctlr-C works for me using exactly your program UPDATE When using teraterm but not a connected USB keyboard. Found and fixed. Edited 2026-08-19 18:35 by matherp |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
In V17 when a program is beautified, the message in red flashes on and off too fast to read. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
That one I really can't replicate. Please post a basic program that demonstrates the issue. The only message should be " KEEP BLANK LINERS? (Y/N) " in black on a red background which is what I see |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
After the beautification is done there's a message that it's done (something like Program Beautified or something like that) That's the message that disappears too quickly to see. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11779 |
I've tracked it down. It is because you are the only person (in the world?) who insists on still using line numbers  . I've fixed it if you want to re-download v0.17 |
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| toml_12953 Guru Joined: 13/02/2015 Location: United StatesPosts: 713 |
What can I say? I don't have the time to convert over 3000 programs! Thanks for the quick fix.  I looked for the changed program at https://github.com/UKTailwind/FUZIX/releases/tag/pc3-v0.17 but that's the same as the version I have. Is there another place to look for it? Edited 2026-08-20 07:46 by toml_12953 Footnote added 2026-08-20 20:25 by toml_12953 OK, I see that it was the card image that changed, not the uf2 file. I updated my SD card and everything is fine again. Thanks! |
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