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I've just tested the v1.3.1 "Portable" control panel (see attached file in my earlier post.) while booted into System 6.0.8 and am pleased to report complete success in eliminating that bothersome tick sound every 10 seconds! Kudos to @SuperSVGA for providing that solution! Now for the bad...

Thank you very much for testing. Did you try maximizing the volume to level 7 and then listening carefully for at least 20 or 30 seconds through the headphone jack to see if you could hear a soft tick sound every 10 seconds? The reason I ask is because if your volume setting is set completely...

Well, that is beyond my capabilities. But perhaps someone much smarter than me, like @Androda , might be able to accomplish that. The goal here is to get all 7MB of a RAM Card to work without taking that 26% CPU speed hit.

@SuperSVGA Thanks! I just changed that "03"... ...to "01"... Interestingly, when I then checked the "vers" resource, it shows 1.0.3... I changed that to be 1.3.1, in light of the "hack" I just made... Attached below you will find a ZIP file containing the disk image holding the...

In your post here in my pop noise thread, you said the v1.3 "Portable" control panel for System 6 includes 2 ROM patches. I have no idea how all that works, but it makes me wonder if the ROM could similarly be patched in this case too, such that the DTACK register WOULD be accessed on wake from...

@nottomhanks Craig, THANK YOU! You sir, have the honor of being the first person who has made time to test in a similar manner to me and who has confirmed what I have confirmed! I am overjoyed at this testing because it is critically important to establish the baseline noise and what is...

Was it really "fix"? I thought there was an updated RAM card from Androda with a new switch, but then it was found to have manufacturing issues (currently being resolved). Even so, the switch was supposed to allow the user to basically do what I did. Switch to a lower amount of RAM for...

I too ran Speedometer 3.23 this evening. And I would encourage everyone else who posted benchmarks to report WHICH VERSION of Speedometer was used because the numbers change a lot among different Speedometer versions. Also note that Speedometer version 4 crashes with a trap error on my 5126...

Thank you for the advice. I just measured resistance between the two pin-1's on both SONY sound chips and individually to the Ground plane. No problems detected.

The pop sound does NOT occur every 10 seconds when I boot into System 6.0.7 or 6.0.8 while also (1) loading "Portable" control panel version 1.2 (which is made for the 5120 and therefore lacks a "Brightness" slider, using Contrast instead), or (2) not loading any version "Portable" control panel...

Meaning these two electrolytic caps... As shown on the 5120 schematic... And shown as C2 and C3 on the LT1070 datasheet... Yes, that is what I am hearing and is what I have been calling a "pop" sound.

And here is the Macintosh Portable sleep-fix on my BSv2 "fork" board, as per the Github instructions for 2023.03a:

So that command line I tested last night is disabling only U14A, while leaving U15B & U15C enabled, correct? I can only assume so because as I said last night, the background noise all went away when I tested your suggested command line, but the pop sound every 10 seconds remained audible...

There are grounds all over the motherboard, so the best way I can answer that question is with the... 1. Schematic here (keeping in mind I have a 5126, and the schematic is for the 5120). 2. 5126 board Photo below (by Bruce Rayne of Branchus Creations, not my board)

Thanks, I will do that tomorrow!

@SuperSVGA I booted my Portable into System 6.0.8 without the Portable control panel loaded. I pressed Interrupt, and at the prompt, I typed the following and pressed Return: SM FB0802 1 Suddenly, all the noise stopped. And I should say that I can very faintly hear the same background...

@Androda Sorry for my delayed reply. I've been busy testing the Portable's audio issues here and didn't have time until today to revisit this thread. QUESTION: The text on your Github page says "either... or..." and not "both" so I just want to reconfirm that info is accurate. I am talking...

QUESTION #1: As per the above, did you ever check that the 9V battery works properly? QUESTION #2: So when there is no lead acid main battery in the machine at all, that 9V battery would be keeping the 5.2V rail "powered all the time"? (The same would be true if the AC Adapter cord was yanked...

Joe, thank you. As far as the Radius Rocket with RocketWARE is concerned, it boils down to this... Compatibility: The Rocket hates sound.* The system tricks it uses to run make handling sounds a pain (if not impossible). Do not install Sound Manager 3.0 or later! It can handle SM 2.0 for some...

I did a search on Macintosh Garden for "microbug" but it yielded no results. If you meant to say "MacsBug" then please let me know what version I should use under System 6.0.7 and higher. I will then boot with your recommended version of MacsBug and give your command line and noise-check a...