Just checked: there's no power to the board when the machine is in sleep mode. As I push any key and wake it up, power surges immediately.
BlueSCSI on Macintosh Portable
- Thread starter Sideburn
- Start date
That’s sounds the same as ours then. Only difference is my power is supplied through the scsi cable
You probably saw it already, but I confirm I take the power directly from the internal SCSI connector (both 5 and 12V, regardless whether they are used or not).
So, same working logic as the original Conner drive.
No luck here with a 10nf cap
I noticed though a lot of the time after waking from sleep the BlueSCSI powers up AND the activity LED on on the main board flashes as well as the activity led on the pi pico once or twice and then it freezes.
Heres the cap I tacked on to try it:
Right I saw what I could from the photo. My guess is that would be the same as my setup.
What about tapping power from the board somewhere over to the BlueSCSI so power gets supplied to the BlueSCSI on wake up instead of hard drive spin up? I think that would fix it but I am not sure where the best place would be on the board to get the 5V from.
It Looks like there's a pin on the floppy cable the provides +5v on wake up. If that would work without a current overload, I could make an adapter that the cable plugs into and then the adapter could plug into the floppy and supply +5 to the connector on the BlueSCSI.
That workaround “fix” solved the issue.
I ran a jumper from pin 11 of the floppy cable to +5 on the BlueSCSI and now it wakes from sleep and drive activity works immediately.
Not the best solution but it works!
I ran a jumper from pin 11 of the floppy cable to +5 on the BlueSCSI and now it wakes from sleep and drive activity works immediately.
Not the best solution but it works!
Yeah. For now I just ran a small awg wire into the pin and plugged it into the floppy drive but I’ll probably make a new flat cable so I don’t muck with the original.
Found another sleep / wake issue. After waking, the cpu speed is much slower.
before sleep cpu test from apple diagnostics reports cpu speed is 1.38 times faster than a Mac plus. After sleep / wake it reports cpu speed is 1.7 time slower than a max plus.
I first noticed everything seemed sluggish after sleep.
I noticed in this article:
In the “about the power manager” section it mentions a lot about the Mac portable and slowing the cpu down.
Not a big deal to just restart now that it’s not freezing up but curious still…
before sleep cpu test from apple diagnostics reports cpu speed is 1.38 times faster than a Mac plus. After sleep / wake it reports cpu speed is 1.7 time slower than a max plus.
I first noticed everything seemed sluggish after sleep.
I noticed in this article:
In the “about the power manager” section it mentions a lot about the Mac portable and slowing the cpu down.
Not a big deal to just restart now that it’s not freezing up but curious still…
Permanent til restart.
sleep, wake, cpu slow til restart.
I thought it was isolated to system 6 but it was a false alarm same thing happens in 7.5.3.
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Honestly I cannot reproduce this one. I am using Norton Utilities and the score (overall, CPU, video, disk, FPU(sw)) are exactly the same after a fresh start or wake up from sleep.
OK yeah mine is 100% consistent and very noticeable. I have the talking moose extension on and after wake up he sounds like a slow talking demon from hell
I’m wondering (again) if it could be related to the hybrid board I had to replace since it’s power manager related.
if it is then it’s SuperSVGA’s problem again 
Also I tried multiple systems. I booted off of a bare bones System 6.0.8 install disk and it still does it.
So I need someone with a third party hybrid board (mine is @SuperSVGA’s) to confirm it is not happening so I know it is isolated to my board only. I could try @Androda’s hybrid board as well to rule it out since it’s socketed it would be an easy swap.
Maybe one of them will chime in with some info.
*its kindof a bummer since I finally get the hard drive working and I still need to reboot anyway after waking from sleep
So I need someone with a third party hybrid board (mine is @SuperSVGA’s) to confirm it is not happening so I know it is isolated to my board only. I could try @Androda’s hybrid board as well to rule it out since it’s socketed it would be an easy swap.
Maybe one of them will chime in with some info.
*its kindof a bummer since I finally get the hard drive working and I still need to reboot anyway after waking from sleep
The hybrid module is probably not at fault here. The hybrid sends a signal to the power manager chip which indicates battery level. And the power manager chip sends a signal to the hybrid to tell it whether -5 volts should be generated or not. If that battery level signal droops too low your system will pop up a message saying something to the effect of "your battery is the weakest link, goodbye" and then the OS shuts down.
If main 5v rail regulation had failed on the hybrid, it's not likely that your system would be working at all.
CPU clock frequency comes from U10D, the "CPU Glue" logic chip. If the clock frequency is wrong, something might be up with the CPU Glue chip, the CPU Glue oscillator, or the "5/0" power rail (which powers both the CPU and clock oscillator). Check voltage on Q11's pin 2 (the big tab) near the CPU.
If main 5v rail regulation had failed on the hybrid, it's not likely that your system would be working at all.
CPU clock frequency comes from U10D, the "CPU Glue" logic chip. If the clock frequency is wrong, something might be up with the CPU Glue chip, the CPU Glue oscillator, or the "5/0" power rail (which powers both the CPU and clock oscillator). Check voltage on Q11's pin 2 (the big tab) near the CPU.
Good to know. Ok I’ll check it. I’ll have to take the machine apart again when I have time. I'm looking at the schematics and see that Q11 goes to Sys_Pwr on U15H. What is that? It's hard to tell which chip it is on the board. I guess it is the VIA.
My guess is the CPU glue oscillator is fine since everything works perfectly until it sleeps and then wakes up. Ive tested the charging/discarge and alert dialogs that pop up as the battery gets low and runs on reserve power all the way to the "goodbye" message. I get about 7 hours of runtime on a charge. So something (assuming the power manager) seems to be deliberately putting the clock in "low power" mode and then never coming out of it.