Search results

  • Board Nominations
    Nominations have now closed and the results are available here.
  • Hey Guest, MARCHintosh 2026 is upon us. Check out community projects, join GlobalTalk, and have fun!
  1. Sideburn

    BlueSCSI on Macintosh Portable

    Awesome. I’m curious how / what is going on…
  2. Sideburn

    BlueSCSI on Macintosh Portable

    So to sum up this thread: • BlueSCSI needs external power from floppy cable in order to wake it up after sleep. • RAM expansion cuts CPU speed in half and then chops that speed in half again after sleep. * could still be isolated case to a defect in my board. Won’t know for sure until someone...
  3. Sideburn

    BlueSCSI on Macintosh Portable

    I found the culprit! It's the 7MB RAM expansion. I pulled the card out and bam! my machine was running at full speed (even faster than yours at 2.154) before and after sleep. Both issues fixed with RAM card removed.
  4. Sideburn

    BlueSCSI on Macintosh Portable

    So do I. Max performace. I just tried system 7. Same results. I get faster graphics and HD speed than yours but your cpu and math are faster…
  5. Sideburn

    BlueSCSI on Macintosh Portable

    Wierd. A lot better. Your cpu shows 2.1. I ran the cpu test only. You are also running system 7 which slows things down and I was on system 6. 🤔
  6. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    I don’t even have a display or anything hooked up. Not even a speaker. I’m only trying to get anything other than a clock right now. Some square waves off the roms mpu etc. For that I shouldn’t need any RAM installed right?
  7. Sideburn

    BlueSCSI on Macintosh Portable

    Right. Like a lipo. I assume when the portable does its final shutdown the battery will not be lower than 50%. I’ll check it next time.
  8. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    I don’t need to have the memory sims installed either in order for the system to run correct?
  9. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    Right. I figured it wouldn’t affect the system as a whole. I ordered some crystals. I know it’s a resonator and not an oscillator. The ones I ordered call them both but I’m pretty sure it’s just a crystal. There was a broken trace but after I fixed it it still wasn’t oscillating. This is what I...
  10. Sideburn

    BlueSCSI on Macintosh Portable

    Oh wow I didn’t realize you can’t fully discharge the lead acids. Yikes I probably came close a couple times when I was testing it.
  11. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    OK Here are my new findings: For starters I have no oscillation on Y4 or at Um5 pin 2 and 3 as well. they are sitting at 2.4v Not sure if this is important or not. Is this just the realtime clock or is it part of the VIA chips and are they required to get the MPU running? On the MPU: Reset...
  12. Sideburn

    BlueSCSI on Macintosh Portable

    Heres some speed test results before sleep and after using Speedometer 3.23 (not sure what units those numbers are in but quite a difference): 1.252 before sleep. 0.551 after sleep. So after sleep the CPU is running at about 50%
  13. Sideburn

    BlueSCSI on Macintosh Portable

    I have a 6V 5Ah Lead Acid: https://www.amazon.com/gp/product/B00MYL8OQU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Got some copper sheet and made a 3d printed repro :) I get 7 hours just running the After Dark screensaver all day as a test. And thats skipping through all of the battery...
  14. Sideburn

    BlueSCSI on Macintosh Portable

    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...
  15. Sideburn

    BlueSCSI on Macintosh Portable

    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.
  16. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    yeah, I checked the oscillators Y1, Y2, Y3, And Y4 and click on the 68030, 6882, UF11, UG11 and UG13. I will check the gluechip. Not sure what the mdu, rbv, and e clock are. Been hunting down and patching broken traces as well. I found a couple more by the scsi chip and external scsi port but...
  17. Sideburn

    BlueSCSI on Macintosh Portable

    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...
  18. Sideburn

    BlueSCSI on Macintosh Portable

    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...
  19. Sideburn

    Any IICX chip level repair experts? I've got a clock but RESET / ARST is stuck high

    I realized that lol 🤦‍♂️ I made the mistake of trusting ChatGPT out of laziness instead of confirming. From 68030 reference. it’s seems to vary sometimes no? Anyway, now that I know it’s not RESET, I need to figure out what the key areas are to check with the scope. Im getting nothing front he...
  20. Sideburn

    BlueSCSI on Macintosh Portable

    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.