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So I just noticed this on a Max ntosh Portable I was troubleshooting: The SCC chip had been pushed so hard the pins on the sides are offset by 1 pin, broken traces, lifted traces and bent legs. It amazingly still works in System 6.0.8 but 7 and up freezes on boot. Any advice on how to...

Yeah was just reading the Macintosh Portable can throttle CPU speed. Wonder if disabling automatic sleep would do anything. Reference: https://mirrors.apple2.org.za/ftp.apple.asimov.net/documentation/macintosh/atp_macintoshportable.pdf

If it's related to the PDS slot mem management/limitation I'd expect degradation of performance past a 3MB ram card on a backlit Macintosh Portable. It'd be kinda weird since I don't think any of us actually have a PDS card installed. Wonder if those old PDS ram expansions had the same...

Tried playing Crystal Quest on my Macintosh Portable 5120 but it crashes. Is the any trick/version to get it to work or am I sol?

https://www.tech-insider.org/mac/research/acrobat/9204.pdf It's maybe "intentionally" designed to behave the way it dees right now based on the info above. Perhaps it's spending extra time always checking for an installed PDS card when the total ram is above 5MB on a Macintosh Portable and...

I only see that issue with the new 7MB ram card I got.

Performance my 1MB apple card After sleep: These are the cards I tested. 1MB left and 3MB right

Regarding the software installed on my Portable for the benchmarks, it's pretty much stock System 6.0.8 with just the Iomega driver extension. I did do the benchmark on 7.1 with update 3 and it was slightly slower. @Androda regarding the 7MB card performance vs the 3MB, if it's not too hard...

Mac OS 6.0.8 with my old 3MB card After sleep: Hmmm maybe the psram on 7MB is being set into a low power/low performance state during sleep and doesn't recover.

Mac OS 6.0.8 with 7MB card After sleep

I'll test out Speedometer results on my Macintosh Portable with the 7MB card installed tonight as well. If it is an issue hopefully it can be fixed with a firmware update of the FPGA.

How'd the printing of that case go? One reason I didn't go with the original Macintosh Portable battery case design for my battery adapter is because it would take a lot of support material or compromise the surface finish of one of the sides to print on an FDM printer. The main reason...

I just read this from https://lowendmac.com/1989/mac-portable/ Sounds like you might have had that issue.

Just an update about the using supercapacitors based on recent tests. It seems like using 6F or 10F supercaps is not sufficient to spin up newer SCSI hard drives with higher current draw. The original drive `CP-3045` 40MB is alright and another `IBM-H3171-S2` 160MB drive worked alright, but...

Love it! Very much in the spirit of this project.

Just curious but why both v1.1 and v1.2? v1.2 allows you to use a battery like v1.1 with the addition of the super cap stuff.

I wouldn't consider those clips marked in red as the weakest point. If it's PLA I'd be more worried about the little arms pushing down on the heatsink snapping off. Regarding installation, you're not meant to forcefully snap on the clip with no tools. You're supposed to clip on one edge of the...

Yeah HTPLA is kinda interesting. For me personally the 2x the price of PETG and ABS and the need to do the extra step post heat treating are not necessary for this application. If I needed something over 100C it would probably be the best choice for ease of printing. Carbon fiber adds even more...

Actually a quick follow up on FDM printing and why you see mostly PLA and PETG and not ABS, ASA or Nylon. It's mainly because of ease of printing. The different plastic tend to shrink more or less when they cool. If a plastic shrinks a lot then it can cause the part to curl at the edges when...

Hey JDW, Sorry for the late response. Haven't really been on the forums that much of late. My initial thoughts like you said is that PETG should be fine. Most sites quote anywhere from 70C-85C for the temperature where it will start to deform. ASA and ABS would give a big margin at the ~100C...