I will post a screenshot later when I am back home.
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Macintosh Plus odds and ends
- Thread starter t2jd1967
- Start date
I will post a screenshot later when I am back home.
Snial
Well-known member
Assuming these microdrive cartridges contain some data you might want (i.e. aren't blank); then if you send me the microdrives and if you don't mind, I can pop them in my QL and see if they're readable. I won't look at the contents, but then I can zip it all up and you can run a QL emulator to read it properly. If you send me a direct message (envelope, to the right of your username); I'll send you my address.
-cheers from Julz
cheesestraws
Well-known member
The Startup Disk control panel doesn't write anything to disk at all, AFAIK: it writes a byte to the PRAM telling it what SCSI ID to boot from. So it won't work - or certainly won't work reliably - if you don't have a PRAM battery installed. I don't know of anything that the BlueSCSI does that would prevent that from working, but the BlueSCSI product does have a generally low standard of engineering quality, so I wouldn't be surprised.
Wow, that would be wonderful. I will dig out what I have and am really keen to see what is on them. Will get back to you sometime this week. There is nothing on there that is personal except for my poor coding, so feel free to have a peek.
I have the 4.5 Volt battery installed (using an adapter) and the clock is working between powering off and on so I assume that part is working. There may be some BlueSCSI setting that I am ignoring, so will have a look there.
I pulled the case apart before I left home this morning and made the photo. I think it is clear that the grove has eroded to the point that it won't fasten properly anymore. I wonder if applying some glue before screwing it back together next time would rethread it? Using epoxy glue or something like that? Anywhere it is back together now and obviously there is no mechanical load on the case, it all fits rather snugly.
For those of you who may be interested, these is my handiwork on the diode mod. You can see that I have no bench, so working off the floor.
cheesestraws
Well-known member
Yup, if the clock is working you should be fine...
Tried it on both 7.5.5 and 7.1 and got the same response.
System 7.5.5.
System 7.1.
Weird, huh? I must be missing something really simple here.
Phipli
Well-known member
Very strange. That OS was used on a Mac Classic, which is almost identical to an SE. And I've been using Startup Disk on it.
That isn't normal behaviour.
cheesestraws
Well-known member
but this is a Plus, not an SE, and it is normal. Here it is on an emulated Plus:
I thought the new pram stuff came in with the Plus, but it might have been the SE.
Phipli
Well-known member
Oops. I did know the SE had the expanded PRAM... But forgot it wasn't an SE. Someone else was talking about SEs
I found this article through Wikipedia and it states that the Mac Plus will simply boot according to the SCSI IDs with the highest number first. That is also my experience booting off the BlueSCSI SD card. There is probably a trick there with removing "system" from a higher numbered drive, but that seems cumbersome.Oops. I did know the SE had the expanded PRAM... But forgot it wasn't an SE. Someone else was talking about SEs
Use two hard drives, one for each OS - they're certainly cheap enough these days. Use the Startup Disk control panel to choose which system you'll boot from. (Exception: The Mac Plus loads the first system it finds in this order SCSI ID 6, 5, 4, 3, 2, 1, 0.)
The Compact Mac Trio: System 6 or System 7?
The Compact Mac Trio: System 6 or System 7?, Dan Knight, The Old Gray Mac, 2001.08.01. Weighing the pros and cons of System 6 vs. System 7 on the Mac Plus, SE, and Classic.
Phipli
Well-known member
Yeah, your best bet is to put both System Folders on the same disk (with different names) and use System Picker that LaPorta linked.I found this article through Wikipedia and it states that the Mac Plus will simply boot according to the SCSI IDs with the highest number first. That is also my experience booting off the BlueSCSI SD card. There is probably a trick there with removing "system" from a higher numbered drive, but that seems cumbersome.
Use two hard drives, one for each OS - they're certainly cheap enough these days. Use the Startup Disk control panel to choose which system you'll boot from. (Exception: The Mac Plus loads the first system it finds in this order SCSI ID 6, 5, 4, 3, 2, 1, 0.)
The Compact Mac Trio: System 6 or System 7?
The Compact Mac Trio: System 6 or System 7?, Dan Knight, The Old Gray Mac, 2001.08.01. Weighing the pros and cons of System 6 vs. System 7 on the Mac Plus, SE, and Classic.lowendmac.com
System Picker is as easy to use as Startup Disk, the reason it isn't a default recommendation is that a small amount of software gets confused if you rename the System Folder, and sometimes having multiple Systems on one partition gets things muddled and a computer won't boot... But that is infrequent.
