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I'd like to point a couple of things: 1) bbraun, another BIG THANK YOU for your effort making these small but very interesting pieces of code. They're very helpful, even without reaching total success. 2) I'm... errr... an idiot :I The via (inter-layer connection, not the 6522 VIA) I was...

I don't think so... the IIsi is as every bit as soft-power as the IIci. Despite the different form factors, their PSUs have the same connector! You can use a IIcx/ci/vx, Quadra 700/650 or PowerMac 7100 PSU to power a IIsi -- on the bench, that is: But instead of the discrete start-up circuit...

Since I'd like to keep the hardware minimally modified, your idea of using a system extension in order to enable the soft-power VIA bit is more than adequate and I have to say a BIG THANK YOU!!! Now, here come the bad news: it doesn't work on the SE/30 :( I tried first the "universal" second...

I'm not much into the microcontroller scene, but I think it would be overkill here. I'm already resarching about this, and in order to power up something from the ADB keyboard, I would use a flip-flop chip instead -- cheap, simple (even with a few more pins :p ) and no programming required...

Now that you mentioned the Radius Color Pivot IIsi... I got one of these, without the external connector. According to my probing with the 'scope, the 15-pin header on it matches Apple's DA-15 socket, as commonly numbered -- at least, grounds are where they should and so are the sync signals...

Many thanks to all for your help. But now I think it was all termination issues or some other sort of SCSI-voodoo... I have checked again the disks on my recently acquired LC 475 (by the way, what a nice, snappy, tiny, versatile, underrated machine it is!) with the very same patched Drive...

Hi all. Got a decent deal on these two HDs. They arrived physically well, but with marginal packing :( Anyway, I formatted them (not low-level) using the patched version of Drive Setup 1.5 -- I did it first on the SE/30 running 7.5.5. Aware of the problems of large volumes with older Macs, I...

It's been a while, but here's some news: it's not the SCSI chip, but one broken connection! ;)

An update... since I had the SE/30 taken apart while researching for another project, I decided to check the SCSI chip connections according to the drawing I made -- this is my SCSI-less SE/30, and I want to get it in full working order, as you may deduct from my previous posts. Guess what...

I've been thinking about this for a long time... my idea is to keep the SE/30 (or any other Mac without soft-power) permanently switched on, but plugged into an external switching box, which would be little more than a relay, a flip-flop and a tiny PSU for them. This box needs two control lines...

The IIfx is a tempting machine... however, the special 64-pin SIMMs could be a problem. About the FD, I believe the 7100 uses the manual inject drive, while the IIfx takes the older auto inject. It may work, but probably the case design will prevent inserting the floppies all the way. The...

Many thanks for all of your advice! Besides the 53C80 replacement, I have in mind several (read: too many ;) ) projects that would definitely benefit from SMD technology, thus it's worth investing in a heat gun and then some experience...

This is getting interesting... ;) Back to the original question, I've done some experimenting: In my SE/30 with Apple-branded CD 300e I put any bootable CD (I used MacOS 8.6 install), wait for it to spin up, then insert a System 7.0.1 floppy (with no CD/SCSI extensions whatsoever) and power...

24, you said? In my experience, there's no way to have that precise amount of RAM in the SE/30 -- it's either 20 or 32, the nearest available one. I assume you used a 16+8 configuration: four 4M SIMMs plus four 2M SIMMs. But the latter SIMM size is not supported by the SE/30's memory controller...

I think HD SC setup won't work with drives over 2 GB, and yours may be a tad over that size -- the "1 GB" drive that came with my 7500 was actually 1080 MB. It's strange you can't boot 7.5 all the way... but if you can boot on 7.5.5, try the patched version of Drive Setup 1.5, it's what I...

As far as I know, bootable CDs have the SCSI driver on a hidden partition, thus you don't need to have a Hard Disk with a suitable CD driver -- but it will be needed if no disk is in the CD drive. Upon startup, the SCSI-manager in ROM asks every device in the SCSI chain for a driver. If such...

Obviously, with 8 MB of physical RAM, there's no way to address anything over 8 MB, even with 32-bit addressing... with Virtual Memory enabled, you can't go over 11 MB with 24-bit addressing; while 32-bit allows up to 1 GB, HD space permitting -- just checked in my (clean, 6 MB) Colour Classic...

I think those 63x-62xx have a 6-pin header on the PSU (apart from the Molex-MiniFit-Jr Power connector) for some kind of communication with the mobo, in order to power up... So, I'm afraid further research is needed for successfully powering a 630 from a "generic" PSU. I believe that's why I...

Congratulations! Now, I have to get the guts for replacing the SCSI chip in one of my SE/30s... :-/

In my experience, any System between 7.0 and 7.5.5 would boot fine in either clean or dirty ROMs. I do it frequently on the IIx, which uses the very same ROM as the SE/30. Tried an SE/30 with clean ROM, too. You don't need to reinstall or ResEdit anything. With a clean ROM, you don't need...