Apple IIgs Disk drive issues...

[abbub]

More fun with the Apple IIgs. I'm trying to get four drives working with my IIgs. A friend of mine lent me a bunch of 3.5" drives, and I've got two 5.25" drives. No matter which of the 3.5" drives I use, I can never see the second 3.5" drive. Even if I leave the 5.25" drives disconnected, I still only get one 3.5" drive. It doesn't matter which drive is plugged into the computer, the first drive is always seen, the second never is. Am I missing something obvious?

 

[Nathan]

I assume you have at least two disk controller cards. If so, why not just use one 3.5" and one 5.25" per card?

 

[abbub]

The disk controllers are integrated on the IIGS. My understanding is that you can just daisy chain two 3.5" and two 5.25" drives to the floppy port and you should be able to see them all.

 

[Anonymous Freak]

I have one 5.25 + two 3.5 drives on my IIgs. Works just fine.

 

[david__schmidt]

I'm trying to get four drives working with my IIgs. A friend of mine lent me a bunch of 3.5" drives, and I've got two 5.25" drives. No matter which of the 3.5" drives I use, I can never see the second 3.5" drive.

You do need to have the 5.25" disks at the end of the chain, but you say you've tried just chaining the 3.5" drives together with no 5.25" drives at all. Hmmm. That should work. What are the model numbers of the 3.5" drives?

References here:

http://www.vintagemacworld.com/drives.html

 

[ppuskari]

Well, I've run 2+2 configuration for years now. I know it works. Depending on which 3.5 drive is first in the chain though, it could be you blew something on the pass through board.

I've seen that exactly once though and it was when I plugged an AE 3.5" pass through board upside down by accident, then after that no matter what I chained to it, there was no more chain.... Albeit I doubt you opened your drive case and fiddled with it yet right?

If you are using the standard 800K Apple 3.5" drives you should be fine with the standard Apple 5.25" Unidisk or or Unidisk Platinum drives daisy chained with them.

Not sure what else.

 

[abbub]

If the pass through board were blown, would I still see the 5.25" drives that are also chained to it? Also, I've tried multiple 3.5" drives in the first position and haven't seen the 2nd 3.5" drive no matter which drive was plugged in first. Is it possible that something inside the IIgs is blown?

 

[barana]

Possible the iwm chip is blown. Partially. Check ur cdev settings. What rom version is it ? Is one of the 3.5 drives a unidisk ?

 

[abbub]

Neither of the drives were unidrives. All standard Apple 800k A9M0106 drives.

Anyway, I got a ROM 01 IIgs and all four drives are working. Aside from replacing the logic board, is there any potential for fixing the floppy issue on this ROM 03? Replacing whatever chip(s) might be blown, etc?

Thanks!

 

[abbub]

All four of the drives work flawlessly with a ROM 01 system. My ROM 03 has issues, apparently.

 

[bd1308]

I've also had problems with the 2+2 format with the ROM03 too.