Yes, despite what others have posted about using the pause key, I found that one must jumper the pins. I now have a permanent jumber installed. I can switch between booting Zip or Sandisk by leaving the zip disk in/out.
I have Zipslack installed on the zip. I'm having troubles getting it to go past the kernal panic. The booting howto says to use right-shift page-up to find out what device the zip shows up at, but I can't scroll. Under dos, the zip appears as A: and the sandisk as C:. So I tried the fd0 as the root device and the booting process stops right after the zip is recognized because it is looking for an non-exisitant floppy. It is reported to be emulating a scsi device (sda) so I tried every variation of 1 to 4 for x in "loadlin vmlinuz root=/dev/sdax rw" but none works.
So, now I've used dolly to write the 1A-1 midori_3 image onto the sandisk. It boots and after about ten dots the screen goes blank. Oh well, I'm getting closer at least. Anybody knows what sandisk image might work?
Peter