[Coco] OS-9 RAM disk with "rdisk" command? And /md descriptor?

[Allen Huffman]

I cannot remember where I got the OS-9 RAM disk I use, but it was by far my favorite of all the ones I tried over the years. It came with a command called “rdisk” that let you dynamically create the RAM disk as any size you wanted, rather than having descriptors set to different sizes.

It looked like this:

Error - Use Rdisk [‘name’] [/device] [size in blocks] [action]
        where action = T to terminate or R to recover

I used it all the time to create a big RAM disk when I needed it, else small ones, without changing bootfiles.

Looking at my old NitrOS-9 boots, circa 1996, the driver inside is called “Rammer”:

Size: $0115 #277
CRC: $3AB3AA

The one included with NitrOS-9 today is also called Rammer, but it does not seem to honor the Rdisk utility. I plan to pull my old one out and use it, but wondered if anyone remembered what this was.

Also, I note in my bootfile that a second descriptor called “MD” was in there using Rammer, but it was slightly smaller.

R0 = 47 bytes
MD = 33 bytes

I have zero recollection of what /md was for.

		— A