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

[Bill Pierce]

Allen, If you look in the 'nitros9/6x09L2/modules/rbf/" folder on any distribution disk, you'll find "MyRam.dr" and "MyRam_R0_96k.dd" which are Gene Hesket's ram disk.
It will auto-init, auto-format and if you don't like the size, deiniz it, dmode the "sct" to the "sector" size you want, and "just use it"
Deiniz it, and it returns the memory back to OS9.
 

Bill Pierce
"Today is a good day... I woke up" - Ritchie Havens
 

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-----Original Message-----
From: Allen Huffman <alsplace at pobox.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Sat, Jan 31, 2015 9:57 pm
Subject: [Coco] OS-9 RAM disk with "rdisk" command? And /md descriptor?


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


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