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____/ Homer on Tuesday 19 Jul 2011 17:40 : \____
> Verily I say unto thee, that Roy Schestowitz spake thusly:
>> Announcement: RapidDisk (rxdsk) 1.0b Stable release
>> ,----[ Quote ]
>>| I am writing to announce the release of my Linux RAM disk kernel
>>| module. Yes, the Linux kernel has the brd module already integrated
>>| into it, and also the zram module it the staging tree. And yes, you
>>| can instead utilize ramfs or tmpfs for RAM based file systems. But
>>| RapidDisk or rxdsk is a bit different.
> I'm still waiting for Linux to support recoverable and bootable RAM
> disks, like the Amiga:
> The AmigaOS also has support for a fixed-capacity recoverable RAM disk,
> which functions as a standard RAM disk, but can maintain its contents on
> soft restart. It is commonly called the RAD disk, and it can be used as
> a boot disk (with boot sector).
> The Amiga could do this because it could be programmed to save memory
> states between warm, cool and even /cold/ resets (power off), using
> instruction in the Exec library (the core kernel functions that lived on
> the "kickstart" ROM) that pointed to fixed memory offsets (vectors),
> called the WarmCapture, CoolCapture and ColdCapture vectors. These
> contained pointers to whatever resident instructions you assigned them,
> including boot code for a RAD disk.
> AFAICT there's nothing like that on modern PCs, although given that it's
> an ideal mechanism for virus propagation, that's probably a good thing.
> Typically, ColdCapture and friends could survive for about half a minute
> after power-off, and an indefinite number of cool (signal HALT + RESET)
> or warm (signal RESET only) reboot, thanks to capacitor charge.
> Still, I miss the 1 second boot time of an Amiga booting off a RAD disk.
> This is probably the next best thing:
The romanticism of computing will die if vicious companies
like Apple and Microsoft get their way. They increasingly deny
even access to the command prompt. As for booting, they annihilate
the process, at least in devices.
~~ Best of wishes
Dr. Roy S. Schestowitz (Ph.D. Medical Biophysics), Imaging Researcher
http://Schestowitz.com | GNU/Linux administration | PGP-Key: 0x74572E8E
Editor @ http://techrights.org & Broadcaster @ http://bytesmedia.co.uk/
GPL-licensed 3-D Othello @ http://othellomaster.com
Non-profit search engine proposal @ http://iuron.com
Contact E-mail address (direct): s at schestowitz dot com
Contact Internet phone (SIP): schestowitz@xxxxxxxxx (24/7)
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