Re: Sirius RAM on ROM 3 IIgs...Sirius missing from Alltech web!

[dempson@actrix.gen.nz (David Empson)]

Supertimer <supertimer@aol.com> wrote:

> Rubywand <rubywand@swbell.net> wrote:
> 
> >     Can you use, say, an 800k /Ram5 RAM disk if you do not boot System
> >6.0.1? Like, can you just boot a ProDOS diskette and have access to
> >/Ram5?
> 
> Based on what I've read and seen, System 6.0.1 patches something from
> the ROM 3 when it is loaded.  What happens is that the computer boots
> System 6.0.1, the patch is applied, and then System 6.0.1 forces a reboot.
> This time, with the new code in place, the /Ram5 shows up.

Doesn't even need a patch.  The only problem is that the ROM 3 firmware
doesn't try to create a RAM disk if the machine has 8 MB of RAM.

The System 6.0.1 ProDOS file (GS/OS boot loaader) detects this problem,
looks up the Control Panel settings and creates the RAM disk itself
(probably by calling the same routine the firwmare should have used).

Once the RAM disk is created, you don't need GS/OS any more - the RAM
disk will be available until it gets wiped by a cold start (generally by
using the resize option in the Control Panel, power off, or self test).

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand