car@trux.UUCP (Chris Rende) (12/19/89)
Summary: Request for information regarding the similtaneous use of 2 hard
disk controllers with 4 hard disks on an XT clone. One controller
and 2 hard disks for DOS - another controller and 2 hard disks for
Minix.
I have a XT clone, MS-DOS 3.2, Minix 1.2 and the following HD configurations:
HD set #1 (DOS): OMTI 5510 HD ctrl, (2) ST-213 10Mb hard disks
HD set #2 (Minix): OMTI 5520 HD ctrl, (1) ST-213 10Mb disk, (1) ST-412 10Mb disk
When I want to run DOS, I plug in the HD controller for HD set #1.
When I want to run Minix, I plug in the HD controller for HD set #2.
Problem: I don't want to keep swapping controllers.
Ray of hope: My HD manual says that the controller's port base can be changed
from 320 to 324, 328, etc.... And that the BIOS ROM can be changed from
C800 to CA00.
Can I change the 2nd controller to use 324 and CA00 and install it?
Will DOS leave the second one alone? (Especially since the disks on
the 2nd controller won't be DOS disks).
Of course I'll have to change the Minix HD driver to use the new base of 324.
Since only one controller will be active for the particular OS, there
shouldn't be any problems with DRQ3 being shared... right? (Each OS would
know how to talk to the appropriate controller when necessary).
car.
--
Christopher A. Rende Central Cartage (Nixdorf/Pyramid/SysVR2/BSD4.3)
uunet!edsews!rphroy!trux!car Multics,DTSS,Unix,Shortwave,Scanners,StarTrek
trux!car@uunet.uu.net Minix 1.2,PC/XT,Mac+,TRS-80 Model I,1802 ELF
"I don't ever remember forgetting anything." - Chris Rende