[Coco] Re: Nitros9 3.02.02 problem

[Robert Gault]

Charlie wrote:

> Thanks for the reply! Can you explain to me exactly how to "patch" RBF? I'm

> using the 6809L2 and would be booting from the Nitros9 disk as downloaded

> from Nitros9.org

> 

> Thanks

> Charlie

> 

> 

> "Boisy G. Pitre" <boisy at boisypitre.com> wrote in

> message news:EE8B8F14-DC52-11D8-AAA3-0003939F08E6 at boisypitre.com...

> 

>>Charlie,

>>

>>This is the result of a bug in RBF that was introduced in 3.2.2.  I

>>posted a fix a couple of days ago to the list...

>>

>>

>>>debug

>>>L RBF

>>>. .+795  (that is period space period+795)

>>>=21

>>>Q


The sequence that Boisy gave is the method for making the patch. Debug 
is a program which comes with the package. The command sequence is
debug
L RBF                 which links to the rbf module
. .+7C5               moves forward $7C5 bytes to the byte needing change
=21                   indicates to change the value to 21
Q                     leaves Debug

This leaves you with a patched rbf in memory but with a bad crc. Boisy 
forgot to mention you must now save this change to make things permanent.

cobbler /d0             if that is the boot drive
dEd /d0/os9boot         dEd is on your disk
L rbf                   tell ded to link to the rbf module
V                       verify the module
Q                       leave dEd

Your change is now permanent and rbf has a good crc value.

There is a slightly shorter route if you use modpatch to make the byte 
change because modpatch contains a verify command.