RE: [MI400] tags active/inactive?

[Dave McKenzie <davemck@xxxxxxxxxxxxx>]

I would guess it displays addresses used by AIX or Linux running in a
partition, since they use "tags inactive" mode, but I don't have access
to a machine running AIX or Linux to see.

Address translation in tags inactive is different from tags active: it
uses a 9-nibble segment ID, a 4-nibble page ID and a 3-nibble byte ID.
It's described in Frank Soltis' books:

Pg 167 of "Fortress Rochester":

http://www.iseriesnetwork.com/str/books/Uniquebook2.cfm?NextBook=188


or Pg 212 of "Inside the AS/400," 2nd ed:

http://www.iseriesnetwork.com/str/books/Uniquebook2.cfm?NextBook=118


BTW, nice lowercase hack.  Now the $64,000 question: how did you figure
it out?

--Dave


On Wed, 2005-16-02 at 09:03:21, Gene_Gaunt wrote:
> I noticed "F10=Tags inactive" changes the 8-byte starting address
> input 
> field combination from a 10-and-6 nibble combination to a 9-and-7 nibble
> combination.  Hmm, what does a 9-and-7 nibble combination, instead of a
> 10-and-6 nibble combination, signify for an 8-byte address, when tags are
> inactive?
>
> I noticed that trying to enter a perfectly valid 10-and-6 object header
> address combination into these 9-and-7 input fields results in the error
> line message, "80 exception, segment does not exist."
>
> By the way, here is a way to change System Service Tools' "Display/Alter
> Storage" so that lowercase letters appear in the "eyecatcher" right-hand
> column area:
>
> ==> Start System Service Tools
> ==> 1. Start a service tool
> ==> 4. Display/Alter/Dump
> ==> 1. Display/Alter storage
> ==> 3. LIC module
> ==> 1. Find LIC module by name
> ==> enter module name:  S3FLAGS
> ==> press "F10=Display Data"
> ==> 1. Hexadecimal, alter capable
>
> In other words, navigate to the data portion of SLIC module "S3FLAGS".
>
> Counting the first data byte here as byte ONE, the fourth data byte
> pertains to Display, and the fifth data byte pertains to Print.  Values for
> Display and Print are:
>
> x'01' = do not display lowercase letters
> x'02' = fold lowercase letters into uppercase letters
> x'03' = display lowercase letters
>
> On my V4R5 machine, the S3FLAGS module's fourth and fifth data bytes were
> x'01' and x'01'.  I changed them to x'03' and x'03', pressed "F11=Alter
> storage", and wow, the "Display/Alter Storage" immediately started
> displaying lowercase letters