Re: I'm looking at the files being journaled . . . .

Hi Jim

I hope what I'll say lines up with you - I borrowed a simple image from an IBM web page or presentation that puts i5/OS above the TIMI, along with user applications. SLIC or System Licensed Internal Code is just below the TIMI, and below that is the hardware technology - hardware technology does change, and SLIC (at least in the simplest terms) is the thing that is changed, while the TIMI gives us a consistent interface, so we don't need to worry about low-level changes.

You use the word "straddle", which gives me a somewhat different way to look at these components or layers.

*Regards*

*Vern Hamberg*

<cid:part1.396FUQnj.Ze0Ak2r7@centurylink.net>

On 2/7/2025 11:26 AM, Jim Oberholtzer wrote:

Additionally if one were to get really picky (as pointed out by Frank Soltis in a COMMON presentation) the OS is really the LIC which straddles the virtualization layer (TIMI) between hardware and the software just above it. IBM i is the human interface and a large group of applications that live above that.

Too deep in the weeds for most except true computer scientists.

TIMI = Technology Independent Machine Interface.


Jim Oberholtzer
Agile Technology Architects

On Feb 7, 2025, at 10:59 AM, Patrik Schindler<poc@xxxxxxxxxx> wrote:

Hello Jim,

Am 07.02.2025 um 17:09 schrieb Jim Oberholtzer<midrangel@xxxxxxxxxxxxxxxxx>:

Actually it's two steps.

LIC load (C200xxxx to C600xxxx) level would equate to IMPL
C900xxxx would imply IPL (Initial Program Load) for the IBM i system.

You are correct, they tend to get lumped together as IPL. (Just being
picky about terminology)

Thanks for explaining. I can't remember to have read the term IMPL until this very day.

:wq! PoC


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