Power up time

[CyberAngel]

(03-24-2020 07:04 AM)cyrille de brébisson Wrote:  Hello,

G2 boot sequence is:
- Rom in CPU boots
- Rom in CPU located flash rom, locates OS in flash (7MB) and loads said OS to ram. This takes around 3s...
- Rom in CPU starts OS
- OS displays the HP logo
- OS starts all "drivers". This includes the file system...
- File system starts... But file system has to scan some/part of the flash. This can be, unfortunately a slow operation... It can take anything from 1s to 7s!!!! These needs to be added to boot time.
- OS accesses roughly 500Kb of files (character set + all calc state files)... ~0.3s
- OS starts calculator function

Here you go, this should explain the Prime G2 boot process...

Cyrille

Nice explanation! Thank you!
What about the G1? How does it boot?
Please!

Veli Pekka