The current version of NitrOS-9 is v1.22n.
All other programs may be used as they are, and their behaviour will not change after installing NitrOS-9.
The kernel of NitrOS-9 has been written using the new capabilities of the 6309. As the 6309 is much more powerful than the 6809, NitrOS-9 is much more efficient and powerful than OS-9.
Many of the algorithms OS-9 used internally have been changed in NitrOS-9. The new algorithms execute much faster than the previous ones, but are otherwise identical in behaviour.
The graphics drivers (WindInt, Grfdrv) were also optimized for the 6309. Speed tests show that text screen updates are performed more than four times as fast under NitrOS9 as under stock OS-9. Even the 'Xmas grfdrv' patches lag far behind NitrOS9 in terms of raw graphics speed.
The latest version of NitrOS-9 speeds up the entire system by 2 to 10 times over stock OS-9. Text writes, graphics fonts, line drawing, flood filling, system call overhead, serial I/O, and pipes are much faster than all previous versions of OS-9 or NitrOS-9. The difference is so large now that as a developer, I refuse to use anything less than NitrOS-9 v1.22. Even v1.16 of NitrOS-9 is so slow as to be more comparable to a stock system than to v1.22.
These are not the only reasons to move to NitrOS9. Another advantage is that all of the bugs that existed in stock OS-9 have been found and fixed. This includes bugs that had not been discovered previously. All publicly available kernel 'fixes' and 'enhancements' are included in NitrOS9.
Many of the same features in the upgrade have been included in NitrOS-9, but they were developed independently of the upgrade. Other features in the upgrade may be added in the future.
Software support: firstname.lastname@example.org
Distributor support: email@example.com
With NitrOS-9, you find a level of support that was never possible with OS-9. Any software problems should be relayed to Software Support. You will be contacted about the problem, and a fix will be shipped as soon as possible.
NitrOS-9 pushes the hardware of the Color Computer much closer to its limit that did OS-9, or DECB. It is very important that the installation procedure is followed carefully and exactly in order to have a complete and therefore stable system.
No hardware modifications other than installing the 6309 (any rating B, C) are required.
If you have an OS-9 module and there is no NitrOS-9 equivalent, contact the distributor, and one will be shipped to you as soon as possible. After more than two years of shipping, however, we believe there are few, if any modules that do not have NitrOS-9 equivalents.
Once NitrOS-9 is installed, you may want to reformat your disks with a smaller interleave factor. NitrOS-9 can handle much higher data rates than OS-9.
Most authors appear to be continuing to be writing mainly 6809 software. This ensures that their software will run on ALL OS-9 LII platforms, although their software will run much faster under NitrOS-9.
NitrOS-9, therefore, benefits you the most. No one else has to be aware that you are running it, and you can buy any OS-9 software in the confidence that it will work on your NitrOS-9 system.
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