Oi! It works again! I love programming. Íî îáè÷àì Ñàøà íàé-ìíîãîòî ðàçáèðà ñå.

It's Tuesday again, first day of the week I have time for my practical work. Started at 10:00. It's now 13:00 and there is still a lot of work to do... I'm still moving the stuff to the kernel; replacing a lot of hacks with decent code. Of course now it doesn't work anymore, but it's not so bad as it was this morning. I managed to crash my Virtual Computer (that is: the program I run my operating system in crashed. Not supposed to happen.)

We just saw the first part of opera by Musorgski, Boris Godoenov. After the first 20 minutes we left, it was boring... but 20 minutes were nice :)

Today no Minix. The weather was wonderful, and we went to my grandmother in Heereveen. It was very cosy, she moved to a new appartment, beautiful. We had dinner in a good Chinese restaurant, sth like Golden Roses. Next time I'll have number 304 and Kerry Ko again ;)

In the train from Hoorn to Amsterdam we met Alrik, an old friend. In Amsterdam we had to run for the intercity to Duivendrecht; the lady said we didn't have to pay (she didn't know how to handle our strippenkaart). Had great fun: we were sitting to 2 south-Dutch farmers. As Alex and I were talking Bulgarian, they though we were foreigners and I heard "...ze verstaan het toch niet..." (...they don't understand it anyway...) Couldn't keep my laughing, the two were so funny :)

Joeri, a fellow student from the VU is now doing his final project, in the States. On his website there's a cool dynamic cartoon page, with Garfield. Garfield rulez!

Trying to put the stuff in the kernel is boring and error-prone, still working on it. Lot's of .h files to be changed. The people we rent the apartment from came to see what the renovations have been.

Well, the policy is fine. No completely implemented yet, but it works for data/bss parts of processes. Now I'll have to move my temporary stuff from the memory manager to the kernel; boring but has to be done. After that I'll implement a phys_copy which handles overlap.

Yesterday afternoon I got the basic technology right, now I'm working on a policy. The goal of the exercise is: implement memory compaction. It's not extremely specific though about what is considered memory compaction, so I have to find a good policy myself. I'm now thinking about this: fetch a hole (start with first one, lowest in memory). If this is imediately followed by a process, this process should be moved (slided down), and the current hole size = hole size - proc. size. If the hole is not followed by a process (for example next to the BIOS or shadowed ROM area), see if the next thing it's followed by it a hole, and copy it (when it fits) -- no sliding thus. If copied: hole size = hole size - proc size, else hole++.

Wow! Yes yes yes, I did it -- I just moved a process in memory! How exciting! Minix 2.0.0 gives a process a part of the memory and will never move it, but I added a (debugging) system call to move a process. Currently it will just move to whatever place there is available, but I am very happy it works. It's really nice programming like this: huge glass of water, espresso, Nirvana, Minix source code book next to me, calculator (for memory address conversions), pen & paper (idem) and Minix running in a virtual computer in Windows 2000... I love programming.

Alex & I just saw Bridget Jones Diary, a wonderful romantic and funny movie. Really very nice, highly recommendable. Guusbosman.nl has been unreachable for a few hours (from 17:00 to 23:15) -- security too tight ;)