Floppy Driver

[hAri]

I look for some simple implementation of floppy drivers. Is there any god
site, page with some code with tuts.

                                            Thanks

[jamethiel]

Here are a couple earlier threads on this subject with links and discussion.

http://www.osdev.org/board.jsp?message=3075
http://www.osdev.org/board.jsp?message=2862

15 minutes of google and chasing links should get you more than enough information anyway.

--jamethiel

[hArI]

Thanks. One more question. I have implement mutitasking but for all tasks i must allocate 12KB (Page dir., Page Table and virtual console). Is there any chance to minimize that.

[jamethiel]

Well, my system allocates 16 bytes per task, plus usually 160 bytes for stacks... call it 175 bytes per task. But I don't use paging, virtual consoles, pre-emptive multitasking, or anything like that.

12KB isn't a lot of memory these days. Is there a particular reason you wish to reduce this?

--Jamethiel

[hArI]

There is no good reason but I love to optimize things.
Question again: About mem determination without BIOS, something like direct
probing. I write something like this but computer crash when i go behind
my memory size (I write this in p-mode)???

[common]

Does your computer have a memory hole option turned on?  Are you performing this probe after or before paging is enabled?  Are you getting interrupts on the possible reasons?  Does your GDT set up properly?

[hArI]

U have no idea what is _memory hole_? Pging is disabled and GDT is OK (i check this 1000 times)!?!?!?!?!