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Operating System Programming: Boot + Kernel??? Only EXPERTS
http://www.angelfire.com/myband/unix/os.htm Do not rejoice that ur code works. it might be a special case of an error :-( -
Fooling the disk change line
I hope ur problem arises because of 2 OSes.If u read and write via 1 OS, then caching should not be a problem. But since u r write for One OS and read from Other, the problem persists. Try to do both reads and writes via a single OS. Thats the solution. Otherwise, probablu u may need to... -
PowerPC architecture - any good links ?
Guys, Any1 aware of good web-sites for learning powerPC architecture and assembly lanugage progamming. Thanx in advance sarnath Do not rejoice that ur code works. it might be a special case of an error :-( -
What all I have to do to run C applications in 8086 system without OS
Hey, Just compile "C" code (statically along with library ). Link it using LD as a "BINARY' and relocate the code address( say 0x1000 ) appropriartely.. Now load ur C code into the empty 8086 machine at address 0x1000. Note: u need to initialize segment registers as... -
Cooperative vs. Pre-emptive multitasking (bit of a rant)
I honour ur views but i dont agree with them. Fine, All the best for ur OS adventures. ciao Sarnath Do not rejoice that ur code works. it might be a special case of an error :-( -
Cooperative vs. Pre-emptive multitasking (bit of a rant)
Hey AMKG, This is really interesting.. It is like "Monkey -> Man" and then "Man -> Monkey". Appln programs can't be expected to be innocent. If u release an OS with appln having more responsibilities, i agree everything would be fast.. But how about security... -
32-bit addressing(base and offset-problems)
That simply means that u haven't coded properly. Do not rejoice that ur code works. it might be a special case of an error :-( -
32-bit addressing(base and offset-problems)
Ekanth, I fear u have mis-understood PM address genereation Its is not like seg-offset addressing. I'll put it crisply. 1. I dont find a LGDT instruction in ur code. Thats the first problem. ( If u r using MASM in DOS, then u need to explicitly use a .386p directive. otherwise MASM wont... -
Linkin C and Assembly Files
Ok sir! Do not rejoice that ur code works. it might be a special case of an error :-( -
Linkin C and Assembly Files
Hey ekaanth, Try doing ur kernel as an ELF image. I m not sure how complicated loading would be then. But When u r an ELF, u will have lot of advantages like, u can make Page-level protection for ur code, and RODATA (read-only data) etc.. (trapping of bugs in kernel code can b done in early... -
Linkin C and Assembly Files
Ekaanth, Compiler ur C code into Binary. U can use gcc/ld which would be a very powerful tool to do all such work. Ur Entry Point in the "C" code should know about certain things. For exp, it might need to asssume that PM and paging are already setup. Ur memory map during bootup... -
kernel 16 bit or 32 bit
Hi Ekaanth, ( Tamilian ?? ) Writing a PM boot strap should b cool yaar. Let ur BootSector load 3 sectors at a time into real memory, then switch to PM swapout the memory into wherever u wanna ur kernel to load and then return back and continue with it.. If u want a code to beleive it, u... -
New to Assembly
Hey , DOnt take peter abbel.. Its not for beginners, altho he may claim so.. I think u can study a book on assemblers..( Leyland Beck's system software book.) and then get on to PeterNorton. Else Take "Art of assembly" => Thats the most fantastic i had ever seen Do not... -
Cooperative vs. Pre-emptive multitasking (bit of a rant)
An OS standard ?!?! Have u ever tried reading the POSIX ? If u dont have protection in place, any APP program can crash ur kernel. Whats the fun in doing such a kernel ? I dont really understand that part. Is it intended to be a RT-OS ? I think probably u need to read a OS text book. Jus... -
function problems when linking [nasm]
Does QBASIC prepend an "_" b4 its symbols.. ?? Try putting an "_" before NASM symbols...HEy, a minute.. u said QBASIC right..Is it not interpretted ??? If ur QBASIC code is interpretted rather than compiled, then i fear there is no way to call ur ASM routines :( Sarnath Do... -
Debug and the stack - Newbi question.
Hi, The EXE file structure of DOS has fields reserved for StackPointer. So, ur initial SP would already be loaded by the EXE file loader. Moreover the loader loads the Segment register with value of ur PSP. (Program segment prefix ). hence the observation Sarnath Do not rejoice that ur code... -
Cooperative vs. Pre-emptive multitasking (bit of a rant)
AMKG, U r right that deadlock problems can occur only in Multi-Processing systems.., where there are multiple-processors running concurrently. In a single-processor systems, INTERRUPTS are the only problem. Hence UNIX type OSes have sthg called Software Privilege levels for selectively... -
Problem with the movl instruction in x86 assembly
1. What does ESI point to ? Is it a valid pointer in ur program's address space. 2. While using inline assembly with GCC, u need to be careful about few things. For exp, the COMPILER never knows anything about the registers u r destroying. If u dont inform GCC that u r destroying a... -
NASM newbies
I think "..start" is the problem. Jus say "start:" That would do.. If this works, vote me as the TIP Master of the week.. ha ha ha... just joking.. Sarnath Do not rejoice that ur code works. it might be a special case of an error :-(
