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Recent content by cboxgo
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low-level os-independent disk access
Prattaratt, Here's a link to Ralf's Interrupts: http://www.cs.cmu.edu/~ralf/files.html -
Writing Interrupts for Disk access?
Has anyone here written interrupts for disk access in their own operating system(s)? I'm trying to get a better understanding of positioning data on a hard disk without existing operating system or BIOS interrupts. I'm also trying to learn more about advantages/disadvantages using writing by... -
Any Genius (Guru) out there?Making an OS? Protected mode? Boot sector?
Hello Sarnath, I saw the AmkG's entry and I thought I had typed mine incorrectly. It was correct the first time 0000:07C00h. Thanks! -
High Level language not suitable for writing hardware device driver???
AmkG, can you not do inport/output operations with inline assembly? -
Software Interrupts
Does anyone have sample code for loading the Interrupt Descriptor Table? I would be very interested in seeing that. -
Any Genius (Guru) out there?Making an OS? Protected mode? Boot sector?
I should correct myself. I typed 0000:07C00h but I should have typed 007c:0000h. -
Why doesn't "if" work with NASM
You can use a High-Level flow Directive in MASM. It would look something like this: .IF(AL<10) add al,1 .ELSEIF(AL<16) add al,2 .ELSE mov al,3 .ENDIF This won't work with NASM as far as I'm aware. You would have to do some form of a JUMP instruction based on a CMP instruction. That... -
Any Genius (Guru) out there?Making an OS? Protected mode? Boot sector?
1) How do I make a boot sector? ^Once your kernel is written, you can use the following command to write it out to a floppy to boot from: debug <filename> - w 100 0 0 1 - q ^However, your assembly code would determine where in memory it executes. To become the kernel, it would have to move...
