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Author
2020-02-23
Switched the physical memory allocator to a bitmap table. Previously,
Jake Mannens
2018-12-23
Corrected a bug in the hard-disk driver where calls to hd_read_block()
Jake Mannens
2018-10-09
Added the f_inode element to struct file as a pointer to the file's
Jake Mannens
2018-10-05
Added code to enable gate A20 during startup.
Jake Mannens
2018-09-09
Re-ordered system call numbers and definitions into alphabetical order
Jake Mannens
2018-09-01
Removed the sys_puts system call in favour of calls to tty_write().
Jake Mannens
2018-08-26
Updated the style of the code in lib/string.c to conform to the rest of
Jake Mannens
2018-08-22
Added the header file limits.h which contains one definition for
Jake Mannens
2018-08-20
Defined macros cli() and sti() in asm/interrupt.h to disable and enable
Jake Mannens
2018-08-07
Fixed a bug where the panic() function called printf() instead of
Jake Mannens
2018-08-06
Defined ssize_t in unistd.h.
Jake Mannens
2018-08-01
Defined EOF as -1 in stdio.h.
Jake Mannens
2018-07-31
Modified the scheduler so that a HLT instruction is executed if no
Jake Mannens
2018-07-30
Added a new subroutine invlpg() to asm.s which simply checks the current
Jake Mannens
2018-07-30
Fixed a bug where the tick_handler() and sigret() functions did not pass
Jake Mannens
2018-07-28
Added new function register_trap() which creates trap gate entries in
Jake Mannens
2018-07-25
Added missing prototype for puts() in stdio.h.
Jake Mannens
2018-07-25
Fixed a bug in switch_to() in which the value of EBX was not popped
Jake Mannens
2018-07-16
Included the necessary stdint.h in kernel/hd.h. That header file may now
Jake Mannens
2018-07-14
con_init() is now called during the kernel's boot sequence in kboot()
Jake Mannens
2018-07-13
Added a state field to the task structure to hold the task's run state.
Jake Mannens
2018-07-12
Task state information is no longer manually saved on context switch.
Jake Mannens
2018-07-11
Memory is now allocated for a kernel stack unique to each address space
Jake Mannens
2018-07-11
Modified the tick_handler interrupt routine in timer.s so that it no
Jake Mannens
2018-07-11
Implemented a basic scheduler using an array of task structures in which
Jake Mannens
2018-07-08
Moved the 'ticks' variable from kmain.c to timer.s.
Jake Mannens
2018-07-08
Added a printf() function to the library under stdio.c which uses the
Jake Mannens
2018-07-07
Added '-g' flag for GCC to all makefiles to ensure debugging information
Jake Mannens
2018-06-25
Added the header asm/interrupt.h which includes a prototype for the
Jake Mannens
2018-06-24
Re-structured the source tree and modified makefiles accordingly.
Jake Mannens
2018-06-24
Modified makefiles to use the more appropriate variable $(MAKE) when
Jake Mannens
2018-06-23
Re-wrote interrupt handling. Now, flush_idt only initializes IDT entries
Jake Mannens
2018-06-23
Corrected a bug in vsprintf where zeros following any digit greater than
Jake Mannens
2018-06-20
Added a very basic types.h header file that defines NULL, size_t and
Jake Mannens
2018-06-19
Added foundation code to initialize the PIT and create a 10ms jiffies
Jake Mannens
2018-06-18
Added interpretation of the '%' conversion specifier which acts as an
Jake Mannens
2018-06-17
Added zero padding and field width interpretation to vsprintf.
Jake Mannens
2018-06-17
Cleaned up console I/O functions in con.c and con.h respectively.
Jake Mannens
2018-06-17
Added basic implmementation of %x to vsprintf.
Jake Mannens
2018-06-17
Fixed a bug where if multiple %s parameters were passed to vsprintf,
Jake Mannens
2018-06-17
Added %s to vsprintf
Jake Mannens
2018-06-16
Initial commit
Jake Mannens
