Modules/ATA - Debugging issue with VBox, problem still there

[tpg/acess2.git] / Kernel / arch / x86 / desctab.asm

diff --git a/Kernel/arch/x86/desctab.asm b/Kernel/arch/x86/desctab.asm
index 4223e6f..f6cc14e 100644 (file)
--- a/Kernel/arch/x86/desctab.asm
+++ b/Kernel/arch/x86/desctab.asm
@@ -54,6 +54,8 @@ Desctab_Install:
 .pl0code:
 
        ; Set up IDT
+       ; Helper Macros
+       ; - Set an IDT entry to an ISR
 %macro SETISR  1
        mov eax, Isr%1
        mov     WORD [gIDT + %1*8], ax
@@ -64,23 +66,28 @@ Desctab_Install:
        or ax, 0x8000
        mov     WORD [gIDT + %1*8 + 4], ax
 %endmacro
+       ; Enable user calling of an ISR
 %macro SET_USER        1
        or WORD [gIDT + %1*8 + 4], 0x6000
 %endmacro
+       ; Set an ISR as a trap (leaves interrupts enabled when invoked)
 %macro SET_TRAP        1
        or WORD [gIDT + %1*8 + 4], 0x0100
 %endmacro
 
+       ; Error handlers
        %assign i       0
        %rep 32
        SETISR  i
        %assign i i+1
        %endrep
        
+       ; User Syscall
        SETISR  0xAC
        SET_USER        0xAC
        SET_TRAP        0xAC    ; Interruptable
        
+       ; MP ISRs
        %if USE_MP
        SETISR  0xEE    ; 0xEE Timer
        SETISR  0xEF    ; 0xEF Spurious Interrupt