These are general things that I might need reminding of.

===============================================================================

Bochs Magic Breakpoint

-------------------------------------------------------------------------------

asm volatile ("xchgw %%bx, %%bx");

xchgw %bx, %bx

===============================================================================

GNU Assembler x86_32 CDEL

-------------------------------------------------------------------------------

The order function data is pushed onto the stack is, from bottom to top:

Last Argument,

...

Second Argument,

First Argument,

Return Address

This also applies to structs passed as arguments (the last member of the

struct is pushed first).

If a function's signature is f(int32_t a, int32_t b, int32_t c), then

- a can be accessed as 4(%esp),

- b can be accessed as 8(%esp)

- c can be accessed as 12(%esp)

%eax, %ecx, and %edx are the registers saved by the caller.

The returned value is expected to be in %eax.

===============================================================================

x86 Assembly

-------------------------------------------------------------------------------

Use pushf/popf to push/pop the flags register.

iret pops eip, cs, and eflags from the stack in that order.

===============================================================================

qemu-system-i386

-------------------------------------------------------------------------------

bus 0

device 2

function 0

VGA Controller

Vendor ID 1234

Device ID 1111

device 3

function 0

Enthernet Controller

Vendor ID 8086

Device ID 100E

device 0

function 0

PCI Host Bridge

Vendor ID 8086

Device ID 1237

device 1

function 0

PCI to ISA Bridge

Vendor ID 8086

Device ID 7000

function 1

IDE Controller

Vendor ID 8086

Device ID 7010