Sorry again for the off-topic post - I've made what I think is quite a lot
of progress in as much as I can now get the asssembler compiled and
sometimes running.
However I am stuck now on implementing interrupts - specifically int 0x10.
Everytime I run this code I get a segmentation fault error. I have tracked
the problem down to the int $0x10 instruction but why is this causing a
problem ???
Any and all help gratefully received.
Ivan.
The test code as follows :
.globl main
main:
mov $0x00, %ah
mov $0x13, %al # set 320 x 200, 256K
int $0x10 # call bios
call loop
mov $0x00, %ah
mov $0x02, %al # set 80 x 25, 8 x 14 box, 16 colours
int $0x10 # call bios
ret
# loop is a simple delay function
.globl loop
loop:
mov $0x0fff, %ebx
.L2:
mov $0xffff, %eax
.L3:
sub $1, %eax
jnz .L3
sub $1, %ebx
jnz .L2
ret
