taskswitch - how

[thomas]

Hi.
I try to switch between tasks. I tried f.e. this:
jmp ax:0
(ax is loaded with a tss-selector)
but nasm says no. It will only work with immediate values f.e.:
jmp 8:0
How can i solve this problem?

[-KEN-]

this help? http://www.execpc.com/~geezer/osd/tasks/setjmp.c

[abc]

I think you can only use segment registers with the JMP commands, try something like this:

 PUSH AX            ;Push AX value onto stack
 POP SI               ;put the value into SI
 JMP SI:0x0000    ;Jump

[df]

jmp double [memory_address_here] etc.
or cast them onto the stack and iret/retf
etc