Assembler: jmpf, testb and else instructions

Question

Help me please, i don't understand this code:

...
BUFFER = 0x0600
...
rep movs jmpf BUFFER+migrate, 0 ;???
migrate:
findactive:
testb dl,dl ; ???
jns nextdisk

Answer 1

I'm an old x86 coder. I have to admit I don't understand your code either. The "movs" instruction line looks illegal. Are you sure you've transcribed the code correctly?