"I have the code ready to go in asm and I am getting ready to test the hardware."

If you have a storage 'scope, debugging is really easy - because the timing between bits in a 1-Wire transaction is totally non-critical.
Therefore, you can set a breakpoint at the end of a bit timeslot and spend as long as you like looking at the 'scope trace, examining registers, poring over your source, etc before you set the code running again for the next bit - and the DS1820 (or any othter 1-Wire device) won't care one jot!

This is also good news for "multitasking" - as it means that there are no timing restrictions on your other tasks between bit timeslots!