Atmel AVR to 1 wire bus

Here is some C for the Atmel AT90S8515 microcontroller written with AVR GCC. It is a general purpose Dallas 1 wire bus interface that you control via RS232. It doesn't program EPROMS (no 12V drive) but maybe I'll add that later. I use AVR Dude to talk to my micro, as well as AVR libc (handy stuff like printf..). I'll put up the schematic I used up, but it's pretty basic.
The code produces output like the following 
===============
Inited!

> sr
10:5a:cf:4e:00:08:00:d4
09:42:81:85:03:00:00:6d
> te 10:5a:cf:4e:00:08:00:d4
temperature 25.0
> rs
Resetting... Presence
> rb
Read a 0xff
> wr 0
Wrote a 0
> re
Read a 1
> ?
rs               Reset and check for presence
re               Read a bit
rb               Read a byte
wr bit           Write a bit
wb byte          Write a byte (hex)
wc cmd [ROMID]   Write command
te ROMID         Read the temperature from a DS1820
>

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