Readme Pro2 8 button

NOTE:(6/2010) For some reason unknown (perhaps Jumper J05) The OS ROMS
(U21 and U32) did not boot (but passed diagnostics) for one person who
upgraded two units.  If you have this problem, First try changing J05.
If that does not work, try the Alternate 8 button OS roms.

Chip types 27C512-2JL
read using 27C512 in EPROM+

Chips source = David Fox
---------

Pro Eng Hi V5.32
830104-01 C2DD
U21
90 Youngchang
------------------------
Pro Eng Lo V5.32
830104-02 F0A2
U32
90 Youngchang
---------------------------
SHx8 SU HI V5.19
821227-01 A86F
U22
90 YoungChang
---------------------------
SHX8 SU LO V5.19
821227-02  3EE3  
U33
90 YoungChang
-----------------------

Alternate OS v5.32 (from an SXA unit purchased by one user)

OS Hi  v 5.32    file Alt8bu21
U21 
Check sum C47C

OS Lo  v 5.32    file Alt8bt32
U32
Check sum F234