PX8b 	 December 2004

8 button PX upgraded to Pro1  Chip Set 1:
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.

OS chips are 27c512-20
Sound Roms are 27C080-90
alternate Sound ROM blanks are Toshiba TC54000P-12

The first number of the file name is the chip location socket number
on the Kurzweil board

example: 56px8b goes in socket U56
the px8b part of the filename describes the source module
	(the source of the chip data.) 

The decision to use the PX8b was based on the observation that if
you have a Pro1 already you don't need the chips from the Pro1. 
You need the chips to upgrade a PX to a Pro1.  

----------------
Checksum Pro1
u21	C2DD
u22	9F2C
u32	F0A2
u33	4AD1


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

 

