uC board connector:

1   Vdd
2   Vss
3   col 0
4   col 1
5   col 2
6   row 0
7   row 1
8   row 2
9   row 3
10  row 4
11  uC nRESET  
12  uC IO     5
13  uC nINT  and pin 17 (D13 on PXA BTTXD / GPIO43)
14  uC IO     25  (BTRXD on PXA (B13)
15  uC IO     15
16  uC IO     6
17  uC IO     7
18  uC IO     24
19  speaker
20  speaker
21  connect to 28 via 3 pin thing.
22  uC IO     23                        Charge indication
23  AC connected (M12 on PXA)
24  To 100k resistor fed from diode on power sw.
25  power sw pin
26  diode fed from power switch
27  3 pin device. connected also via this to pin 24
28  see 21
29,31,33,35 +Ve input from AC connector
30,32,34,36 Vss

keyswitch matrix:
   4  5  3
6  s2 s4 d1
7  su s3 d3
8  s5 rs d2
9  sd    d4
10 sm    d5

on the mainboard:
pin 24 and 28 go to two 6 pin ICs adjacent to the flash