touchpad, ALPS JCI-S1S, Synaptics T1002, Synaptics T1004

[legacy]

so, here it is an interesting lecture about Synaptics-t1004 based touchpad to ps/2

I have also found the following

• Synaptics T1002, Apple PowerBook G3 Wallstreet, TM1002A Rev H, 8 pin, PIC16C58 ... probably Apple Desktop Bus
• Synaptics T1002, Apple PowerBook G3 Lombard, 920-000169 Rev D, 12 pin, Synaptics M1658TQ32 ... unknown protocol (USB? I can't find information about Synaptics M1658TQ32, it's attached to Synaptics T1002)
• ALPS JCI-S1S, Fujitsu Siemens (provably also Sony/Vaio) laptop, PS/2 interface

I am looking for a touchpad, I need to directly interface it to a fpga, therefore I need something known.
ALPS JCI-S1S seems to be present on ebay, but ... I haven't found useful information, even if it has been used in an arduino project, problem with that: that guy wired the cable, no information about the PCB, and on ebay sellers don't provide exactly that same touchpad

I am opened to different approaches, methods, hacks

p.s.
I have here the Apple TM1002A used in Wallstreet laptop, but I'd rather avoid to implement Apple Desktop Bus (ADP)

p.s.2
I can't fine datasheet about Synaptics T1002, does it speaks PS/2 natively?

[legacy]

PS/2 protocol, 5V