I looked into PCB traces of Poker and hope this helps someone. Though, these info may include inaccuracy in particular pin numbers, 'cause counting fine pitch pins was very difficult for my eyes.
Key switch matrix
These key events were observed with xev command on Xorg/Linux.
PCB says "Fn Keyboard Rev 1.2". Column pins are active low and Row pins are input with pull-up.
R\C|7 8 9 10 15 16 23 24 25 26 27 28 36
---+----------------------------------------------------------------------------------------------------------
3 |z x c v m , . (P6) Fn (9) (8) (?) RCtrl
4 |(*1) (*2) (*3) b n (X) App (P7) (1) (PgUp) (?) RAlt (4)
5 |` (F1) (F2) 5 6 = (F8) (P4) (6) (PgDn) - (?) LCtrl
6 |1 2 3 4 7 8 9 (Left) (X) (X) 0 (*4) (F5)
43 |q w e r u i o (Right) (X) (5) p (SclLk) (Pause)
44 |Tab (CapLk) (F3) t y ] (F7) LShift (3) LWin [ (?) (7)
45 |a s d f j k l RShift Rwin (4) ; (?) (6)
46 |(Esc) (,) (F4) g h (F6) (X) (Down) (2) (0) ' LAlt (5)
( ): no real switch
(X): no key event
(?): unclear(media key?)
*1: Muhenkan
*2: Henkan-Mode
*3: Hiragana-katakana
*4: ScreenShot event?
LED pins and resistors
Esc: 13(active low), R15(1.5KOhm)
CapsLock: 17(active low), R8(1.5KOhm)
Spc, Arrows: 14(active low), R13(1.5KOhm) for 4 LEDs
DIP switch pins
Turning switch on makes line pull down to ground.
SW1: 47(input with pull-up)
SW2: 30(input with pull-up)
SW3: 1(input with pull-up)
SW4: 2(input with pull-up)