Anyone ever use a Jeteye IR with a PIC?

A surplus store in our city is selling the "Jeteye PC" device for $1.

It appears to be a rs232 IR sender/receiver in a cute small package. I
cracked it open and found 3 SMD chips, a crystal and a 2 bulb IR device
(plus a few caps and transistors).

I looked up the chips with an online data *** service. One of the chips is
a 8 pin low dropout regulator.

The other 2 have me stumped:
(1) 7001 90B823
(2) TI 84D13RK LV00

Ideally I would figure out where to tap the TTL levels so I could directly
attach it to a PIC.

Has anyone played with these things?




----- some more info I found; plus I metered the ports ------

The baud rate is selected by the DTR and RTS serial lines according to
the following:

Baud Rate DTR - Pin 4 RTS - Pin 7
9600 0 1
19200 1 0
115200 1 1

After changing DTR and/or RTS to change the baud rate, allow 0.5
microseconds for the JetEye to stabilize before sending or receiving
data.

Do not select DTR=0 RTS=0, since this will power down the JetEye if it
is running with no transformer. The JetEye needs 100 milliseconds on
power up to stabilize.

Signal Assignments:
DCD - 1 - Not Used
Rx - 2 - Data transmitted from JetEye to PC
Tx - 3 - Data transmitted from PC to JetEye
DTR - 4 - Supplies power to the JetEye
GND - 5 - Signal Ground
DSR - 6 - Not Used
RTS - 7 - Supplies power to the JetEye
CTS - 8 - Not Used
RI - 9 - Not Used

The JetEye supports only half-duplex operation. This is a characteristic
of infrared.


----

push on connector on the board

246
135

pins to db9

1=db5 (ground)
2=db4 (DTR - power)
3=db8 (CTS)
4=db3 (pc to jeteye)
5=db7 (RTS - power)
6=db2 (jeteye to pc)




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