Pretec compactGPS serial mod page 2

I discoved the module was a SiRfStarI OEM unbranded module, and would only have power and serial lines on it. The device uses the NMEA protocol at 4800bps Using a meter, I worked out the configuration of the cables.
In summary: NMEA 4800bpx Serial 8N1 settings The wiring is thus: Pin 1: Serial RX Pin 2: Serial TX Pin 3: 3.3V Doesnt change? Pin 4: N/C Not connected Pin 5: GND Ground Line Pin 6: 3.3V Positive supply
Using the scope, I worked out that it was running 3.3v serial line 4800bps 8N1 port settings. So what would be needed to turn this into a serial device? A serial 3.3v to RS232 converter a 3.3v Regulator Looking through some datasheets I finally decided on the MAX3232CPE and the MAX604ECAE

Go on to my chip selections