GPS clock timing !

[skimask]

I'd like to build a small Clock with GPS time-sync, look, I'm using the Darrel instant interrups to drive the Timer 1 clock, it works great ! (Thanks Darrel !), but when I tried to read the GPS data (over Pin RB1) there is a lot of missed/corrupted bytes in my buffer, something like this:

Probably the interrupts interrupting the SERIN statements. Disable the interrupts before going into SERIN, reenable after coming back.

I knew this is a time issue (software generated timing "serin2"), another plan is to use the internal UART build in my pic (i'm using a18f452), but my GPS only outputs TTL levels this create interfacing problems, how can I get working this project?

Normal, Inverted RS232, the PICs capabilities, all discussed fairly well in the PBP manual.