Sending 0377 via KL8JA

I am noticing something odd in SimH when sending a 0377 (all ones) character. It seems to be duplicating the byte. I haven't read anything regarding this behavior. I'm away from my hardware PDP-8 at the moment, so I can't confirm that this is not the behavior that I would experience on the real thing. Here's how I reproduced it: test.pal: *200 CLA OSR JMS SEND JMP 200 SEND, 0 6416 6411 JMP .-1 CLA JMP I SEND $ pdp8.ini: at ttix 2222 set ttox0 8b load test.bin br 200 d sr 0377 Run 'nc localhost 2222 | od -to1' in a terminal, then 'go 200' and repeatedly press 'c', seeing how many times it takes to generate a line of characters in 'od'. Then, 'd sr 0376' and confirm that it takes twice as many presses, indicating half as many characters being sent per TLS instruction with the latter. Can anyone else confirm this for me? Thanks, Kyle