Hi all...

I'm running an Atmel AT89C52 at 11.059Mhz and I have it wired up to a Max232, and that's pretty much it. I'm trying to get it to output "HELLO WORLD " to my computer's serial port, but something's not quite right, and it's driving me crazy.

"ougga¿Qa[gw¿¿"  -- I get this
"HELLO WORLD  "  -- I want this

Now, I figure I must have the speed (300 baud) working right, because I get the exact same text over and over again, and it's the same length as the string I'm sending, and there's a one-to-one correlation between the characters expected and the characters received. So I think there must be something else wrong with the stop/start bits or something like that. I've tried a bunch of different things, and I can't quite get it, and I didn't find the answer searching the archives.

On the computer, I'm using HyperTerminal with these settings:
300 baud 8/N/1 and no flow control and ANSI

Here's the code I'm using:

.org	0x0000

mov TMOD, #20H  ;T1 is mode2
mov TH1, #-96   ; 300 baud
mov SCON, #50H  ;8b, 1stop, 1start, REN enabled
setb TR1        ;start timer T1

clr TI     ;clear the "transmitted" bit

hello:
mov SBUF, #'H'  ;gimme an H!
acall wait      ;wait until the letter is sent
mov SBUF, #'E'
acall wait
mov SBUF, #'L'
acall wait
mov SBUF, #'L'
acall wait
mov SBUF, #'O'
acall wait
mov SBUF, #' '  ;space
acall wait
mov SBUF, #'W'
acall wait
mov SBUF, #'O'
acall wait
mov SBUF, #'R'
acall wait
mov SBUF, #'L'
acall wait
mov SBUF, #'D'
acall wait
mov SBUF, #' '  ;space
acall wait
mov SBUF, #' '  ;space
acall wait

ajmp hello  ;say it again

wait:
JNB TI, wait
clr TI
ret