Hi, trying to get a small GWBASIC program talking to a 452

10 OPEN "com1:19200,n,8,1,rs,cs,ds,cd" AS #1 LEN=1
20 ID$="G"
30 PRINT#1,ID$
40 IN$=INPUT$(1,1)
50 IF G$="V" THEN PRINT" - verified":

Works OK 2nd RUN, but 1st RUN always produces Device
I/O Error. I have a very old note of a statement that stops this
happening, ie comms start without error 1st time, but it's lost
on a dud floppy ;-(  It wasn't anything to do with ON COM or
ON ERROR (or ON COMET ON BLITZEN for that matter), but
a look down the list of keywords doesn't ring any bells.

Something around the PRINT# and INPUT$ statements to do
with the comms buffer.......?????

cheers, TIA

Grumpy Gus

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