#: 13754 S10/OS9/6809 (CoCo)
    29-Dec-91  10:47:14
Sb: Parallel saga
Fm: Ian Hodgson 72177,1762
To: All

The saga of the parallel driver continues. To all those who responded to my
earlier queries, thanks. As it turns out, the strobe is strictly *hardware*
timed on the Disto 4 in 1 board so there didn't seem to be much point in
barking up that tree.

But, I disassembled the parallel driver (the patched one from paral.ar in LIB
10) and re-discovered that two writes were done to the parallel port in
immediate succession, perhaps in an effort to extend the width of the strobe
pulse for a slow printer. Editing out one of the writes and reassembling seems
to have cured the problem with the duplicate characters completely, and
operation is now completely normal.

Ummmm... well, not 1000% perhaps. Once, and only once, so far, a very odd thing
happened while I was exploding a file into its modules (which had nothing at
all to do with the printer). The printer suddenly printed out a very neat
diagram of its DIP switch settings. According to the NX1000 manual, the ability
to print status does not exist. Hmmmm..... But I can't make it happen again. I
will delay posting a new IPatch for Parallel until I have used it for a couple
of weeks.