Re: Where to find... supdup and tn3270 specs


Mark Crispin (MRC@PANDA.PANDA.COM)
Tue, 19 Jan 88 14:31:44 PST


BAD MSG:
sent at startup. They're sent as 6-bit bytes (in our example, as
0 01 20 00 00 54) and on a byte-oriented machine I'd store them
in the least significant 6 bits of 6 consecutive 8-bit bytes.

     If you bothered to read the RFC, you'd realize that there
are no NCP dependencies at all; the connections are 8-bits. A
9 and 12-bit character set for keyboard INPUT are possible for
operating systems which swallow them. The rules for folding
such characters down are well defined in the RFC, and if a
client SUPDUP doesn't want to send such characters it doesn't
have to (all it has to do is not set the bit saying it has such
a keyboard).

     People who have never seen a line of PDP-10 assembly code
have read, understood, and implemented Unix code based on the
SUPDUP RFC. Give it a try.

-- Mark --
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