

Status


This is a list of serious known bugs and features that, although
described in this manual, are not actually implemented yet.


PC/term:  control-scrolllock exits on-hook, rather than with DTR
restored to its original value.

PC/term:  at data rates of 4800 bits/second and below, when
two-character sequences are transmitted in response to a single
keyboard key, (such as for function keys and cursor controls)
one of the characters is sometimes lost.

Internet Protocol:  Because the PC implementation does not
currently reassemble fragmented packets, none of the PC/IP
packages can be used with hosts that gratuitously fragment large
packets or through gateways that fragment packets.  Currently
MIT-Multics is the only known ARPANET host that gratuitously
fragments large packets, making tftp service unusable for files
larger than 128 bytes.  (PC/telnet is usable with MIT-Multics,
because Multics TCP never tries to send large packets.)  Within 
the M.I.T. environment, large packets are fragmented only when 
they traverse the CHAOS network.

PC/Telnet:  if, while using the tftp server, a disk problem 
occurs that leads DOS to display a message (e.g., "Disk not 
ready:  abort, retry or ignore?") DOS attempts to display the 
message without realizing that PC/telnet is operating the screen 
with offset pointers.  Thus the DOS message may appear in a 
random place on the screen, cut apart in two pieces, or even not 
appear at all.  If the user types a response to the question, 
the response will be accepted by DOS and (assuming that the DOS 
file operation is successful) the display returns to normal.


PC/AT:  All PC/IP programs have been checked on the PC model AT
using both the Ethernet and serial line drivers.  Although all
appear to work correctly, some problems that may be symptoms of 
lost interrupts have been noted.  The most serious symptom is 
that while transferring files to or from diskettes, the diskette 
drive occasionally appears to fall out of the ready status.  (A 
retry always finds that the disk is actually ready.)  Note that 
when this problem occurs,the error message that DOS produces
triggers an instance of the previous problem.

PC/tftp:  Exhibits occasional flakiness.  If one starts a series 
of transfers to or from the server, on some PC's tftp will crash
after 50 or 100 files have transferred.  On other PC's, there is
apparently no problem.


21 January 1985.  This document is in file status.txt

