HP 9000 Series 310 Service Information Manual page 92

With the HP 98626 card, the Boot ROM will use the baud rate, pacing, and line characteristics
specified by the card's configuration switches. The "handshake type" bits in the Line Control
Switch Register are shown as "reserved for future use" in the Installation Manual. The definition
given these bits by other OS's, and the one adhered to by the Boot ROM is:
Bit 6
Bit
7
Handshake type
0
0
ENQ/CK
1 0
XON/XOFF
0 1
no handshake
1 1
no handshake
NOTE
HP 98626 cards are shipped with these switches at zero. When booted
with ENQ/ ACK enabled on the HP 98626 card and XON /XOFF en-
abled on the terminal, the Boot ROM sequence stops, waiting forever
for a response.
Since the HP 98644 and HP 98642 cards do not have line characteristic switches, they will always
be assigned the following characteristics when used as remote console by the Boot ROM:
• 8 bits/char,
• No parity,
• A single stop bit,
• 9600 baud, and
• XON/XOFF handshaking.
The terminal's display will be the same as a monitor driven by video electronics on a 98561-
66511 processor board. Keyboard functions will also be the same, except that the
I
Break
I
key on
the terminal is mapped to the
I
Reset
I
key on the local keyboard.
During the self-test of I/O cards, the card driving the remote interface will not be disturbed. It
was tested earlier and passed. Otherwise, the interface could be disabled.
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Boot Rom Functions