Av: Escape Character; Break: Change Console Keyboard Master; Lap Initiated Self Tests - HP 3000 Series Handbook

-a:
XON Pacing Character
Definition:
For HP Internal Use Only
This character causes the lAP to resume passing characters to the console terminal (or
terminals) if all connected console terminals are not in the XOFF state. This character is
flagged as a special character and passed on to the host system. See the section on Console
Flow Control for more details.
-s:
XOFF Pacing Character
Definition:
This character causes the lAP to stop passing characters to the console terminals. This flow
control character may be sent by either the master or the slave console terminal, and the lAP
must respond to either terminal sending the XOFF by stopping the flow of characters to the
terminal. The lAP will not send characters to either console terminal if one of them has sent
an XOFF. To prevent both terminals from being locked up, each time an XOFF is received,
a two second timer is initiated for the port at which the XOFF was received. After two
seconds elapse with no XON character from that port, the transmitter will be re-enabled and
character transmission will resume. See the section on Console Flow Control for more details.
-v:
Escape Character
Definition:
Entering this character on the active console terminal nullifies any special character processing
of the following character (with the exception of the XON and XOFF character) and the
AV
character is ignored. Thus, for example: vi users will need to enter
AB
preceded by a
AV
to
page backwards while in console mode.
BREAK: Change Console Keyboard Master
Definition:
Entering this character from the slave console immediately switches the slave console to
console master and the break character is put in the bit bucket. When this character is
entered from the console master however, it is sent on to the host system.
lAP Initiated Self Tests
The Integrated Access Port also has the ability to initiate a card self test (using the TA
command). While parts of the I/0 card with the Integrated Access Port must be completely
functional in order to have the lAP start the self test, there may be some critical function that
is required to boot the system that is not used by the lAP to communicate with the console
terminal. The self test that the lAP initiates should provide a sufficient test to verify the card
is functional, as far as it is capable of testing itself. Since this card is the first line of defense
for supporting the SPU hardware, this test must be complete.
9-14 Functional Description