Table 2-1. Sw2 Start-Up Switch Settings - HP 1000 A990 Installation And Service Manual

Table 2-1. SW2 Start-Up Switch Settings
Computer Action
Swlt~h~~*
S1 S2 S3 S4 S5 S6 S7 S8
Loop on self-test Test 2 regardless of error. D D D D z
Y
D M
Loop on self-test Test 2 and stop on error. D D U D z
Y
D M
Run Virtual Control Panel (VCP) routine on completion of self-test. D U U D z
Y
D M
For the following switch settings, the computer action indicated will occur if memory is lost, otherwise, the program
is restarted (JMP 4B). If the autorestart feature is disabled (switch SW2-8 down), the program cannot restart and
VCP will execute. When a loader finishes an autoboot, it starts execution of the loaded program at location 02.
Run VCP. U D D D z
Y
D
M
Speed sense and run VCP. See Notes 2 and 3. U U
D
U z
Y
D M
Execute program from PROM card. In order to autoboot from PROM, the card
U
D U D z
Y
D M
must have select code 22. This is equivalent to the loader command %BRM.
**
Load and execute the program via the HDLC or LAN card. To autoboot via U
U D D z
Y
D M
the HDLC or LAN card, the card must have select code 24. This is equivalent
to loader command %BDS.
**
Load and execute program from the first file of the disk (via HP-IB or SCSI). U U U
D
z
Y
D M
To autoboot via HP-IB or SCSI, the interface card must have select code 27;
and, for HP-IB, the disk drive must have HP-IB address 2 or, for SCSI, ad-
dress 6. This is equivalent to the loader command %BDC.
**
Execute bootstring from the time-of-day clock RAM (non-volatile RAM) on D
D D
U z
Y
D M
the A990 CPU card.
*
D
=
Down (On); U
=
Up (Off)
**
Refer to the HP 1000 A990 Computer Reference Manual, part number 02959-90001.
y
=
D, normal mode, system console uses ENQ-ACK handshaking.
y
=
U, system console does not use ENQ-ACK handshaking.
z
=
D, normal mode, break enabled.
z
=
U, break disabled (but not halts).
M
=
D, disable autorestart (battery backup not installed).
M
=
U, enable autorestart (battery backup installed).
Notes: 1. Do not use any switch combination that is not specified above.
2. Use this switch configuration for normal computer operation.
3. Speed sense allows VCP to execute at any baud rate supported by the 8-channel MUX.
2-6 Installation