Special Control Register - VersaLogic Komodo VL-EPICs-36 Reference Manual

Special Control Register

SCR (Read/Write) CA2h (or C92h)
D7
BIOS_JMP BIOS_OR
Bit Mnemonic
D7 BIOS_JMP
D6 BIOS_OR
D5 BIOS_SEL
D4-D0 Reserved
VL-EPICs-36 Reference Manual
D6 D5
BIOS_SEL Reserved
Table 27: Special Control Register Bit Assignments
Description
System BIOS Selector Jumper Status — Indicates the status of the system
BIOS selector jumper at V1[1-2].
0 = Jumper installed – backup system BIOS selected
1 = No jumper installed – primary system BIOS selected
This bit is read-only.
BIOS Jumper Override — Overrides the system BIOS selector jumper and
selects the BIOS with BIOS_SEL.
0 = No BIOS override
1 = BIOS override
BIOS Select — Selects the system BIOS when BIOS_OR is set.
0 = Backup BIOS selected
1 = Primary BIOS selected
These bits have no function.
D4 D3
Reserved Reserved
Special Registers
D2 D1
Reserved Reserved
D0
50