Registers
PCVisionplus
Hardware Reference
3–15
Rev 02; February 8, 2002
3.1.16 Base Address Five (BADR5)
0
7
Address offset 0x24
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
8
15
ADR15
ADR14
ADR13
ADR12
ADR11
ADR10
ADR9
ADR8
BADR5
16
23
ADR23
ADR22
ADR21
ADR20
ADR19
ADR18
ADR17
ADR16
24
31
ADR31
ADR30
ADR29
ADR28
ADR27
ADR26
ADR25
ADR24
This address register is not used by the PCVisionplus and returns all zeros if read. This register is read only.
3.1.17 Expansion ROM Base Address (XROM) R-O
0
7
Address offset 0x30
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
8
15
ADR15
ADR14
ADR13
ADR12
ADR11
ADR10
ADR9
ADR8
XROM
16
23
ADR23
ADR22
ADR21
ADR20
ADR19
ADR18
ADR17
ADR16
24
31
ADR31
ADR30
ADR29
ADR28
ADR27
ADR26
ADR25
ADR24
Expansion ROM is not supported on the PCVisionplus. This register is reserved and will return all zeros if read. This
register is read only.
3.1.18 Interrupt Line (INTLN) R/W
0
7
Address offset 0x3C
INTLN7
INTLN6
INTLN5
INTLN4
INTLN3
INTLN2
INTLN1
INTLN0
INTLN
This register indicates the interrupt routing for the PCVisionplus. The ultimate value for this register is system-archi-
tecture specific. In x86 based systems, the values in this register correspond with the established interrupt numbers
associated with the dual 8259 controllers used in those machines. In x86 based PC systems, the values of 0 through
15 correspond with IRQ0 through IRQ15, and the values from 16 to 254 are reserved. This register is boot-loaded at
power-up with 0xFF (255) indicating an unknown or unconnected system interrupt. This register is read/write.
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