402-00005-00
Registers
3–14
Rev 02; February 8, 2002
3.1.14 Base Address Three (BADR3) R-O
0
7
Address offset 0x1C
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
8
15
ADR15
ADR14
ADR13
ADR12
ADR11
ADR10
ADR9
ADR8
BADR3
16
23
ADR23
ADR22
ADR21
ADR20
ADR19
ADR18
ADR17
ADR16
24
31
ADR31
ADR30
ADR29
ADR28
ADR27
ADR26
ADR25
ADR24
This register is boot-loaded at power-up with a value that indicates the amount of address space required for the
Frame Buffer Control registers, Output Control Table and Scatter Gather Table (256K DWORDs or 1MB required).
During power-up the PCI host system reads this register to determine the size of the address region and assigns a base
address. The PCI host writes the assigned base address in this register. The user application can determine the as-
signed address by reading Base Address Register Three (BADR3). This register is read only to the user application.
The Frame Buffer Control Register Address space is defined as 32-bit (DWORD) access only.
3.1.15 Base Address Four (BADR4) R-O
0
7
Address offset 0x20
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
8
15
ADR15
ADR14
ADR13
ADR12
ADR11
ADR10
ADR9
ADR8
BADR4
16
23
ADR23
ADR22
ADR21
ADR20
ADR19
ADR18
ADR17
ADR16
24
31
ADR31
ADR30
ADR29
ADR28
ADR27
ADR26
ADR25
ADR24
This register is boot-loaded at power-up with a value that indicates the amount of address space required for the
PCVisionplus Image memory (4MB required). During power-up the PCI host system reads this register to determine
the size of the address region and assigns a base address in the memory address region (always memory mapped).
The PCI host writes the assigned base address in this register. The user application can determine the assigned ad-
dress by reading Base Address Register Three (BADR3). This register is read only to the user application. Access to
the image memory is 32-bit (DWORD) only.
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