TCP201 User Manual Issue 1.4
Page 12 of 35
3.1.2.3 Expansion ROM Base Address Implementation
5. Write a value of ‘1’ to bits 11 through 31 of PCI Base Address Local Expansion ROM Register.
6. Starting at bit location 11 of the PCI Base Address Local Expansion ROM Register, search upward
for the first bit set to a value of ‘1’. This bit is the binary size of the total contiguous block of memory
address space needed by the PCI9030.
For example, if bit 16 of the PCI Base Address Local Expansion ROM Register is detected as the
first bit set, the device is requesting a 64 kilobyte block of memory address space.
7. Write the start address of the requested memory address block to the PCI Base Address Local
Expansion ROM Register. This memory address region must not conflict with any other memory
space utilized within the system.
The Expansion ROM is not used by the TCP201.
For further information please refer to the PCI9030 manual which is also part of the TCP201-ED
Engineering Documentation.