Adaptec AHA-1540 User Manual - Page 7
H, 230H
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Section Three Installation 3.3.3 AT Port Address The starting address of the block of four I/O ports required by the AHA-1540 is selected by the jumpers in jumper block J9. This jumper set is located just above the left corner of the large AT bus connector. Pin pair 1 is the left most pair of pins. The default address is 0330H and must not be changed unless a new BIOS is supplied. The port address is coded in the BIOS and must match. Valid port addresses are 334H, 330H, 234H, 230H, 134H, and 130. The default address is 330H. LSB MSB Port Address Pin Pair 1 2 3 4 5 6 7 8 Port I/O Address Bit 004H 008H 010H 020H 040H 080H 100H 200H 3 4 7 8 XX00XXO 01 XX00XX00 -1- -1- LDefault Address 330H Pin Pair 1 X = Jumper Installed, Jumper Deasserts the Address Bit. Valid Addresses Are: 334, 330, 234, 230, 134, 130 AHA-1540 3 - 6 adaptec