Alpha Microsystems AM-990 Manual de servicio - Página 17

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Page 14

If your computer includes an AM-522 ESDI controller board, the maximum memory

capacity is reduced to 12 megabytes. The AM-522 board requires one of the memory

expansion slots for installation.

SBC Expansion I/O

The AM-145 board has one 60-pin connector, located at J9, designed to support a

maximum of 32 serial ports. These ports are in addition to the two standard AM-145

serial I/O ports (0 and 1) shown in the illustration.

AM-355 I/O boards attached to connector J9 use the same interface driver used by the

two serial ports on the CPU board, AM145.IDV. AM-358 and AM-359 I/O paddle cards

connected to the AM-355 I/O bus use the interface drivers called AM358.IDV and

AM359.IDV. Other types of boards designed to be used on the AM-355 I/O bus have

their own unique drivers.

For information on jumper settings, port numbering, and I/O addresses, see the

installation guide shipped with the AM-355 I/O bus device you are installing.

AM-990 SBC Computer Service Manual

DSS-10524-00, Rev. A01