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Chapter 4 PA-RISC Computer Systems - OpenPA.net

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HP 9000/725 Internals<br />

725/100<br />

Buses<br />

� LASI chipset.<br />

� NCR 53C710 8-bit single-ended SCSI-2<br />

� Intel 82596CA 10 Mbit Ether<strong>net</strong> controller<br />

� WD 16C522 compatible parallel<br />

� Harmony CD/DAT quality 16-bit stereo audio<br />

� NS 16550A compatible serial<br />

� Wax chip<br />

– EISA bus converter (GSC-to-EISA)<br />

– Second RS232 serial<br />

– HP-HIL<br />

� Artist graphics, 8-bit<br />

� Intel 82503 Ether<strong>net</strong> transceiver, media auto-selection<br />

� CS4215 or AD1849 programmable CODECs<br />

� WD37C65C Floppy controller<br />

� Two AM29F010 Flash EPROMs<br />

� GSC system-level I/O bus<br />

� EISA additional I/O expansion bus<br />

� 725/50, 725/75: PBus processor/memory bus<br />

� 725/50, 725/75: VSC main system bus<br />

� 725/50, 725/75: SGC expansion of the mainbus to the SGC expansion card<br />

� SCSI-2 single-ended narrow bus (Fast on 725/100)<br />

Memory<br />

� 72-pin ECC SIMMs<br />

� Takes 8-32 MB modules<br />

� Eight sockets<br />

� 32 MB (2×16) minimum, 256 MB (8×32) maximum<br />

164

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