Data General AViiON 5500 Series, Установка, расширение и обслуживание

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System board and system bus options
A-2
014–002250–01
System board
Printed–circuit board with side panel mounting, contains:
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One Motorola 88110 microprocessor
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One Motorola 88410 cache and memory management unit (CMMU)
with 256 kilobytes cache RAM.
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One NCR single–ended SCSI controller
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One AMD 802.3 Ethernet LAN controller
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Three asynchronous serial peripheral ports (RS-232-C)
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One synchronous serial peripheral ports (RS-232-C; full-duplex)
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One parallel printer port; Centronics LPT1 compatible
Main memory
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Socket connectors for three banks of four Single In–Line Memory
Modules (SIMMs) –– (4–, 16–, or 32–megabyte)
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ECC with single– and double–bit error detection, single–bit error
correction
Minimum: 32 megabytes
Maximum: 256 megabytes
SCSI bus
Maximum of five buses per system: one integrated on system board;
up to four on optional expansion I/O boards
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Each controller supports seven devices maximum (internal or
external)
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Asynchronous operation mode support (5 Mbytes/s maximum)
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Synchronous operation mode support (5.5 Mbytes/s maximum)
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Integrated NCR 53C710 Small Computer System Interface (SCSI)
controller
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Single–ended interface by default
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Maximum of five internal devices (four 3.5–inch half–height
device bays and one 5.25–inch half–height bay)
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One or two optional expansion I/O boards, each adapter board
contains two controllers
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Configurable single–ended or differential SCSI interface
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Maximum of seven external devices per bus