AT&T 3B2/300 Technical Reference Manual page 30

EQUIPMENT D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
Minimum 3B2 Computer Equipment Configuration
The minimum 3B2 computer equipment configuration consists of a 3B2/300 computer equipped
with the following:
• System Board, ED-4C637-30,Gl equipped with a WE 32100 Microprocessor, WE 32101 Memory
Management Unit, 8.2-MHz system clock. Early models use a CM190A System Board equipped
with a WE 32002 Processor Module and a 7.2-MHz system clock (28.8-MHz oscillator divide by
four).
• One 5.25 inch, 720-kilobyte (formatted), double-sided, 96 tracks-per-inch floppy disk drive.
• One 10-megabyte (formatted) hard disk drive.
• A 0.5-megabyte Random Access Memory (RAM). Four expansion slots are provided for the
equipage of feature cards.
• A data terminal connected to the CONSOLE port.
To this minimum 3B2/300 computer configuration, additional hard disk drives, floppy disk drives,
and cartridge tape drives can be added via the equipage of one or more AT&T/XM cabinets. The
integral hard disk drive configuration can also be expanded by changing the hard disk to a large
capacity drive. A maximum of 432 megabytes of ST-506 hard disk memory (six 72-megabyte hard disk
drives) can be equipped with a 3B2/300 or 3B2/310 computer and AT&T/XM cabinets. The size of the
RAM can be expanded to a maximum of 4 megabytes. (Computers equipped with a red
ON/STANDBY switch require a power supply upgrade to expand RAM above 2 megabytes.) A SCSI
Host Adapter card (CMl 95W) can be used to interface a wide range of mass storage peripheral devices.
Refer to the AT&T SCSI (Small Computer System Interface) Definition, (Select Code 305-013), for
additional information on this capability.
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