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CPUs 1
Clock speed 16.67 MHz
Processor Motorola 68020
Co-processor Motorola 68881
MMU Sun-3,   8 hardware contexts
Motherboard 501-1074,   501-1096,   501-1163,   501-1164,   501-1208
On-chip cache  
External cache  
Memory 24 MB,   256 MB virtual
Uses 260ns memory.
4 MB memory on the main board.
A maximum of five 4 MB boards can be plugged in.
Speed 2 MIPS
Chassis type deskside
Bus 12 VME slots,   board size 9U
Ports (2) serial ports.
(1) AUI ethernet.
(1) ECL graphics.
(1) type-3 keyboard and mouse
Internal storage In the upper third is a compartment for two disks (5.25" full height devices) and one tape drive or CD-ROM
Graphics There is a black & white graphics card (1152x900) on the motherboard.
Color VME-Bus graphics cards can be used also.
Power supply 1000 watt
Architecture sun3
OS's supported First supported in SunOS 3.0.
Last supported in SunOS 4.1.1U1.
Notes First sun server with a 68020.
Uses the 3004 "Carrera" CPU, which is used in most other Sun 3/1xx models and the 3/75.
Third party memory boards had up to 32 MB on one card.
SCSI optional.
One variant of the memory card holds a 6U VME SCSI board.
There is also a SCSI board which sits in slot 7 of the backplane and runs the SCSI bus out the back of the backplane to the internal disk/tape (slot 6 in very early backplanes).
Upgradeable to a 3/260 by replacing the motherboard and memory boards.
See also.. 3/260

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