Digital Equipment AXPpci 33, Руководство по конструкции

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System Summary
Table 1–1 (Cont.) Digital AXPpci 33 System Summary
Input/Output
Input device interfaces AT or PS/2 style keyboard and mouse.
Serial Two RS–423 (9-position) compatible serial communications ports.
Parallel One parallel (Centronics compatible) communications port.
Bus options Total of seven option slots.
PCI Peripheral component interconnect. Supports three 5 V/32-bit PCI
(33 MHz) option slots with a peak performance of 132 MB/sec: two
long (12.354 inches) and one short (6.946 inches) module. One
long PCI slot shares the same bulkhead slot with one long ISA
(industry-standard architecture) slot. See Appendix C for a list of
tested options.
ISA Supports five ISA option slots: two long (13.415 inches) and three
short (6.945 inches) modules. One long ISA slot shares the same
bulkhead with one long PCI slot. See Appendix C for a list of tested
options.
FAST SCSI–2 One NCR 53C810 SCSI controller supporting a single-ended bus.
One internal SCSI connector; seven devices plus a controller.
Asynchronous operation at 5 MB/s or synchronous operation at
10 MB/s. See Appendix C for a list of tested options.
IDE One IDE interface supporting up to two drives.
Floppy One 82077-compatible diskette controller supporting up to two drives:
For Windows NT: 1.2 MB, 1.44 MB, and 2.88 MB formats.
For Digital UNIX: 1.44 MB and 2.88 MB formats.
See Appendix C for a list of tested options.
Physical Characteristics
Form factor Baby–AT system module
Width/depth/height
(with the DECchip 21066, high-profile
heatsink and option modules) English: 8.65 inches/13.865 inches/5.573 inches
Metric:
220 mm/353 mm/142 mm
Weight
(with the DECchip 21066 and high-profile
heatsink) 1.85 lbs/840 grams
Power supply voltages
(main logic board [MLB] only) +5 V, +12 V, -12 V, -5 V
(+3.3 V supply connection is available for PCI options.)
Refer to Chapter 3 for current consumption.
Environmental Characteristics (Operational)
Temperature See Chapter 3 for air flow ambient temperatures.
Temperature change rate (maximum) 20°C/hr (36°F/hr)
Relative humidity 10–95% noncondensing
Maximum wet bulb 32°C (90°F)
Minimum dew point 2°C (36°F)
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