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C-16 Sun Ultra 60 Service Manual • August 2001
C.1.8.1 CD-ROM Drive
The CD-ROM drive is a standard SCSI interface device with multimedia features.
This includes multi-session capability and fast access (12X-speed) for image and
video data. The CD-ROM drive dimensions are 5.94 inch (149.5 mm) x 7.78 inch
(196 mm) x 1.71 inch (43 mm) and the drive slot is a standard 1.6-inch (40.64 mm)
bay that uses industry standard bezels. Headphone access, eject, pin eject, and
volume control are available on the front panel. Audio from the CD is available
through either the front panel headphone connection, the line-out connector at the
system unit rear (accessible by cabling from front to rear), or the internal speaker.
The CD-ROM drive supports an approximate data transfer rate of 600 Kbyte/s and
an access time of 350 ms (maximum). The SunCD 12X Installation and User’s Guide,
part number 805-0940, provides cleaning, jumper setting, and operation instructions
for the CD-ROM drive.
C.1.8.2 Diskette Drive
The system unit uses a standard 1.44-Mbyte diskette drive that is 1 inch (25.40 mm)
high. The system-to-diskette drive interface is an 82077 style interface. Refer to the
Manual Eject Diskette Drive Specifications, part number 805-1133, for cleaning, jumper
setting, and instructions for the diskette drive.
SuperIO Diskette Drive Interface
The SuperIO component contains an onboard diskette drive controller. There is a
16-byte first-in-first-out (FIFO) device that buffers and supports burst and non-burst
modes. The diskette drive controller handles data rates of 500 Kbps and 250 Kbps.
Supported Features
Two additional pins on the Cheerio ASIC combine with the SuperIO diskette drive
interface to support all standard Sun diskette drives. This includes
Density_Select-type diskette drives, Density_Sense-type diskette drives, and diskette
drives that use a Disk_Change signal.
Diskette Drive Connectors
Power is supplied to the diskette drive from a pigtailed connector at the power
supply. The diskette drive operates from a 5-Vdc supply and uses a maximum
power of 1.1 watts during operation. A maximum of 44 milliwatts is used during