Epson EL 4S/33+ Spécifications - Page 9

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Option card riser hard connector pin assignments (S1) (continued)

*Active low logic

SIMM sockets (RAM1, RAM2, RAM3, RAM4)

Use only 30-pin, 8-bit or 9-bit, fast-page mode SIMMs

(preferably tin-plated) that operate at an access speed of 70ns

(nanoseconds) or faster. SIMMs must operate at the same

speed.

Installation/Support Tips

Installing Diskette Drives

Make sure that the drive type has been correctly selected in

the SETUP program.

Installing Hard Disk Drives

When installing a hard disk drive, see the hard disk drive

type tables on pages 5 and 6 and use the auto-sensing

feature in SETUP to select the correct type number for the

drive. If the auto-sensing feature does not produce a

match for the drive, you can define your own drive type

by selecting User Def 1 or 2 as the type and entering

the drive's exact parameters.

It is recommended that a 16-bit, AT-type hard disk

controller be used if you are installing a drive that cannot

use the embedded IDE interface. If you install a non-IDE

hard disk drive and controller card, you need to disable

the built-in IDE hard disk drive interface by moving

jumpers J21 and J30 to position 2-3.

If you plan to install two hard disk drives in the internal

bays, you must use flat-head screws (#6-32UNC x 8

FH,M,+) to secure the top drive to the mounting bracket.

If you are installing an ESDI hard disk drive, make sure

you disable the built-in IDE hard disk drive interface by

moving jumpers J21 and J30 to position 2-3. Also be sure

to remove the hard disk drive ribbon connector from the

system board.

12/93

Epson EL 4S/33+

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