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Upgrading Circuit Cards
The 486 CPU Circuit Card – 50MHz or
25MHz
In Version V4.0, there are two supported CPU options: 386 and 486. This hard-
ware upgrade kit is designed for MAP/40 customers upgrading from 386 to 486.
The information in this chapter pertains to the 486 CPU card only . For information
about the 386 CPU, refer to MAP/40 Voice Processing Hardware Installation , 585-
350-109.
!
WARNING:
Observe proper electrostatic discharge precautions when handling computer
components. Wear a ground wrist strap against your bare skin and connect
to an earth ground.
Either a 486 50MHz or 486 25MHz CPU circuit can be used in the MAP/40 plat-
form. You must use a 486 50MHz if you are using the Graphical Speech Editor
feature package. See the next figure to locate where the 486 is labeled to indicate
50MHz or 25MHz.
The manufacturer packages the central processing unit (CPU) on a single PC/AT
compatible circuit card that plugs into the passive backplane. The 486 supports a
16 MB SIMM which is located in the bottom socket on the left side of the card.
To install the 486 CPU, complete the following:
Verify jumpers that enable or disable the serial and parallel ports.
Verify switch settings.
Refer to ''General Steps for Circuit Card Installation'' found in this chapter
to install the 486 card.
Connect keyboard and serial port ribbon cables.
Complete the 486 setup as described in "System Setup" in Chapter 3,
"Connecting Peripherals and Powering Up," of MAP/40 Voice Processing
Hardware Installation , 585-350-109.
Refer to the figure on the next page for location of jumpers and switches.
3-4
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