S1461/6-001-01
2 2
For the S1466, the synchronous SRAM can be upgraded only in boards that
use sockets. A special tool is required to unplug SRAM chips from the
PLCC sockets.
The table below shows the configuration sizes of the SRAM:
(All SRAM must be 10ns or faster)
SRAM Cache Size
Chip Type and Qty J1 J23 J22
256KB
Four 32K*18 2-3 On Off
512KB
Four 64K*18
1-2 Off On
3.13 CMOS RTC
CMOS RTC includes an internal battery and Real Time Clock circuit. It
provides the date and the time for the system. Normally the life span of a
RTC internal battery is 10 years. When replacing, you should use the same
model.
3.14 Speaker Connector Installation
S1461/3/6 provides a 4-Pin header J26(S1463/6) or J27(S1461) to connect
the speaker. The polarity can go either way.
3.15 Turbo Switch
The front panel on your case may have a turbo switch to control system
speed when slower program execution is required for software developed
in the old XT days.
Because the Pentium CPU cannot slow its clock speed on the fly, the
S1461/3/6 uses a simulation method to implement TURBO switching. The
jumper marked J16(S1466), J15(S1463)or J17(S1461)on the mainboard should
be connected to the TURBO switch on the case panel.
