Compaq Deskpro EP 6233 - 100-MHz Slot 1 Subsystem

Technical Reference Guide
Compaq Deskpro EP Series of Personal Computers
First Edition - April 1998
3-9
64-Bit 100-MHz
Mem. Data Bus
Mem. Addr.
3.3 100-MHz SLOT 1 PROCESSOR/MEMORY SUBSYSTEM
Systems using the 100-MHz slot 1 (3-DIMM) system board feature the 350- or 400-MHz
Pentium II processor with an 82443BX system controller (north bridge) and 64 megabytes of
system memory expandable to 384 megabytes (Figure 3-5).
Figure 3–5.
100-MHz Slot 1 Processor/Memory Subsystem Architecture
The Pentium II processor is mounted in a slot 1-type connector that facilitates easy
changing/upgrading. Replacing the processor may require reconfiguring DIP switch SW1 to
select the correct bus frequency/core frequency combination. Frequency selection is described in
detail later in this section.
The 443BX system controller provides the Host/PCI bridge functions and controls data transfers
with system memory over the 64-bit memory data bus. This system supports SDRAM and ECC
DIMMs and can be expanded to 384 megabytes.
Pentium II
SEC Cartridge
(in Slot 1)
32-Bit 33-MHz PCI Bus
Optional module
64-MB
DIMM
DIMM
J1
J2
System Memory
100-MHz
64-Bit Host Bus
Host/PCI
Controller
(82443BX)
Cntl
DIMM
J3
66-MHz
32-Bit
AGP Bus
Graphics
Card