Technical Information 1-9
Table 1-3 I/O Address Map
Address (Hex)
I/O Device Name
0000-000F
DMA controller 1 (channel 0-3)
0020-0021
Interrupt controller 1
0040-0043
Timer 1
0048-004B
Timer 2
3F8-3FF
Serial port 1
CF8-CFF
PCI configuration space
System Memory
All systems come standard with 16 MB of EDO memory: 640 KB of base memory and 15
MB of extended memory. System memory can be expanded up to 128 MB, using optional
single in-line memory modules (SIMMs) installed in SIMM sockets on the system board.
Four SIMM sockets are integrated on the system board. The multimedia and 1.2-/2.0-GB
hard disk configurations ship with two 2 MB x 32 SIMMs) (16 MB total) installed in two
sockets.
The SIMM memory sockets accept 32-bit (non-parity) 4-, 8-, 16-, or 32-MB 60 ns or 70 ns
SIMMs. The SIMMs are 1 MB x 32 bit (4 MB), 2 MB x 32 bit (8 MB), 4 MB x 32 bit (16
MB), and 8 MB x 32 bit (32 MB). When the standard SIMMs are removed, four 32-MB
SIMMs may be installed for a total of 128 MB.
CAUTION:
SIMMs must match the tin metal
plating used on the system board SIMM sockets.
When adding SIMMs, use tin-plated SIMMs.
SIMMs install directly in the four sockets on the system board. The four sockets are
assigned as SIMM 1 through SIMM 4. The two standard 8 MB SIMMs are installed in
SIMM 1 and SIMM 2. SIMMs must be installed in pairs of the same memory type. Jumpers
are not required to set memory size or type as the system BIOS automatically detects the
SIMMs. SIMM banks 1 and 2 must always be filled for the system to operate. Table 1-4
shows the SIMM memory upgrade path.
