Technical Information 1-17
Table 1-4 I/O Address Map
Address (Hex)
Size
Description
LPTn + 400h
8 bytes
ECP port, LPTn base a 400h
0CF8 - 0CFB*
4 bytes
PCI configuration address register
0CF9**
1 byte
Turbo and reset control register
0CFC - 0CFF
4 bytes
PCI configuration data register
0E80 - 0E87
8 bytes
Windows Sound System
0F40- 0F47
8 bytes
Windows Sound System
0FF0 - 0FF7
8 bytes
CS4236B audio control
FF00 - FF07
8 bytes
IDE bus master register
FFA0 - FFA7
8 bytes
Primary bus master IDE registers
FFA8 - FFAF
8 bytes
Secondary bus master IDE registers
007C, bits 5:4
2 bits
Chassis fan RPM sense selection.
* DWORD access only
** Byte access only
System Memory
The system comes with between 32 MB and 512 MB of SDRAM installed in dual in-line
memory module (DIMM) sockets on the system board. (The system supports 1 GB of
DRAM using EDO DIMMs.)
The system board supports the following memory features:
JEDEC MO-161 compliant 168-pin DIMMs with gold-plated contacts.
Unbuffered 66-MHz ECC/non-ECC SDRAM or 60-ns EDO ECC/non-ECC
DIMMs
3.3 V memory only
Single- or double-sided DIMMs in the sizes listed in Table 1-5.