System Memory - NEC POWERMATE PROFESSIONAL 9000 Service Manual

Address (Hex)
LPT n + 400h
0CF8 - 0CFB*
0CF9**
0CFC - 0CFF
0E80 - 0E87
0F40- 0F47
0FF0 - 0FF7
FF00 - FF07
FFA0 - FFA7
FFA8 - FFAF
007C, bits 5:4
* 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:
T
JEDEC MO-161 compliant 168-pin DIMMs with gold-plated contacts.
T
Unbuffered 66-MHz ECC/non-ECC SDRAM or 60-ns EDO ECC/non-ECC
DIMMs
T
3.3 V memory only
T
Single- or double-sided DIMMs in the sizes listed in Table 1-5.
Table 1-4 I/O Address Map
Size Description
8 bytes ECP port, LPT n base address + 400h
4 bytes PCI configuration address register
1 byte Turbo and reset control register
4 bytes PCI configuration data register
8 bytes Windows Sound System
8 bytes Windows Sound System
8 bytes CS4236B audio control
8 bytes IDE bus master register
8 bytes Primary bus master IDE registers
8 bytes Secondary bus master IDE registers
2 bits Chassis fan RPM sense selection.
Technical Information 1-17