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Technical Information 1-9
Table Section 1-5 I/O Address Map
Address (Hex)
I/O Device Name
0A0-0BF
Interrupt controller 2
0C0-0DF
DMA controller 2 (channel 4-7)
0E0-0EF
Reserved
170-177
2nd hard disk
1F0-1F7
1st hard disk
1F9-1FF
Reserved
200-207
Game I/O adapter (not available)
220-233
Sound board
278-27F
2nd parallel port (3rd with DMA)
2F8-2FF
2nd asynchronous communications port
330-331
MIDI Port
370-377
Diskette controller 2
378-37F
1st parallel port (2nd with DMA)
388-38B
FM Synthesizer
3A0-3AF
Primary bisynchronous communications port
3B0-3DF
Video Graphics Array (VGA)
3B0-3BF
Monochrome display adapter/printer 1
3C0-3CF
Enhanced Graphics Adapter (EGA) 1
3D0-3DF
Color/Graphics Adapter (CGA and EGA)
3F0-3F7
Diskette Controller
3F8-3FF
Serial Port 1
System Memory
The Power V486 system boards come standard with 8 MB of RAM (PowerMate V4100
multimedia systems come with 16 MB). The first megabyte includes the standard 640 KB
of base memory. The remaining memory is extended memory. Two SIMM sockets are in-
tegrated on the system board. The maximum possible memory is 64 MB.
The SIMM memory sockets accept 4-, 8, 16-, or 32-MB SIMMs. Two 32-MB SIMMs may
be installed for a total of 64 MB. High-speed RAM is 32 bits wide (no parity) or 36 bits
wide (with parity). No parity SIMMs are 1 MB x 32 bit (4 MB), 4 MB x 32 bit (16 MB),
and 8 MB x 32 bit (32 MB). There are no switches or jumpers to set when SIMMs are
added.