6
APPENDIX A
I/O Port Map
The fol low ing is a list of PC I/O ports. Ad dresses marked with a '-' are not used on the
PCM- 586 but their use should be care fully quali fied so as not to con flict with other I/O
boards. I/O ad dresses marked with a '+' are used by the PCM- 586 board and are unique to
the Win Sys tems de sign. I/O Ad dresses marked with '**' are gen er ally un used and should
be the ba sis for the first choices in I/O ad dress se lec tion.
Hex Range
Us age
000- 00F
8237 DMA #1
**0010- 01F
FREE
020- 021
8259 PIC #1
+022- 023
M6117 Chipset Reg is ters
**024- 03F
FREE
040- 043
8254 Timer
**044- 05F
FREE
060- 06F
8042 Key board con trol ler
070- 071
CMOS RAM/RTC
**0072- 07F
FREE
080- 08F
DMA Page Reg is ters
**090- 09F
FREE
0A0- 0BF
8259 PIC #2
0C0- 0CF
8237 DMA #2
**0E0- 0FF
FREE
0F0- 0F1
Co proc es sor Con trol
0F2- 0F3
2089 Chipset Reg is ters
0F4- 1DF
FREE
+1E0- 1EF
Watch dog timer, SSD Con trol, SSD con figu ra tion, and LED
1F0- 1FF
Fixed Disk I/O
-200- 20F
Joy stick Port
-210- 21F
PCM- SSD I/O Ports
-220- 22F
Sound blas ter I/O Ports
**230- 237
FREE
-238- 23B
BUS Mouse
**240- 277
FREE
278- 27F
LPT1
**280- 2AF
FREE
-2B0 -2DF
EGA Video
-2E0 -2E7
GPIB In ter face
-2E8 -2EF
COM4
**2F0- 2F7
FREE
2F8- 2FF
COM2
-300- 31F
Pro to type Card
-320- 32F
XT Hard Disk
**330- 377
FREE
021402
OPERATIONS MANUAL PCM-586
Page 6-1
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