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User Manual version 2503
LIBRA 120 III (PC620 Intel 815E)
6-
117
D: System I/O Ports
Address range (Hex)
Device
000-01F DMA controller
020-021 Interrupt controller 1, master
022-023 Chipset address
040-05F 8254 timer
060-06F 8024 keyboard controller
070-07F Real time clock, non-maskable
interrupt mask (NMI)
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0 Clear math co-processor
0F1 Reset math co-processor
0F8-0FF Math co-processor
1F0-1F8 Fixed disk
200-207 Game Port (not used)
443 Watchdog timer
143 Watchdog timer
208 DIO port
2E8 Serial port #4
2F8-2FF Serial port #2
300-31F Prototype card (not used)
330-331 MPU-401 Compatible
360-36F Reserved
378-37F Parallel printer port 1 (LPT1)
380-38F SDLC, bisynchronous 2 (not used)
3A0-3AF Bisynchronous 1 (not used)
3B0-3BF Monochrome display and printer
adapter (LPT1) (not used)
3C0-3CF Reserved
3D0-3DF Color/graphics monitor adapter
3E8 Serial port #3
3F0-3F7 Diskette controller
3F8-3FF Serial port #1
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