| User Manual version 2503 | ||
D: System I/O Ports |
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Address range (Hex) | Device |
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DMA controller |
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Interrupt controller 1, master |
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Chipset address |
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8254 timer |
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8024 keyboard controller |
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Real time clock, |
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| interrupt mask (NMI) |
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DMA page register |
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Interrupt controller 2 |
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DMA controller |
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0F0 | Clear math |
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0F1 | Reset math |
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Math |
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Fixed disk |
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Game Port (not used) |
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443 | Watchdog timer |
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143 | Watchdog timer |
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208 | DIO port |
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2E8 | Serial port #4 |
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Serial port #2 |
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Prototype card (not used) |
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Reserved |
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Parallel printer port 1 (LPT1) |
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SDLC, bisynchronous 2 (not used) |
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Bisynchronous 1 (not used) |
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Monochrome display and printer |
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| adapter (LPT1) (not used) |
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Reserved |
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Color/graphics monitor adapter |
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3E8 | Serial port #3 |
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Diskette controller |
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Serial port #1 |
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LIBRA 120 III (PC620 Intel 815E) | |||
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