Digital Equipment STARION 20 Series, Service Maintenance Manual

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Device Mapping Digital STARION 9xx & 20xx PC
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I/O Address Map
Range (hexadecimal) Function
000 - 00F DMA controller one
020 - 021 Interrupt controller one
040 - 043 Interval timer
060 - 06F Keyboard controller
070 - 07F Real-time clock (RTC), NMI
080 - 08F DMA page register
0A0 - 0A1
Interrupt controller two
0C0 - 0CF DMA controller two
0F0 Clear math co-processor busy
0F1
Reset math co-processor
0F8 - 0FF Math co-processor
170 - 177 Secondary IDE controller
1F0 - 1F7 Primary IDE controller
220, 240 Diamond SoundBlaster emulation
278 - 27A LPT2
300, 320, 330, 340 Diamond MPU-401 emulation (optional)
530, 604, E80, F40
Diamond Windows sound system emulation
2E8 - 2EF COM4
2E8, 2F8, 3E8, 3F8 Diamond data/fax modem
2F8 - 2FF
COM2
378 - 37A LPT1
3BC - 3BE LPT3
3E8 - 3EF COM3
3F0 - 3F7 Diskette (floppy disk) controller
3F6 - 3F7 Primary/secondary IDE controller (alt status, device address)
3F8 - 3FF COM1
3B0 - 3DF
VGA register
46E8 VGA enable register
42E8, 4AE8, 82E8, 86E8,
8AE8, 8EE8, 92E8, 96E8,
9AE8, 9EE8, A2E8, A6E8,
AAE8, AEE8, B2E8, B6E8,
BAE8, BEE8, E2E8, E2EA VGA enhanced mode registers