Technical data

Device Mapping
Digital HiNote VP 500 Service Guide
B–3
I/O Address Map
Range
(hexadecimal)
Function
000 - 00F
DMA controller A
020 - 021
Master interrupt controller
024
Index register - system board
026
Data register - system board
040 - 043
Interval timer
060 - 06F
Keyboard controller
070 - 07F
Real-time clock (RTC), NMI
080 - 08F
DMA page register
0A0 - 0A1
Slave interrupt controller
0C0 - 0CF
DMA controller B
0F0
Clear math coprocessor
0F1
Reset math coprocessor
0F8 - 0FF
Math coprocessor
1F0 - 1F7
IDE controller
220-22F
On-board sound (1688)
278 - 27F
*
LPT2
2E8 - 2EF
*
COM4
2F8 - 2FF
*
COM2
378 - 37F
*
LPT1
3B0 - 3DF
Mono VGA registers
3BC - 3BE
*
LPT3
3C0 - 3DF
Mono VGA
3D0 - 3DF
Color VGA registers
3E8 - 3EF
*
COM 3
3F0 - 3F7
*
Diskette controller
3F6 - 3F7
*
IDE controller (alt status, device address)
3F8 - 3FF
*
COM1
*
Enabled and disabled using the Setup Utility or Windows 95