Intel 810 Main Board
73
09 year
0a status register a
0b status register b
0c status register c
0d status register d
0e diagnostic status byte
0f shutdown byte
10 floppy disk drive type byte
12 hard disk type byte
13 reserve
14 equipment type
15 base memory low byte
16 base memory high byte
17 extension memory low byte
18 extension memory high byte
19-2d
2e-2f
30 Reserved for extension memory low byte
31 reserved for extension memory high byte
32 date century byte
33 information flag
34-3f reserve
40-7f reserved for chipset setting data
5-6 ISA I/O Address Map
I/O Address
(HEX)
I/O device
000 - 01F
DMA Controller 1, 8237A-5
020 - 03F
Interrupt Controller 1, 8259A
040 - 05F
System Timer, 8254-2
060 - 06F
8042 Keyboard Controller
070 - 07F
real-time Clock/CMOS and NMI Mask
080 - 09F
DMA Page Register, 74LS612
0A0 - 0BF
Interrupt Controller 2, 8259A
