Appendix Advanced Technical Information
Hippo DCA2 User’s Manual
30
A.2
I/O Address Map
I/O Address Hex 000 to 0FF are reserved for the system board and Hex 100 to 3FF are for
I/O channels.
Address (Hex)
Device
000-01F
DMA Controller 1, 8237A-5
020-021
Interrupt Controller 1, 8237A-5
022-023
Chip set Address
040-04F
Timer 1, 8254
050-05F
Timer 2, 8254
060-06F
8042 Keyboard/Controller
070-07F
Real Time Clock, Non-Maskable Interrupt Mask
080-09F
DMA Page Registers
0A0-0BF
Interrupt Controller 2,8259A
0C0-0DF
DMA Controller 2, 8237A-5
0F0
Clear Math Coprocessor Busy
0F1
Reset Math Coprocessor
0F8-0FF
Math Coprocessor
1F0-1F8
Fixed Disk
200-207
Game Ports
278-27F
Parallel Printer Port 2 (PIO-2)
2F8-2FF
Serial Port 2 (SIO-2)
300-31F
Prototype Card/Streaming Tape Adapter
360-363
PC Network, Low Address
368-36B
PC Network, High Address
378-37F
Parallel Printer Port 1 (PIO-1)
380-38F
SDLC, Bisynchronous 2
3A0-3AF
Bisynchronous 1
3B0-3BF
Monochrome Display and Primer Adapter
3C0-3CF
EGA Adapter
3D0-3DF
Color/Graphics Monitor Adapter
3F0-3F7
Diskette Controller
3F8-3FF
Serial Port 1 (SIO-1)
