![IEI Technology SAGP-648E User Manual Download Page 43](http://html.mh-extra.com/html/iei-technology/sagp-648e/sagp-648e_user-manual_619809043.webp)
43
Appendix B: Address Mapping
IO Address Map
I/O address Range
Description
000-01F
DMA Controller #1
020-021
Interrupt Controller #1, Master
040-05F 8254
timer
060-06F
8042 (Keyboard Controller)
070-07F
Real time Clock, NMI Mask
080-09F
DMA Page Register
0A0-0BF
Interrupt Controller #2
0C0-0DF
DMA Controller #2
0F0
Clear Math Coprocessor Busy
0F1
Reset Math Coprocessor
0F2
Core Logic Programming Configuration
0F8-0FF Math
Coprocessor
1F0-1F8 Fixed
Disk
200-207
Game I/O
278-27F Reserved
290-297 Hardware
Monitor
2F8-2FF
Serial Port 2
300-31F Prototype
Card
360-36F Reserved
378-37F
Parallel Printer Port 1
3B0-3BF Reserved
3C0-3CF Reserved
3D0-3DF
Color/Graphics Monitor Adapter
3E8-3EF Reserved
3F0-3F7 Diskette
Controller
3F8-3FF
Serial Port 1
1st MB Memory Address Map
Memory address
Description
00000-9FFFF System
memory
A0000-BFFFF VGA
buffer
C0000-C7FFF VGA
BIOS
F0000-FFFFF System
BIOS
1000000- Extend
BIOS
*Default setting