Diamond Systems CME-Atom, User Manual, Page: 28 / 38

CME-Atom User Manual 1.2 www.diamondsystems.com Page 28
5. APPENDIX: SYSTEM RESOURCES REFERENCE
5.1 BIOS Memory Mapping
Address Device Description
00000h-9FFFFh DOS Kernel Area
A0000h,BFFFFh EGA and VGA Video Buffer (128KB)
C0000h-CFFFFh EGA/VGA ROM
D0000h-DFFFFh Adaptor ROM
E0000h-FFFFFh System BIOS
5.2 I/O Port Address Map
Each peripheral device in the system is assigned a set of I/O port addresses which also becomes the identity of
the device. The following table lists the I/O port addresses used.
( Note: IDE currently is not supported on the
CME-Atom.)
Address Device Description
0000h - 0000Fh DMA Controller
0080h - 009Fh DMA Controller
00C0h - 00DFh DMA Controller
0020h, 0021h Programmable Interrupt Controller
00A0h, 00A1h Programmable Interrupt Controller
0040h - 0043h System Timer
0044h - 0047h System Timer
0060h - 0064h Keyboard Controller
0070h - 0073h System CMOS/Real Time Clock
00F0h - 00FFh Math Co-Processor
01F0h-01F7h Primary IDE
0274h-0277h ISAPNP Read Data Port
0279h , 0A79h ISAPnP Configuration
02F8h-02FFh COM_2 (If use)
0378h-037Ah Parallel Port (If use)