D.2 1st MB memory map
Table
Addr. range (Hex) | Device |
F000h - FFFFh | System ROM |
|
|
E000h - EFFFh | Unused |
|
|
D000h - DFFFh | SCSI ROM |
|
|
*CC00h - CFFFh | Ethernet ROM |
|
|
C000h - CBFFh | Expansion ROM |
|
|
B800h - BFFFh | CGA/EGA/VGA text |
|
|
B000h - B7FFh | Unused |
|
|
A000h - AFFFh | EGA/VGA graphics |
|
|
0000h - 9FFFh | Base memory |
|
|
* If Ethernet boot ROM is enabled
D.3 DMA channel assignments
Table
Channel | Function |
0 | Available |
|
|
1 | Available |
|
|
2 | Floppy disk |
|
|
3 | Available (Parallel Port) |
|
|
4 | Cascade for DMA controller 1 |
|
|
5 | Available |
|
|
6 | Available |
|
|
7 | Available |
|
|
** Parallel port DMA select 1 or 3
Appendix D System Assignments | 107 |
