Technical data

BIOS and System Programming
CP 486 ⋅ 00/14 VIPA GmbH 79
4.4 Address Assignment, Interrupts and DMA Channels
4.4.1 Memory Address Assignment
000000 - 09FFFF 640KB DRAM main memory
0A0000 - 0BFFFF 128KB screen memory
0C0000 - 0C7FFF 32KB VGA-BIOS
0C8000 - 0C9FFF 8KB bank interface register area
ident register: C9F80
conf. register: C9F82
bank register 1: C9F84
bank register 2: C9F86
reset int-register: 0C9F8E
0CA000 - 0CBFFF 8KB bank interface data area
0CC000 - 0CFFFF 16KB reserved
0D0000 - 0D7FFF 64KB usable for
-EMS
- AT-bus additional modules
- special functions
0E0000 - 0FFFFF 128KB diagnostic, SETUP, AT-BIOS, Vipa-Utilities,
driver
100000 - 15FFFF expanded memory for 1Megabyte modules
45FFFF for 4Megabyte modules
.. - 7FFFFF usable for
- additional silicon disk board
- AT-bus additional modules
800000 - BFFFFF 4MB memory card silicon disk (optional up to 4MB)
C00000 - DFFFFF 2MB chip silicon disk (optional up to 2MB)
FE0000 - FFFFFF 128KB diagnostic, SETUP, AT-BIOS, Vipa-Utilities,
driver